Using 2400 as the end of the day
Hello,
I've seen a number of posts around military time and whether or not 2400 is a valid time and suggestions on how to properly handle it, but I couldn't really find a post or direction that related directly to the situation I have. I have some users and they would like to use 2400 for time but are expecting that 2400 represents the end of the day and not the beginning of the day. When they see March 21, 24:00 they think of that as March 21, 23:59:59 and not March 21, 00:00:01. I can use the date format kkmm to parse 2400 as a valid time, so they can enter it and it will be saved to the database. The problem I'm having is that when it gets saved to the database 2400 still ends up being 0000 as the time, which is the beginning of the day. Is it possible to easily save 2400 for time in a date or timestamp field in the database and have it represent the end of day or would I need to do something like the following
1) not allow 2400 and say that 2359 is what should be used to represent end of day
2) or change to save the date as a varchar or number field and then have to change it to 2359 if I create a date object in the java code and want to do date arithmetic or comparisons.
>
The problem I'm having is that when it gets saved to the database 2400 still ends up being 0000 as the time, which is the beginning of the day. Is it possible to easily save 2400 for time in a date or timestamp field in the database and have it represent the end of day or would I need to do something like the following
>
What database are you talking about; Oracle?
Regardless of the DB you are confusing date/time storage with date/time presentation. Physical storage format and 'logical' interpretation of the value are two DIFFERENT things.
You cannot control how the data is physically stored. You can only control how you display it or interpret it.
For example, Oracle physically stores the HOUR in excess-1 notation where the hour byte ranges from 1 to 24. It could have been stored using many other physical formats. That doesn't prevent you from displaying the hour in 12-hour format instead of 24 hour format.
How you 'interpret' or display the value is up to you.
See the physical internal formats discussed in the Oracle® Call Interface Programmer's Guide
http://docs.oracle.com/cd/E11882_01/appdev.112/e10646/oci03typ.htm#i423684
>
DATE
The DATE data type can update, insert, or retrieve a date value using the Oracle internal date binary format. A date in binary format contains 7 bytes, as shown in Table 3-4.
Table 3-4 Format of the DATE Data Type
Byte 1 2 3 4 5 6 7
Meaning Century Year Month Day Hour Minute Second
Example (for 30-NOV-1992, 3:17 PM)
119 192 11 30 16 18 1 The century and year bytes (bytes 1 and 2) are in excess-100 notation. The first byte stores the value of the year, which is 1992, as an integer, divided by 100, giving 119 in excess-100 notation. The second byte stores year modulo 100, giving 192. Dates Before Common Era (BCE) are less than 100. The era begins on 01-JAN-4712 BCE, which is Julian day 1. For this date, the century byte is 53, and the year byte is 88. The hour, minute, and second bytes are in excess-1 notation. The hour byte ranges from 1 to 24, the minute and second bytes from 1 to 60. If no time was specified when the date was created, the time defaults to midnight (1, 1, 1).
Similar Messages
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Useful Code of the Day: Multipart Form File Upload
So, you want to upload files to your web server, do ya? Well, I've seen this topic posted a few times in the last month or so and many of the response I've seen here haven't included definitive answers. Of course, the actual problems vary, but ultimately, a bunch of people want to do file upload from an applet or application to an existing file upload script (CGI, PHP, JSP, etc.) on a web server. And invariably, there are problems with formatting the HTTP request to get things working.
Well, I had a need to do the same thing. I realize there are other solutions out there, such as some sample code that comes with Jakarta Commons Upload. But since we all like reusable code, and we also all seem to like reinventing wheels, here's my go at it: MultiPartFormOutputStream!
MultiPartFormOutputStream is a specialized OutputStream-like class. You create your URLConnection to the server (a static method included can do this for a URL for you, as some of the settings, doInput and doOutput specifically, seem to confuse people). Then get the OutputStream from it and create a boundary string (a static method to create one is provided as well) and pass them to the constructor. Now you have a MultiPartFormOutputStream which you can use to write form fields like text fields, checkboxes, etc., as well as write file data (from Files, InputStreams or raw bytes).
There are some convenience methods for writing primative type values as well as strings, but any higher level objects (aside from Files or InputStreams) aren't supported. (You can always serialize and pass the raw bytes.)
Sample usage code is below. Also, any recommendations for improvement are requested. The code was tested with the Jakarta Struts.
import java.io.*;
import java.net.*;
* <code>MultiPartFormOutputStream</code> is used to write
* "multipart/form-data" to a <code>java.net.URLConnection</code> for
* POSTing. This is primarily for file uploading to HTTP servers.
* @since JDK1.3
public class MultiPartFormOutputStream {
* The line end characters.
private static final String NEWLINE = "\r\n";
* The boundary prefix.
private static final String PREFIX = "--";
* The output stream to write to.
private DataOutputStream out = null;
* The multipart boundary string.
private String boundary = null;
* Creates a new <code>MultiPartFormOutputStream</code> object using
* the specified output stream and boundary. The boundary is required
* to be created before using this method, as described in the
* description for the <code>getContentType(String)</code> method.
* The boundary is only checked for <code>null</code> or empty string,
* but it is recommended to be at least 6 characters. (Or use the
* static createBoundary() method to create one.)
* @param os the output stream
* @param boundary the boundary
* @see #createBoundary()
* @see #getContentType(String)
public MultiPartFormOutputStream(OutputStream os, String boundary) {
if(os == null) {
throw new IllegalArgumentException("Output stream is required.");
if(boundary == null || boundary.length() == 0) {
throw new IllegalArgumentException("Boundary stream is required.");
this.out = new DataOutputStream(os);
this.boundary = boundary;
* Writes an boolean field value.
* @param name the field name (required)
* @param value the field value
* @throws java.io.IOException on input/output errors
public void writeField(String name, boolean value)
throws java.io.IOException {
writeField(name, new Boolean(value).toString());
* Writes an double field value.
* @param name the field name (required)
* @param value the field value
* @throws java.io.IOException on input/output errors
public void writeField(String name, double value)
throws java.io.IOException {
writeField(name, Double.toString(value));
* Writes an float field value.
* @param name the field name (required)
* @param value the field value
* @throws java.io.IOException on input/output errors
public void writeField(String name, float value)
throws java.io.IOException {
writeField(name, Float.toString(value));
* Writes an long field value.
* @param name the field name (required)
* @param value the field value
* @throws java.io.IOException on input/output errors
public void writeField(String name, long value)
throws java.io.IOException {
writeField(name, Long.toString(value));
* Writes an int field value.
* @param name the field name (required)
* @param value the field value
* @throws java.io.IOException on input/output errors
public void writeField(String name, int value)
throws java.io.IOException {
writeField(name, Integer.toString(value));
* Writes an short field value.
* @param name the field name (required)
* @param value the field value
* @throws java.io.IOException on input/output errors
public void writeField(String name, short value)
throws java.io.IOException {
writeField(name, Short.toString(value));
* Writes an char field value.
* @param name the field name (required)
* @param value the field value
* @throws java.io.IOException on input/output errors
public void writeField(String name, char value)
throws java.io.IOException {
writeField(name, new Character(value).toString());
* Writes an string field value. If the value is null, an empty string
* is sent ("").
* @param name the field name (required)
* @param value the field value
* @throws java.io.IOException on input/output errors
public void writeField(String name, String value)
throws java.io.IOException {
if(name == null) {
throw new IllegalArgumentException("Name cannot be null or empty.");
if(value == null) {
value = "";
--boundary\r\n
Content-Disposition: form-data; name="<fieldName>"\r\n
\r\n
<value>\r\n
// write boundary
out.writeBytes(PREFIX);
out.writeBytes(boundary);
out.writeBytes(NEWLINE);
// write content header
out.writeBytes("Content-Disposition: form-data; name=\"" + name + "\"");
out.writeBytes(NEWLINE);
out.writeBytes(NEWLINE);
// write content
out.writeBytes(value);
out.writeBytes(NEWLINE);
out.flush();
* Writes a file's contents. If the file is null, does not exists, or
* is a directory, a <code>java.lang.IllegalArgumentException</code>
* will be thrown.
* @param name the field name
* @param mimeType the file content type (optional, recommended)
* @param file the file (the file must exist)
* @throws java.io.IOException on input/output errors
public void writeFile(String name, String mimeType, File file)
throws java.io.IOException {
if(file == null) {
throw new IllegalArgumentException("File cannot be null.");
if(!file.exists()) {
throw new IllegalArgumentException("File does not exist.");
if(file.isDirectory()) {
throw new IllegalArgumentException("File cannot be a directory.");
writeFile(name, mimeType, file.getCanonicalPath(), new FileInputStream(file));
* Writes a input stream's contents. If the input stream is null, a
* <code>java.lang.IllegalArgumentException</code> will be thrown.
* @param name the field name
* @param mimeType the file content type (optional, recommended)
* @param fileName the file name (required)
* @param is the input stream
* @throws java.io.IOException on input/output errors
public void writeFile(String name, String mimeType,
String fileName, InputStream is)
throws java.io.IOException {
if(is == null) {
throw new IllegalArgumentException("Input stream cannot be null.");
if(fileName == null || fileName.length() == 0) {
throw new IllegalArgumentException("File name cannot be null or empty.");
--boundary\r\n
Content-Disposition: form-data; name="<fieldName>"; filename="<filename>"\r\n
Content-Type: <mime-type>\r\n
\r\n
<file-data>\r\n
// write boundary
out.writeBytes(PREFIX);
out.writeBytes(boundary);
out.writeBytes(NEWLINE);
// write content header
out.writeBytes("Content-Disposition: form-data; name=\"" + name +
"\"; filename=\"" + fileName + "\"");
out.writeBytes(NEWLINE);
if(mimeType != null) {
out.writeBytes("Content-Type: " + mimeType);
out.writeBytes(NEWLINE);
out.writeBytes(NEWLINE);
// write content
byte[] data = new byte[1024];
int r = 0;
while((r = is.read(data, 0, data.length)) != -1) {
out.write(data, 0, r);
// close input stream, but ignore any possible exception for it
try {
is.close();
} catch(Exception e) {}
out.writeBytes(NEWLINE);
out.flush();
* Writes the given bytes. The bytes are assumed to be the contents
* of a file, and will be sent as such. If the data is null, a
* <code>java.lang.IllegalArgumentException</code> will be thrown.
* @param name the field name
* @param mimeType the file content type (optional, recommended)
* @param fileName the file name (required)
* @param data the file data
* @throws java.io.IOException on input/output errors
public void writeFile(String name, String mimeType,
String fileName, byte[] data)
throws java.io.IOException {
if(data == null) {
throw new IllegalArgumentException("Data cannot be null.");
if(fileName == null || fileName.length() == 0) {
throw new IllegalArgumentException("File name cannot be null or empty.");
--boundary\r\n
Content-Disposition: form-data; name="<fieldName>"; filename="<filename>"\r\n
Content-Type: <mime-type>\r\n
\r\n
<file-data>\r\n
// write boundary
out.writeBytes(PREFIX);
out.writeBytes(boundary);
out.writeBytes(NEWLINE);
// write content header
out.writeBytes("Content-Disposition: form-data; name=\"" + name +
"\"; filename=\"" + fileName + "\"");
out.writeBytes(NEWLINE);
if(mimeType != null) {
out.writeBytes("Content-Type: " + mimeType);
out.writeBytes(NEWLINE);
out.writeBytes(NEWLINE);
// write content
out.write(data, 0, data.length);
out.writeBytes(NEWLINE);
out.flush();
* Flushes the stream. Actually, this method does nothing, as the only
* write methods are highly specialized and automatically flush.
* @throws java.io.IOException on input/output errors
public void flush() throws java.io.IOException {
// out.flush();
* Closes the stream. <br />
* <br />
* <b>NOTE:</b> This method <b>MUST</b> be called to finalize the
* multipart stream.
* @throws java.io.IOException on input/output errors
public void close() throws java.io.IOException {
// write final boundary
out.writeBytes(PREFIX);
out.writeBytes(boundary);
out.writeBytes(PREFIX);
out.writeBytes(NEWLINE);
out.flush();
out.close();
* Gets the multipart boundary string being used by this stream.
* @return the boundary
public String getBoundary() {
return this.boundary;
* Creates a new <code>java.net.URLConnection</code> object from the
* specified <code>java.net.URL</code>. This is a convenience method
* which will set the <code>doInput</code>, <code>doOutput</code>,
* <code>useCaches</code> and <code>defaultUseCaches</code> fields to
* the appropriate settings in the correct order.
* @return a <code>java.net.URLConnection</code> object for the URL
* @throws java.io.IOException on input/output errors
public static URLConnection createConnection(URL url)
throws java.io.IOException {
URLConnection urlConn = url.openConnection();
if(urlConn instanceof HttpURLConnection) {
HttpURLConnection httpConn = (HttpURLConnection)urlConn;
httpConn.setRequestMethod("POST");
urlConn.setDoInput(true);
urlConn.setDoOutput(true);
urlConn.setUseCaches(false);
urlConn.setDefaultUseCaches(false);
return urlConn;
* Creates a multipart boundary string by concatenating 20 hyphens (-)
* and the hexadecimal (base-16) representation of the current time in
* milliseconds.
* @return a multipart boundary string
* @see #getContentType(String)
public static String createBoundary() {
return "--------------------" +
Long.toString(System.currentTimeMillis(), 16);
* Gets the content type string suitable for the
* <code>java.net.URLConnection</code> which includes the multipart
* boundary string. <br />
* <br />
* This method is static because, due to the nature of the
* <code>java.net.URLConnection</code> class, once the output stream
* for the connection is acquired, it's too late to set the content
* type (or any other request parameter). So one has to create a
* multipart boundary string first before using this class, such as
* with the <code>createBoundary()</code> method.
* @param boundary the boundary string
* @return the content type string
* @see #createBoundary()
public static String getContentType(String boundary) {
return "multipart/form-data; boundary=" + boundary;
}Usage: (try/catch left out to shorten the post a bit)
URL url = new URL("http://www.domain.com/webems/upload.do");
// create a boundary string
String boundary = MultiPartFormOutputStream.createBoundary();
URLConnection urlConn = MultiPartFormOutputStream.createConnection(url);
urlConn.setRequestProperty("Accept", "*/*");
urlConn.setRequestProperty("Content-Type",
MultiPartFormOutputStream.getContentType(boundary));
// set some other request headers...
urlConn.setRequestProperty("Connection", "Keep-Alive");
urlConn.setRequestProperty("Cache-Control", "no-cache");
// no need to connect cuz getOutputStream() does it
MultiPartFormOutputStream out =
new MultiPartFormOutputStream(urlConn.getOutputStream(), boundary);
// write a text field element
out.writeField("myText", "text field text");
// upload a file
out.writeFile("myFile", "text/plain", new File("C:\\test.txt"));
// can also write bytes directly
//out.writeFile("myFile", "text/plain", "C:\\test.txt",
// "This is some file text.".getBytes("ASCII"));
out.close();
// read response from server
BufferedReader in = new BufferedReader(
new InputStreamReader(urlConn.getInputStream()));
String line = "";
while((line = in.readLine()) != null) {
System.out.println(line);
in.close();------
"Useful Code of the Day" is supplied by the person who posted this message. This code is not guaranteed by any warranty whatsoever. The code is free to use and modify as you see fit. The code was tested and worked for the author. If anyone else has some useful code, feel free to post it under this heading.I have a weird problem here. I'm using the Java POST (slightly altered for my purposes) mechanism but the receiving script doesn't receive any form variables (neither files nor regular form fields). If I try using the same receiving script with a regular upload form, it works. Because I've been pulling my hair out, I even went so far as to analyze the ip-packets. I can see that the file is actually sent through the Java POST mecahnism. Anybody any ideas. Here's the ip-packet of the failing upload:
----- Hypertext Transfer Protocol -----
HTTP: POST /fotoxs/upload.cfm HTTP/1.1
HTTP: Connection: Keep-Alive
HTTP: Content-Type: multipart/form-data; boundary=-----------------------------fb2649be18
HTTP: User-Agent: Mozilla/4.7 [en] (WinNT; U)
HTTP: Accept-Language: en-us
HTTP: Accept-Encoding: gzip, deflate
HTTP: Accept: image/gif, image/jpeg, image/pjpeg, */*
HTTP: CACHE-CONTROL: no-cache
HTTP: Host: newmarc
HTTP: Content-Length: 15511
----- Hypertext Transfer Protocol -----
HTTP: -----------------------------fb2649be18
HTTP: Content-Disposition: form-data; name="uploadFile"; filename="out.jpg"
HTTP: Content-Type: image/jpeg
HTTP: Data
....[data packets]
The one that works (from the regular post) is as follows:
----- Hypertext Transfer Protocol -----
HTTP: POST /fotoxs/upload.cfm HTTP/1.1
HTTP: Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-gsarcade-launch, application/x-shockwave-flash, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*
HTTP: Referer: http://localhost:8500/fotoxs/test.cfm
HTTP: Accept-Language: nl
HTTP: Content-Type: multipart/form-data; boundary=---------------------------7d41961f201c0
HTTP: Accept-Encoding: gzip, deflate
HTTP: User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)
HTTP: Host: newmarc
HTTP: Content-Length: 59022
HTTP: Connection: Keep-Alive
HTTP: Cache-Control: no-cache
----- Hypertext Transfer Protocol -----
HTTP: -----------------------------7d41961f201c0
HTTP: Content-Disposition: form-data; name="FiletoUpload"; filename="D:\My Documents\My Pictures\fotomarc.jpg"
HTTP: Content-Type: image/pjpeg
HTTP: Data
----- Hypertext Transfer Protocol -----
HTTP: HTTP/1.1 100 Continue
HTTP: Server: Microsoft-IIS/5.0
HTTP: Date: Sun, 07 Mar 2004 17:14:41 GMT
....[data packets]
One detail worth mentioning is that I don't read a file from harddisk, I'm streaming it directly to the connection outputstream from an image compression utility. But I can see the data in the ip-packets, and even if that somehow didn't work right, it doesn't explaing the fact that the receiving scripts reports no form fields whatsoever.
Thanks,
Marc -
Useful Code of the Day: Splash Screen & Busy Application
So you are making an Swing application. So what are two common things to do in it?
1) Display a splash screen.
2) Block user input when busy.
Enter AppFrame! It's a JFrame subclass which has a glass pane overlay option to block input (setBusy()). While "busy", it displays the system wait cursor.
It also supports display of a splash screen. There's a default splash screen if you don't provide a component to be the splash screen, and an initializer runner which takes a Runnable object. The Runnable object can then modify the splash screen component, for example to update a progress bar or text. See the main method for example usage.
It also has a method to center a component on another component (useful for dialogs) or center the component on the screen.
NOTE on setBusy: I do recall issues with the setBusy option to block input. I recall it having a problem on some Unix systems, but I can't remember the details offhand (sorry).
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
* <CODE>AppFrame</CODE> is a <CODE>javax.swing.JFrame</CODE> subclass that
* provides some convenient methods for applications. This class implements
* all the same constructors as <CODE>JFrame</CODE>, plus a few others.
* Methods exist to show the frame centered on the screen, display a splash
* screen, run an initializer thread and set the frame as "busy" to block
* user input.
public class AppFrame extends JFrame implements KeyListener, MouseListener {
* The splash screen window.
private JWindow splash = null;
* The busy state of the frame.
private boolean busy = false;
* The glass pane used when busy.
private Component glassPane = null;
* The original glass pane, which is reset when not busy.
private Component defaultGlassPane = null;
* Creates a new <CODE>AppFrame</CODE>.
public AppFrame() {
super();
init();
* Creates a new <CODE>AppFrame</CODE> with the specified
* <CODE>GraphicsConfiguration</CODE>.
* @param gc the GraphicsConfiguration of a screen device
public AppFrame(GraphicsConfiguration gc) {
super(gc);
init();
* Creates a new <CODE>AppFrame</CODE> with the specified title.
* @param title the title
public AppFrame(String title) {
super(title);
init();
* Creates a new <CODE>AppFrame</CODE> with the specified title and
* <CODE>GraphicsConfiguration</CODE>.
* @param title the title
* @param gc the GraphicsConfiguration of a screen device
public AppFrame(String title, GraphicsConfiguration gc) {
super(title, gc);
init();
* Creates a new <CODE>AppFrame</CODE> with the specified title and
* icon image.
* @param title the title
* @param icon the image icon
public AppFrame(String title, Image icon) {
super(title);
setIconImage(icon);
init();
* Creates a new <CODE>AppFrame</CODE> with the specified title and
* icon image.
* @param title the title
* @param icon the image icon
public AppFrame(String title, ImageIcon icon) {
this(title, icon.getImage());
* Initializes internal frame settings.
protected void init() {
// set default close operation (which will likely be changed later)
setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
// set up the glass pane
glassPane = new JPanel();
((JPanel)glassPane).setOpaque(false);
glassPane.addKeyListener(this);
glassPane.addMouseListener(this);
* Displays a new <CODE>JWindow</CODE> as a splash screen using the
* specified component as the content. The default size of the
* component will be used to size the splash screen. See the
* <CODE>showSplash(Component, int, int)</CODE> method description for
* more details.
* @param c the splash screen contents
* @return the window object
* @see #showSplash(Component, int, int)
* @see #hideSplash()
public JWindow showSplash(Component c) {
return showSplash(c, -1, -1);
* Displays a new <CODE>JWindow</CODE> as a splash screen using the
* specified component as the content. The component should have all
* the content it needs to display, like borders, images, text, etc.
* The splash screen is centered on monitor. If width and height are
* <CODE><= 0</CODE>, the default size of the component will be used
* to size the splash screen.
* <P>
* The window object is returned to allow the application to manipulate
* it, (such as move it or resize it, etc.). However, <B>do not</B>
* dispose the window directly. Instead, use <CODE>hideSplash()</CODE>
* to allow internal cleanup.
* <P>
* If the component is <CODE>null</CODE>, a default component with the
* frame title and icon will be created.
* <P>
* The splash screen window will be passed the same
* <CODE>GraphicsConfiguration</CODE> as this frame uses.
* @param c the splash screen contents
* @param w the splash screen width
* @param h the splash screen height
* @return the window object
* @see #showSplash(Component)
* @see #hideSplash()
public JWindow showSplash(Component c, int w, int h) {
// if a splash window was already created...
if(splash != null) {
// if it's showing, leave it; else null it
if(splash.isShowing()) {
return splash;
} else {
splash = null;
// if the component is null, then create a generic splash screen
// based on the frame title and icon
if(c == null) {
JPanel p = new JPanel();
p.setBorder(BorderFactory.createCompoundBorder(
BorderFactory.createRaisedBevelBorder(),
BorderFactory.createEmptyBorder(10, 10, 10, 10)
JLabel l = new JLabel("Loading application...");
if(getTitle() != null) {
l.setText("Loading " + getTitle() + "...");
if(getIconImage() != null) {
l.setIcon(new ImageIcon(getIconImage()));
p.add(l);
c = p;
splash = new JWindow(this, getGraphicsConfiguration());
splash.getContentPane().add(c);
splash.pack();
// set the splash screen size
if(w > 0 && h > 0) {
splash.setSize(w, h);
} else {
splash.setSize(c.getPreferredSize().width, c.getPreferredSize().height);
centerComponent(splash);
splash.show();
return splash;
* Disposes the splash window.
* @see #showSplash(Component, int, int)
* @see #showSplash(Component)
public void hideSplash() {
if(splash != null) {
splash.dispose();
splash = null;
* Runs an initializer <CODE>Runnable</CODE> object in a new thread.
* The initializer object should handle application initialization
* steps. A typical use would be:
* <OL>
* <LI>Create the frame.
* <LI>Create the splash screen component.
* <LI>Call <CODE>showSplash()</CODE> to display splash screen.
* <LI>Run the initializer, in which:
* <UL>
* <LI>Build the UI contents of the frame.
* <LI>Perform other initialization (load settings, data, etc.).
* <LI>Pack and show the frame.
* <LI>Call <CODE>hideSplash()</CODE>.
* </UL>
* </OL>
* <P>
* <B>NOTE:</B> Since this will be done in a new thread that is
* external to the event thread, any updates to the splash screen that
* might be done should be triggered through with
* <CODE>SwingUtilities.invokeAndWait(Runnable)</CODE>.
* @param r the <CODE>Runnable</CODE> initializer
public void runInitializer(Runnable r) {
Thread t = new Thread(r);
t.start();
* Shows the frame centered on the screen.
public void showCentered() {
centerComponent(this);
this.show();
* Checks the busy state.
* @return <CODE>true</CODE> if the frame is disabled;
* <CODE>false</CODE> if the frame is enabled
* @see #setBusy(boolean)
public boolean isBusy() {
return this.busy;
* Sets the busy state. When busy, the glasspane is shown which will
* consume all mouse and keyboard events, and a wait cursor is
* set for the frame.
* @param busy if <CODE>true</CODE>, disables frame;
* if <CODE>false</CODE>, enables frame
* @see #getBusy()
public void setBusy(boolean busy) {
// only set if changing
if(this.busy != busy) {
this.busy = busy;
// If busy, keep current glass pane to put back when not
// busy. This is done in case the application is using
// it's own glass pane for something special.
if(busy) {
defaultGlassPane = getGlassPane();
setGlassPane(glassPane);
} else {
setGlassPane(defaultGlassPane);
defaultGlassPane = null;
glassPane.setVisible(busy);
glassPane.setCursor(busy ?
Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR) :
Cursor.getDefaultCursor()
setCursor(glassPane.getCursor());
* Handle key typed events. Consumes the event for the glasspane
* when the frame is busy.
* @param ke the key event
public void keyTyped(KeyEvent ke) {
ke.consume();
* Handle key released events. Consumes the event for the glasspane
* when the frame is busy.
* @param ke the key event
public void keyReleased(KeyEvent ke) {
ke.consume();
* Handle key pressed events. Consumes the event for the glasspane
* when the frame is busy.
* @param ke the key event
public void keyPressed(KeyEvent ke) {
ke.consume();
* Handle mouse clicked events. Consumes the event for the glasspane
* when the frame is busy.
* @param me the mouse event
public void mouseClicked(MouseEvent me) {
me.consume();
* Handle mouse entered events. Consumes the event for the glasspane
* when the frame is busy.
* @param me the mouse event
public void mouseEntered(MouseEvent me) {
me.consume();
* Handle mouse exited events. Consumes the event for the glasspane
* when the frame is busy.
* @param me the mouse event
public void mouseExited(MouseEvent me) {
me.consume();
* Handle mouse pressed events. Consumes the event for the glasspane
* when the frame is busy.
* @param me the mouse event
public void mousePressed(MouseEvent me) {
me.consume();
* Handle mouse released events. Consumes the event for the glasspane
* when the frame is busy.
* @param me the mouse event
public void mouseReleased(MouseEvent me) {
me.consume();
* Centers the component <CODE>c</CODE> on the screen.
* @param c the component to center
* @see #centerComponent(Component, Component)
public static void centerComponent(Component c) {
centerComponent(c, null);
* Centers the component <CODE>c</CODE> on component <CODE>p</CODE>.
* If <CODE>p</CODE> is null, the component <CODE>c</CODE> will be
* centered on the screen.
* @param c the component to center
* @param p the parent component to center on or null for screen
* @see #centerComponent(Component)
public static void centerComponent(Component c, Component p) {
if(c != null) {
Dimension d = (p != null ? p.getSize() :
Toolkit.getDefaultToolkit().getScreenSize()
c.setLocation(
Math.max(0, (d.getSize().width/2) - (c.getSize().width/2)),
Math.max(0, (d.getSize().height/2) - (c.getSize().height/2))
* Main method. Used for testing.
* @param args the arguments
public static void main(String[] args) {
final AppFrame f = new AppFrame("Test Application",
new ImageIcon("center.gif"));
f.showSplash(null);
f.runInitializer(new Runnable() {
public void run() {
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(new JButton("this is a frame"));
f.pack();
f.setSize(300, 400);
try {
Thread.currentThread().sleep(3000);
} catch(Exception e) {}
f.showCentered();
f.setBusy(true);
try {
Thread.currentThread().sleep(100);
} catch(Exception e) {}
f.hideSplash();
try {
Thread.currentThread().sleep(3000);
} catch(Exception e) {}
f.setBusy(false);
"Useful Code of the Day" is supplied by the person who posted this message. This code is not guaranteed by any warranty whatsoever. The code is free to use and modify as you see fit. The code was tested and worked for the author. If anyone else has some useful code, feel free to post it under this heading.Hi
Thanks fo this piece of code. This one really help me
Deepa -
Useful Code of the Day: Button fires events while held
Have you ever been making a GUI application with Swing and used some JButtons? Fun, right? Have you ever wanted to have the button fire action events while the button was being held down? Well, if you just stick a plain JButton in your application and press and hold the mouse button on it, you'll see it doesn't do anything except sit there looking pressed in. Insolent button!
RepeatButton (code below, couldn't think of a better name) is a JButton subclass which contains a timer that is set when the mouse button presses the button, and after a slight initial delay (configurable), fires action events to all registered action listeners repeatedly (with another configurable delay between events) until either the mouse is released or the mouse moves out of the button (it starts up again if the mouse moves back over without releasing the mouse button) or the button is disabled. The event modifiers are passed on as well, so you know if the shift or control buttons (or whatever) are being pressed at the same time.
There is also a method to disable the repeated action firing while holding. This, in effect, turns the button into a normal JButton, if needed.
There is a main method for testing which will show a button in a frame and print out the action command for each action event fired.
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.swing.*;
import javax.swing.event.*;
* <code>RepeatButton</code> is a <code>JButton</code> which contains a timer
* for firing events while the button is held down. There is a default
* initial delay of 300ms before the first event is fired and a 60ms delay
* between subsequent events. When the user holds the button down and moves
* the mouse out from over the button, the timer stops, but if the user moves
* the mouse back over the button without having released the mouse button,
* the timer starts up again at the same delay rate. If the enabled state is
* changed while the timer is active, it will be stopped.
* NOTE: The normal button behavior is that the action event is fired after
* the button is released. It may be important to konw then that this is
* still the case. So in effect, listeners will get 1 more event then what
* the internal timer fires. It's not a "bug", per se, just something to be
* aware of. There seems to be no way to suppress the final event from
* firing anyway, except to process all ActionListeners internally. But
* realistically, it probably doesn't matter.
public class RepeatButton extends JButton
implements ActionListener, MouseListener {
* The pressed state for this button.
private boolean pressed = false;
* Flag to indicate that the button should fire events when held.
* If false, the button is effectively a plain old JButton, but
* there may be times when this feature might wish to be disabled.
private boolean repeatEnabled = true;
* The hold-down timer for this button.
private Timer timer = null;
* The pressed state for this button.
private int delay = 60;
* The pressed state for this button.
private int initialDelay = 300;
* Holder of the modifiers used when the mouse pressed the button.
* This is used for subsequently fired action events. This may change
* after mouse pressed if the user moves the mouse out, releases a key
* and then moves the mouse back in.
private int modifiers = 0;
* Creates a button with no set text or icon.
public RepeatButton() {
super();
init();
* Creates a button where properties are taken from the Action supplied.
* @param a the button action
public RepeatButton(Action a) {
super(a);
init();
* Creates a button with an icon.
* @param icon the button icon
public RepeatButton(Icon icon) {
super(icon);
init();
* Creates a button with text.
* @param text the button text
public RepeatButton(String text) {
super(text);
init();
* Creates a button with initial text and an icon.
* @param text the button text
* @param icon the button icon
public RepeatButton(String text, Icon icon) {
super(text, icon);
init();
* Initializes the button.
private void init() {
this.addMouseListener(this);
// initialize timers for button holding...
this.timer = new Timer(this.delay, this);
this.timer.setRepeats(true);
* Gets the delay for the timer of this button.
* @return the delay
public int getDelay() {
return this.delay;
* Set the delay for the timer of this button.
* @param d the delay
public void setDelay(int d) {
this.delay = d;
* Gets the initial delay for the timer of this button.
* @return the initial delay
public int getInitialDelay() {
return this.initialDelay;
* Sets the initial delay for the timer of this button.
* @param d the initial delay
public void setInitialDelay(int d) {
this.initialDelay = d;
* Checks if the button should fire events when held. If false, the
* button is effectively a plain old JButton, but there may be times
* when this feature might wish to be disabled.
* @return if true, the button should fire events when held
public boolean isRepeatEnabled() {
return this.repeatEnabled;
* Sets if the button should fire events when held. If false, the
* button is effectively a plain old JButton, but there may be times
* when this feature might wish to be disabled. If false, it will
* also stop the timer if it's running.
* @param en if true, the button should fire events when held
public void setRepeatEnabled(boolean en) {
if(!en) {
this.pressed = false;
if(timer.isRunning()) {
timer.stop();
this.repeatEnabled = en;
* Sets the enabled state of this button. Overridden to stop the timer
* if it's running.
* @param en if true, enables the button
public void setEnabled(boolean en) {
if(en != super.isEnabled()) {
this.pressed = false;
if(timer.isRunning()) {
timer.stop();
super.setEnabled(en);
* Handle action events.
* @param ae the action event
public void actionPerformed(ActionEvent ae) {
// process events only from this components
if(ae.getSource() == this.timer) {
ActionEvent event = new ActionEvent(
this, ActionEvent.ACTION_PERFORMED,
super.getActionCommand(), this.modifiers);
super.fireActionPerformed(event);
// testing code...
else if(testing && ae.getSource() == this) {
System.out.println(ae.getActionCommand());
* Handle mouse clicked events.
* @param me the mouse event
public void mouseClicked(MouseEvent me) {
// process events only from this components
if(me.getSource() == this) {
this.pressed = false;
if(this.timer.isRunning()) {
this.timer.stop();
* Handle mouse pressed events.
* @param me the mouse event
public void mousePressed(MouseEvent me) {
// process events only from this components
if(me.getSource() == this && this.isEnabled() && this.isRepeatEnabled()) {
this.pressed = true;
if(!this.timer.isRunning()) {
this.modifiers = me.getModifiers();
this.timer.setInitialDelay(this.initialDelay);
this.timer.start();
* Handle mouse released events.
* @param me the mouse event
public void mouseReleased(MouseEvent me) {
// process events only from this components
if(me.getSource() == this) {
this.pressed = false;
if(this.timer.isRunning()) {
this.timer.stop();
* Handle mouse entered events.
* @param me the mouse event
public void mouseEntered(MouseEvent me) {
// process events only from this components
if(me.getSource() == this && this.isEnabled() && this.isRepeatEnabled()) {
if(this.pressed && !this.timer.isRunning()) {
this.modifiers = me.getModifiers();
this.timer.setInitialDelay(this.delay);
this.timer.start();
* Handle mouse exited events.
* @param me the mouse event
public void mouseExited(MouseEvent me) {
// process events only from this components
if(me.getSource() == this) {
if(this.timer.isRunning()) {
this.timer.stop();
* Testing flag. Set in main method.
private static boolean testing = false;
* Main method, for testing. Creates a frame with both styles of menu.
* @param args the command-line arguments
public static void main(String[] args) {
testing = true;
JFrame f = new JFrame("RepeatButton Test");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JPanel p = new JPanel();
RepeatButton b = new RepeatButton("hold me");
b.setActionCommand("test");
b.addActionListener(b);
p.add(b);
f.getContentPane().add(p);
f.pack();
f.show();
"Useful Code of the Day" is supplied by the person who posted this message. This code is not guaranteed by any warranty whatsoever. The code is free to use and modify as you see fit. The code was tested and worked for the author. If anyone else has some useful code, feel free to post it under this heading.This makes word completion possible for JTextArea:
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;
import javax.swing.text.*;
import java.util.*;
* This class provides word completion for JTextArea.
public class WordCompleteArea extends JTextArea {
private boolean isTextComplete = true;
public WordCompleteArea (Document doc, String text,
int rows, int columns, KeyStroke expandKey) {
super (doc, text, rows, columns);
String s = "word-complete";
Action wordComplete = new AbstractAction () {
public void actionPerformed (ActionEvent e) {
wordComplete ();
getInputMap ().put (expandKey, s);
getActionMap ().put (s, wordComplete);
public WordCompleteArea (Document doc, String text, int rows, int columns) {
this (doc, text, rows, columns,
KeyStroke.getKeyStroke ("ctrl pressed SPACE"));
public WordCompleteArea (Document doc) {
this (doc, null, 0, 0);
public WordCompleteArea (String text, int rows, int columns) {
this (new PlainDocument (), text, rows, columns);
public WordCompleteArea (int rows, int columns) {
this (null, rows, columns);
public WordCompleteArea (String text) {
this (text, 0, 0);
public WordCompleteArea () {
this (0, 0);
* Define if text already written in the JTextArea will be used
* for expansion.
public void setTextComplete (boolean b) {
isTextComplete = b;
* Find out if text already written in the JTextArea will be used
* for expansion.
public boolean isTextComplete () {
return isTextComplete;
private String tokenDelimiters = "\t\r\n ,;()[]{}%+/-*<>=&|!\"\'.@#";
* Get delimiters that form a word.
public String getTokenDelimiters () {
return tokenDelimiters;
* Set delimiters that form a word.
public void setTokenDelimiters (String s) {
tokenDelimiters = s;
// Additional words used for expansion.
private LinkedList wordCompleteList = new LinkedList ();
* Add words that will be used as expansion.
public void addCompleteWords (java.util.List words) {
wordCompleteList.add (words);
* Add a word that will be used as expansion.
public void addCompleteWord (String word) {
wordCompleteList.add (word);
private String lastExpanded = null;
private String lastExpansion = null;
private Set dontAccept = new HashSet ();
protected void wordComplete () {
int caret = getCaretPosition ();
if (caret == 0)
return;
String text = getText ();
if (caret != text.length () && isCompletionLetter (text.charAt (caret)))
return;
StringBuffer sb = new StringBuffer ();
int index = caret - 1;
char ch;
while (index >= 0 && isCompletionLetter ((ch = text.charAt (index)))) {
sb.append (ch);
index--;
if (sb.length () == 0)
return;
sb.reverse ();
String word = sb.toString ();
String toExpand = word;
if (toExpand.equals (lastExpansion)) {
dontAccept.add (lastExpansion);
toExpand = lastExpanded;
} else {
dontAccept.clear ();
String s = findExpansion (toExpand, caret);
if (s != null) {
lastExpanded = toExpand;
lastExpansion = s;
replaceRange (s, caret - word.length (), caret);
} else {
dontAccept.clear ();
lastExpanded = null;
lastExpansion = null;
int diff = word.length () - toExpand.length ();
replaceRange ("", caret - diff, caret);
private boolean isCompletionLetter (char ch) {
return tokenDelimiters.indexOf (ch) < 0;
protected String findExpansion (String word, int caret) {
StringTokenizer st;
if (isTextComplete) {
st = new StringTokenizer (getText (), getTokenDelimiters ());
while (st.hasMoreTokens ()) {
String s = st.nextToken ();
if ( s.startsWith (word)
&& s.length () != word.length ()
&& !dontAccept.contains (s) ) {
return s;
for (Iterator it = wordCompleteList.iterator (); it.hasNext (); ) {
st = new StringTokenizer
((String) it.next (), getTokenDelimiters ());
while (st.hasMoreTokens ()) {
String s = st.nextToken ();
if ( s.startsWith (word)
&& s.length () != word.length ()
&& !dontAccept.contains (s) ) {
return s;
return null;
// TEST
public static void main (String[] args) {
WordCompleteArea a = new WordCompleteArea ();
JFrame window = new JFrame ();
window.getContentPane ().add (a, BorderLayout.CENTER);
window.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
window.setSize (300, 300);
window.setVisible (true);
} -
Useful Code of the Day: Hideable Tree Nodes
Someone posted about how they could selectively hide tree nodes, and I already had this AbstractTreeModel class (which does some things DefaultTreeModel does and some it doesn't) and a concrete subclass for TreeNode objects, so I was thinking how one could do hideable nodes. So I came up with this solution.
There's 4 classes here:
- AbstractTreeModel is the base for the concrete TreeNodeTreeModel
- TreeNodeTreeModel extends AbstractTreeModel to support TreeNodes (DefautlMutableTreeNode, etc.)
- HideableMutableTreeNode which is a DefautlMutableTreeNode subclass which has a visible field (with is/set methods, of course).
- HideableTreeModel is the hideable model which is a subclass of TreeNodeTreeModel.
A HideableMutableTreeNode can be set invisible directly, but the tree still needs to be notified to update. So it's best to use the methods in HideableTreeModel which set a node's visibility which notify the tree of changes accordingly. Methods are also provided to check a full path's visibility or ensure a node including all parent nodes are visible.
A HideableTreeModel can take any TreeNode class, it doesn't have to be all HideableMutableTreeNodes, but only HideableMutableTreeNodes can be made invisible, of course. Any other TreeNode type would just be considered visible.
Hiding nodes works basically by making the tree think there's less nodes then there are. And to do this, the node counts and child index search just works by looping thru the parent's children. This has potential perfomance drawbacks of course, since one has to loop thru the node's children to get nodes every time. This could be alleviated by not supporting non-hideable nodes changing the internal maintenance of HideableMutableTreeNode contents. But I'll leave that to whoever really needs it. It shouldn't be a problem if there are are a relatively small set of child nodes in any given parent.
Also, note that the root node in the model cannot be made invisible, cuz it'd be redundant since JTree can be set to hide the root node.
// *** HideableTreeModel ***
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
* <code>HideableTreeModel</code> is an <code>TreeNodeTreeModel</code>
* implementation for <code>HideableMutableTreeNode</code> objects. The
* model can also take any other <code>javax.swing.tree.TreeNode</code>
* objects.
public class HideableTreeModel extends TreeNodeTreeModel {
* Creates a new <code>HideableTreeModel</code> object.
* @param root the root node
public HideableTreeModel(TreeNode root) {
super(root);
* Checks if the specified node is visible. A node can only be
* hidden if the node is an instance of <code>HideableMutableTreeNode</code>. <br />
* <br />
* Note that this only test the visibility of the specified node, not
* whether a parent node is visible. Use <code>isPathToNodeVisible(Object)</code>
* to check if the full path is visible.
* @param node the node
* @param true if the node is visible, else false
public boolean isNodeVisible(Object node) {
if(node != getRoot()) {
if(node instanceof HideableMutableTreeNode) {
return ((HideableMutableTreeNode)node).isVisible();
return true;
* Sets the specified node to be hidden. A node can only be made hidden
* if the node is an instance of <code>HideableMutableTreeNode</code>. <br />
* <br />
* Note that this method will notify the tree to reflect any changes to
* node visibility. <br />
* <br />
* Note that this will not alter the visibility of any nodes in the
* specified node's path to the root node. Use
* <code>ensurePathToNodeVisible(Object)</code> instead to make sure the
* full path down to that node is visible. <br />
* <br />
* Note that this method will notify the tree to reflect any changes to
* node visibility.
* @param node the node
* @param v true for visible, false for hidden
* @param true if the node's visibility could actually change, else false
public boolean setNodeVisible(Object node, boolean v) {
// can't hide root
if(node != getRoot()) {
if(node instanceof HideableMutableTreeNode) {
HideableMutableTreeNode n = (HideableMutableTreeNode)node;
// don't fix what ain't broke...
if(v != n.isVisible()) {
TreeNode parent = n.getParent();
if(v) {
// need to get index after showing...
n.setVisible(v);
int index = getIndexOfChild(parent, n);
super.nodeInserted(parent, n, index);
} else {
// need to get index before hiding...
int index = getIndexOfChild(parent, n);
n.setVisible(v);
super.nodeRemoved(parent, n, index);
return true;
return false;
* Checks if the specified node is visible and all nodes above it are
* visible.
* @param node the node
* @param true if the path is visible, else false
public boolean isPathToNodeVisible(Object node) {
Object[] path = getPathToRoot(node);
for(int i = 0; i < path.length; i++) {
if(!isNodeVisible(path)) {
return false;
return true;
* Sets the specified node and all nodes above it to be visible.
* Note that this method will notify the tree to reflect any changes to
* node visibility.
* @param node the node
public void ensurePathToNodeVisible(Object node) {
Object[] path = getPathToRoot(node);
for(int i = 0; i < path.length; i++) {
setNodeVisible(path[i], true);
* Returns the child of parent at index index in the parent's child array.
* @param parent the parent node
* @param index the index
* @return the child or null if no children
public Object getChild(Object parent, int index) {
if(parent instanceof TreeNode) {
TreeNode p = (TreeNode)parent;
for(int i = 0, j = -1; i < p.getChildCount(); i++) {
TreeNode pc = (TreeNode)p.getChildAt(i);
if(isNodeVisible(pc)) {
j++;
if(j == index) {
return pc;
return null;
* Returns the number of children of parent.
* @param parent the parent node
* @return the child count
public int getChildCount(Object parent) {
int count = 0;
if(parent instanceof TreeNode) {
TreeNode p = (TreeNode)parent;
for(int i = 0; i < p.getChildCount(); i++) {
TreeNode pc = (TreeNode)p.getChildAt(i);
if(isNodeVisible(pc)) {
count++;
return count;
* Returns the index of child in parent.
* @param parent the parent node
* @param child the child node
* @return the index of the child node in the parent
public int getIndexOfChild(Object parent, Object child) {
int index = -1;
if(parent instanceof TreeNode && child instanceof TreeNode) {
TreeNode p = (TreeNode)parent;
TreeNode c = (TreeNode)child;
if(isNodeVisible(c)) {
index = 0;
for(int i = 0; i < p.getChildCount(); i++) {
TreeNode pc = (TreeNode)p.getChildAt(i);
if(pc.equals(c)) {
return index;
if(isNodeVisible(pc)) {
index++;
return index;
* Main method for testing.
* @param args the command-line arguments
public static void main(String[] args) {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
HideableMutableTreeNode root = new HideableMutableTreeNode("root");
root.add(new HideableMutableTreeNode("child_1"));
final HideableMutableTreeNode c2 = new HideableMutableTreeNode("child_2");
c2.setVisible(false);
final HideableMutableTreeNode c2a = new HideableMutableTreeNode("child_2_A");
c2.add(c2a);
c2.add(new HideableMutableTreeNode("child_2_B"));
root.add(c2);
HideableMutableTreeNode c3 = new HideableMutableTreeNode("child_3");
HideableMutableTreeNode cC = new HideableMutableTreeNode("child_3_C");
cC.setVisible(false);
c3.add(cC);
c3.add(new HideableMutableTreeNode("child_3_D"));
root.add(c3);
root.add(new HideableMutableTreeNode("child_4"));
root.add(new HideableMutableTreeNode("child_5"));
DefaultMutableTreeNode c6 = new DefaultMutableTreeNode("child_6");
c6.add(new DefaultMutableTreeNode("child_6_A"));
c6.add(new DefaultMutableTreeNode("child_6_B"));
root.add(c6);
final HideableTreeModel model = new HideableTreeModel(root);
JTree tree = new JTree(model);
f.getContentPane().add(new JScrollPane(tree), BorderLayout.CENTER);
JButton b = new JButton("toggle");
b.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
model.setNodeVisible(c2, !model.isNodeVisible(c2));
//model.ensurePathToNodeVisible(c2a);
f.getContentPane().add(b, BorderLayout.SOUTH);
f.pack();
f.setSize(300, 500);
f.show();
// *** HideableMutableTreeNode ***
import javax.swing.*;
import javax.swing.tree.*;
* <code>HideableMutableTreeNode</code> is a <code>DefaultMutableTreeNode</code>
* implementation that works with <code>HideableTreeModel</code>.
public class HideableMutableTreeNode extends DefaultMutableTreeNode {
* The node is visible flag.
public boolean visible = true;
* Creates a tree node that has no parent and no children, but which
* allows children.
public HideableMutableTreeNode() {
super();
* Creates a tree node with no parent, no children, but which allows
* children, and initializes it with the specified user object.
* @param userObject - an Object provided by the user that
* constitutes the node's data
public HideableMutableTreeNode(Object userObject) {
super(userObject);
* Creates a tree node with no parent, no children, initialized with the
* specified user object, and that allows children only if specified.
* @param userObject - an Object provided by the user that
* constitutes the node's data
* @param allowsChildren - if true, the node is allowed to have child
* nodes -- otherwise, it is always a leaf node
public HideableMutableTreeNode(Object userObject, boolean allowsChildren) {
super(userObject, allowsChildren);
* Checks if the node is visible.
* @return true if the node is visible, else false
public boolean isVisible() {
return this.visible;
* Sets if the node is visible.
* @param v true if the node is visible, else false
public void setVisible(boolean v) {
this.visible = v;
// *** TreeNodeTreeModel ***
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
* <code>TreeNodeTreeModel</code> is an <code>AbstractTreeModel</code>
* implementation for <code>javax.swing.tree.TreeNode</code> objects.
public class TreeNodeTreeModel extends AbstractTreeModel {
* Creates a new <code>TreeNodeTreeModel</code> object.
* @param root the root node
public TreeNodeTreeModel(TreeNode root) {
super();
setRoot(root);
* Returns the parent of the child node.
* @param node the child node
* @return the parent or null if root
public Object getParent(Object node) {
if(node != getRoot() && (node instanceof TreeNode)) {
return ((TreeNode)node).getParent();
return null;
* Returns the child of parent at index index in the parent's child array.
* @param parent the parent node
* @param index the index
* @return the child or null if no children
public Object getChild(Object parent, int index) {
if(parent instanceof TreeNode) {
return ((TreeNode)parent).getChildAt(index);
return null;
* Returns the number of children of parent.
* @param parent the parent node
* @return the child count
public int getChildCount(Object parent) {
if(parent instanceof TreeNode) {
return ((TreeNode)parent).getChildCount();
return 0;
* Returns the index of child in parent.
* @param parent the parent node
* @param child the child node
* @return the index of the child node in the parent
public int getIndexOfChild(Object parent, Object child) {
if(parent instanceof TreeNode && child instanceof TreeNode) {
return ((TreeNode)parent).getIndex((TreeNode)child);
return -1;
* Returns true if node is a leaf.
* @param node the node
* @return true if the node is a leaf
public boolean isLeaf(Object node) {
if(node instanceof TreeNode) {
return ((TreeNode)node).isLeaf();
return true;
* Main method for testing.
* @param args the command-line arguments
public static void main(String[] args) {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
root.add(new DefaultMutableTreeNode("child_1"));
DefaultMutableTreeNode c2 = new DefaultMutableTreeNode("child_2");
c2.add(new DefaultMutableTreeNode("child_2_A"));
c2.add(new DefaultMutableTreeNode("child_2_B"));
root.add(c2);
root.add(new DefaultMutableTreeNode("child_3"));
root.add(new DefaultMutableTreeNode("child_4"));
JTree tree = new JTree(new TreeNodeTreeModel(root));
f.getContentPane().add(new JScrollPane(tree));
f.pack();
f.setSize(300, 500);
f.show();
// *** AbstractTreeModel ***
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.text.*;
import java.util.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.tree.*;
public abstract class AbstractTreeModel implements TreeModel {
* The list of tree model listeners.
private Vector modelListeners = new Vector();
* The root object of the tree.
private Object root = null;
* Basic no-op constructor.
public AbstractTreeModel() {
* Gets the root object of the tree.
* @return the root object
public Object getRoot() {
return this.root;
* Sets the root object of the tree.
* @param r the root object
protected void setRoot(Object r) {
this.root = r;
* Gets the path to the root node for the specified object.
* @param node the root node
* @return the path to the object or <CODE>null</CODE>
public Object[] getPathToRoot(Object node) {
return getPathToRoot(node, 0);
* Gets the path to the root node for the specified object.
* @param node the root node
* @param i the current index
* @return the path to the object or <CODE>null</CODE>
private Object[] getPathToRoot(Object node, int i) {
Object anode[];
if(node == null) {
if(i == 0) {
return null;
anode = new Object[i];
} else {
i++;
if(node == getRoot()) {
anode = new Object[i];
} else {
anode = getPathToRoot(getParent(node), i);
anode[anode.length - i] = node;
return anode;
* Gets the parent object of the specified object. This method is not
* part of the <code>javax.swing.tree.TreeModel</code> interface, but is
* required to support the <code>getPathToRoot(Object)</code> method,
* which is widely used in this class. Therefore, it is important to
* correctly implement this method.
* @param obj the object
* @parma the parent object or null if no parent or invalid object
protected abstract Object getParent(Object obj);
* Adds a listener for the <CODE>TreeModelEvent</CODE> posted after the
* tree changes.
* @param l the tree model listener
public void addTreeModelListener(TreeModelListener l) {
modelListeners.addElement(l);
* Removes a listener previously added with addTreeModelListener().
* @param l the tree model listener
public void removeTreeModelListener(TreeModelListener l) {
modelListeners.removeElement(l);
* Forces the tree to reload. This is useful when many changes occur
* under the root node in the tree structure.
* <b>NOTE:</b> This will cause the tree to be collapsed. To maintain
* the expanded nodes, see the <code>getExpandedPaths(JTree)</code>
* and <code>expandPaths(JTree, ArrayList)</code> methods.
* @see #getExpandedPaths(JTree)
* @see #expandPaths(JTree, ArrayList)
public void reload() {
reload(getRoot());
* Forces the tree to repaint. This is useful when many changes occur
* under a specific node in the tree structure.
* <b>NOTE:</b> This will cause the tree to be collapsed below the
* updated node.
* @param node the node that changed
public void reload(Object node) {
if(node != null) {
TreePath tp = new TreePath(getPathToRoot(node));
fireTreeStructureChanged(new TreeModelEvent(this, tp));
* Messaged when the user has altered the value for the item identified
* by <CODE>path</CODE> to <CODE>newValue</CODE>.
* @param path the path to the changed object
* @param newValue the new value
public void valueForPathChanged(TreePath path, Object newValue) {
nodeChanged(path.getLastPathComponent());
* Notifies the tree that nodes were inserted. The index is looked up
* automatically.
* @param node the parent node
* @param child the inserted child node
public void nodeInserted(Object node, Object child) {
nodeInserted(node, child, -1);
* Notifies the tree that nodes were inserted.
* @param node the parent node
* @param child the inserted child node
* @param index the index of the child
public void nodeInserted(Object node, Object child, int index) {
if(index < 0) {
index = getIndexOfChild(node, child);
if(node != null && child != null && index >= 0) {
TreePath tp = new TreePath(getPathToRoot(node));
int[] ai = { index };
Object[] ac = { child };
fireTreeNodesInserted(new TreeModelEvent(this, tp, ai, ac));
* Notifies the tree that nodes were removed. The index is required
* since by this point, the object will no longer be in the tree.
* @param node the parent node
* @param child the removed child node
* @param index the index of the child
public void nodeRemoved(Object node, Object child, int index) {
if(node != null && child != null && index >= 0) {
TreePath tp = new TreePath(getPathToRoot(node));
int[] ai = { index };
Object[] ac = { child };
fireTreeNodesRemoved(new TreeModelEvent(this, tp, ai, ac));
* Notifies the tree that a node was changed.
* @param node the changed node
public void nodeChanged(Object node) {
if(node != null) {
TreePath tp = new TreePath(getPathToRoot(node));
fireTreeNodesChanged(new TreeModelEvent(this, tp, null, null));
* Fires "tree nodes changed" events to all listeners.
* @param event the tree model event
protected void fireTreeNodesChanged(TreeModelEvent event) {
for(int i = 0; i < modelListeners.size(); i++) {
((TreeModelListener)modelListeners.elementAt(i)).treeNodesChanged(event);
* Fires "tree nodes inserted" events to all listeners.
* @param event the tree model event
protected void fireTreeNodesInserted(TreeModelEvent event) {
for(int i = 0; i < modelListeners.size(); i++) {
((TreeModelListener)modelListeners.elementAt(i)).treeNodesInserted(event);
* Fires "tree nodes removed" events to all listeners.
* @param event the tree model event
protected void fireTreeNodesRemoved(TreeModelEvent event) {
for(int i = 0; i < modelListeners.size(); i++) {
((TreeModelListener)modelListeners.elementAt(i)).treeNodesRemoved(event);
* Fires "tree structure changed" events to all listeners.
* @param event the tree model event
protected void fireTreeStructureChanged(TreeModelEvent event) {
for(int i = 0; i < modelListeners.size(); i++) {
((TreeModelListener)modelListeners.elementAt(i)).treeStructureChanged(event);
* Records the list of currently expanded paths in the specified tree.
* This method is meant to be called before calling the
* <code>reload()</code> methods to allow the tree to store the paths.
* @param tree the tree
* @param pathlist the list of expanded paths
public ArrayList getExpandedPaths(JTree tree) {
ArrayList expandedPaths = new ArrayList();
addExpandedPaths(tree, tree.getPathForRow(0), expandedPaths);
return expandedPaths;
* Adds the expanded descendants of the specifed path in the specified
* tree to the internal expanded list.
* @param tree the tree
* @param path the path
* @param pathlist the list of expanded paths
private void addExpandedPaths(JTree tree, TreePath path, ArrayList pathlist) {
Enumeration enum = tree.getExpandedDescendants(path);
while(enum.hasMoreElements()) {
TreePath tp = (TreePath)enum.nextElement();
pathlist.add(tp);
addExpandedPaths(tree, tp, pathlist);
* Re-expands the expanded paths in the specified tree. This method is
* meant to be called before calling the <code>reload()</code> methods
* to allow the tree to store the paths.
* @param tree the tree
* @param pathlist the list of expanded paths
public void expandPaths(JTree tree, ArrayList pathlist) {
for(int i = 0; i < pathlist.size(); i++) {
tree.expandPath((TreePath)pathlist.get(i));Hey
I'm not trying to show anyone up here, but having just built a tree model for displaying an XML document in a tree, I thought this seemed like a neat exercise.
I implemented this very differently from the @OP. I only have one class, HiddenNodeTreeModel. All the hidden node data is stored in the model itself in my class. The advantage of what I've created is it will work with any TreeModel. The disadvantage is that I think it's not going to be very scalable - the additional computing to get the number of child nodes and to adjust indexes is heavy. So if you need a scalable solution definitely don't use this.
Anyway here you go
HiddenNodeTreeModel.java
======================
package tjacobs.ui.tree;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JTree;
import javax.swing.event.TreeModelListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import tjacobs.ui.WindowUtilities;
public class HiddenNodeTreeModel implements TreeModel {
TreeModel mModel;
ArrayList<Object> mHidden = new ArrayList<Object>();
public HiddenNodeTreeModel (TreeModel model) {
mModel = model;
public void addTreeModelListener(TreeModelListener arg0) {
mModel.addTreeModelListener(arg0);
private ArrayList<Integer> getHiddenChildren(Object parent) {
ArrayList<Integer> spots = new ArrayList<Integer>();
Iterator _i = mHidden.iterator();
while (_i.hasNext()) {
Object hidden = _i.next();
int idx = mModel.getIndexOfChild(parent, hidden);
if (idx != -1) {
spots.add(idx);
return spots;
public Object getChild(Object arg0, int index) {
ArrayList<Integer> spots = getHiddenChildren(arg0);
Collections.sort(spots);
Iterator<Integer> _i = spots.iterator();
while (_i.hasNext()) {
int num = _i.next();
if (num <= index) {
index++;
return mModel.getChild(arg0, index);
public int getChildCount(Object arg0) {
ArrayList list = getHiddenChildren(arg0);
System.out.println("size = " + list.size());
return mModel.getChildCount(arg0) - list.size();
public int getIndexOfChild(Object arg0, Object arg1) {
int index = mModel.getIndexOfChild(arg0, arg1);
ArrayList<Integer> spots = getHiddenChildren(arg0);
Collections.sort(spots);
Iterator<Integer> _i = spots.iterator();
int toSub = 0;
while (_i.hasNext()) {
int num = _i.next();
if (num <= index) {
toSub++;
return index - toSub;
public Object getRoot() {
// TODO Auto-generated method stub
return mModel.getRoot();
public boolean isLeaf(Object arg0) {
// TODO Auto-generated method stub
return mModel.isLeaf(arg0);
public void removeTreeModelListener(TreeModelListener arg0) {
mModel.removeTreeModelListener(arg0);
public void valueForPathChanged(TreePath arg0, Object arg1) {
mModel.valueForPathChanged(arg0, arg1);
public void hideNode(Object node) {
if (node instanceof TreePath) {
node = ((TreePath)node).getLastPathComponent();
mHidden.add(node);
public void showNode(Object node) {
mHidden.remove(node);
public void showAll() {
mHidden.clear();
* @param args
public static void main(String[] args) {
// TODO Auto-generated method stub
DefaultMutableTreeNode A = new DefaultMutableTreeNode("A");
DefaultMutableTreeNode B = new DefaultMutableTreeNode("B");
DefaultMutableTreeNode C = new DefaultMutableTreeNode("C");
DefaultMutableTreeNode D = new DefaultMutableTreeNode("D");
DefaultMutableTreeNode E = new DefaultMutableTreeNode("E");
DefaultMutableTreeNode F = new DefaultMutableTreeNode("F");
A.add(B);
B.add(C);
B.add(D);
B.add(E);
E.add(F);
DefaultTreeModel model = new DefaultTreeModel(A);
final HiddenNodeTreeModel hmodel = new HiddenNodeTreeModel(model);
final JTree tree = new JTree(hmodel);
JFrame jf = new JFrame("HiddenNodeTreeModel Test");
jf.add(tree);
JMenuBar bar = new JMenuBar();
jf.setJMenuBar(bar);
JMenu menu = new JMenu("Options");
bar.add(menu);
final JMenuItem hide = new JMenuItem("Hide");
final JMenuItem show = new JMenuItem("ShowAll");
menu.add(hide);
menu.add(show);
ActionListener al = new ActionListener() {
public void actionPerformed(ActionEvent ae) {
if (ae.getSource() == hide) {
hmodel.hideNode(tree.getSelectionPath());
tree.updateUI();
else {
hmodel.showAll();
tree.updateUI();
hide.addActionListener(al);
show.addActionListener(al);
jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jf.setBounds(100,100,100,100);
jf.setVisible(true);
} -
Firefox 6.0.1 runs OK on start up but as the day goes by gets slower and slower.
Running Windows XP on Toshiba Equim A110. Since upgrading to Firefox 6.0.1, Firefox has been very frustrating to use. As the day progresses after booting up, Firefox becomes increasingly slow. For exmple opening a new tab can take 80 secs. Shutting down Firefox at the end of the day can take many minutes.
'''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode]''' {web link}
While you are in safe mode;
Press the '''Alt''' or '''F10''' key to bring up the tool bar.
Followed by;
Windows; '''Tools > Options'''
Linux; '''Edit > Preferences'''
Mac; ''application name'' '''> Preferences'''
Then '''Advanced > General.'''
Look for and turn off '''Use Hardware Acceleration'''.
Poke around safe web sites. Are there any problems?. Then restart. -
After,using,CS,for,one,year,I,must,have,an,activation,code,,the,trial,version,will,be,end, over,25,days.,How,is,it,possible?,What,can,I,do?
Was the iPad originally set up on a different computer, and hasn't been synced to the one that you are now trying to use ? There are some instructions on this page for syncing to a new computer : https://discussions.apple.com/docs/DOC-3141
(Before trying that you could copy any important files/documents off the iPad so that you have you own backup copy of them e.g. depending upon what the apps support then email them to yourself, use Dropbox, copy them to your computer via your wifi-network.)
You should be able to copy iTunes purchases off the iPad and over to that computer's iTunes via File > Devices Transfer Purchases, but if you have music from other sources (e.g. copied from CDs) which aren't in that computer's iTunes (and you haven't got a backup to copy them onto it from) then there are some programs listed half-way down this page which should be able to copy them back : https://discussions.apple.com/docs/DOC-3991
For recovery mode, that will result in your iPad being put back to factory defaults i.e. all of your content will be removed from it -
How can I turn off the "Free Subscription is ending in X days pop-up. I bought my subscription but still receive the notice.
Hi Carl,
Is it the Acrobat trial that's ending? (Adobe doesn't offer free subscriptions that expire after a set time.)
If you're referring to the Acrobat trial, have you logged in with your Adobe ID and password? If not, click License this Software in the pop-up that states the trial is ending soon, and then log in with your credentials, and you should be set.
Please let us know if that is not the case.
Best,
Sara -
i just brought a apple protection plan as my phone warranty is going to end in a day, after entering the protection plan code and my phone serial no its showing an error message "technical error try after some time", is there any solution for that?
As i need the warranty to extend for another year please help me regarding this issue.
When i bought a new iphone5 in Inda after using it for three days lock button was not working properly and it was warranty claimed and exchanged from apple service center in India, for the same phone I want to extend the warranty but its showing a error message is there any solution?Here is some information on the applecare +:
http://www.apple.com/support/products/iphone.html
It appears that you have to buy the applecare within 30 days of buying your phone - you said that your phone warranty is almost over, so when did you buy it??? That could be the explanation for the error. -
I got a text saying that I don't pay my bill, my service is going to get cut off by the end of the day. I don't have the funds to pay it in full, so I paid half the amount. Would that suffice? Or would I have to pay it in its entirety to save my service from being cut off?
As it was pointed out making prior arrangements could of helped extend the time you need to get your account back in order..
But if you have to have the phone and its the only thing you have to make calls, I would try other means ( Family, Friends, or other ) to get the rest of the balance payed and you can pay at a Corporate store using the stores Kiosk machine.! You can pay with Cash, Credit or I think with a check but using a check I'd ask the Local store how the policy is on that..
Hope that Helps.! Good luck.. -
Camileo X100 freezes using remote at the end of clip
I bought a Toshiba Camileo X100 a few days ago.
The camera is great, I like it very much.
However, there is a problem with the firmware I think.
The remote control is functioning, as expected, although there is no detail about its usage in the manual, I had to guess everything.
The problem is the following. If you go with the remote to play a clip, you wait for the end of the clip, and would like to go back to the previous screen, you press the Back/Cancel button on the remote (right bottom button).
If you do this, the camera freezes.
You have to switch it off and switch it on again to be able to use it.
The bug was confirmed by HRP Hungary (distributor and service in Hungary), we tested it together over the phone, so it should not be the problem of my specific camera.
What could you advise me on this?
The following issues are not bugs, but during playback it would be useful to be able to see somehow the details of the clips recorded (at least the time of the recording), and to be able to set some settings for recording, so that the camera does not forget everything at turning off (e.g. stabilization, or pre rec setting etc.).
Why do you have to have the screen open, when you are shooting a time lapse for a few hours, or during playback on TV?
THX for any help.Hi there,
THX for checking. I also sent a letter to Toshiba, first they wanted to replace the camera, then I explained again that the replacement will work the same way, no answer since then.
What I ment during playback, is some information about the clips, e.g. the time, when the recording was made. Currently you only see the number of the file and the total number of files in the list, and the length + the number of the files when you are on one file. On other cameras you see the length, the time of the recording, the settings used. On Camileo X100, you see only the length and the basic setting, but no data on the time of the recording, or other metadata (e.g. stabilization focus...). It is not a bug, but would have been useful. -
Campus Tours sites of the day - how do they use Captivate?
Hello,
I'm new to Captivate and am still figuring out which situations it might be easier to use it rather than building something in Flash. I can see that quizzes, screen-casts and scenarios are obvious places. But I've also been looking at the first two 'Site of the Day' examples in the Adobe Captivate showcase (the campus tours of AI Philadelphia and Berklee College of Music) and I can't see how they would have used Captivate to produce them.
The examples are both very nice promotional presentations about universities and they look great - nice internal popups with videos, images etc. I understand that you could build widgets to provide these kind of features but I don't understand what the benefit would then be of importing these in to Captivate rather than just building it in Flash. Am I missing something obvious? Do people use Captivate for storyboarding and then move into Flash?
Any advise would be appreciated. I do love Captivate so far but am not sure how to put it to use most effectively.It depends how fancy you want to get.
The easiest way to achieve this is to do as you currently have, but set the On Exit action for the final slide in each group to jump back to the Menu slide.
In order to give the user the option of continuing on to the next slide, you can place a button on the final slide of each group and set it's action to jump to the first slide of the next group. You need to set up some variables and Advanced Actions to show/hide this button depending on whether or not the user has clicked the button on the menu to view all slides. If they've just clicked the button for a particular group, the Continue button remains hidden and they'll be jumped back to the menu. The disadvantage of this method is that it requires the user to click something at the end of each group to continue to the next.
If you want the user make their choice on the menu slide to play all sections one after the other, and then to be seamlessly taken to each new group without clicking anything, then you need to get slightly fancier with your Variables and Advanced Actions. Basically, On Exit of the final slide in each group, instead of the action to jump back to the menu, you need to have it perform a check to see what the value of the variable is that determines whether to continue or not. If the variable is 1 (to indicate continuous play), then it will jump to the beginning slide of the next group. If the variable is 0, then it should jump back to the menu.
If you're unfamiliar with Captivate Advanced Actions and user variables, this is your opportunity to learn! -
i am using numbers in the new iWork. Just bought it 10 days back. I am not able to figure out how to add serial umbers from 1 to 100( for example) also i need to freeze the top header like in windows so that we can browse down without the heading going off. Can some one help?
Hi Jay,
Be aware that "Freeze Header Rows" and "Freeze Header Columns" apply only to rows and columns that are Header rows or Header columns. You can have up to five Header rows, Five Header Columns (and five Footer rows) on a Numbers Table.
"Header rows" is a special designation. Besides being able to be frozen, Header and Footer rows are not included in formulas referencing whole columns, making it possible to place formulas such as =SUM(B) at the top (or bottom) of column B without causing a self-reference error, These designated rows are also not included in sorts of the rows in a table.
Regards,
Barry -
Occasionally I have the problem discussed in /forums/knowledge-base-articles/704725 , Firefox is already running. My only fix is to use Task Manager to end the firefox process. At such tmes, I have no other instances running.
'''https://support.mozilla.org/questions/997866?esab=a&s=&r=1&as=s'''.<BR>
This is not a cure but will make it easier if Firefox locks up. -
Hi folks
Had iPhone for a while and generally happy, but it seems I still need to keep my old nokia E72 because I cannot seem to use the iPhone as a modem, nor does it support rSAP.
Also, while I like the threaded sms view, I'd also like the option to create sms folders to stash away my banking sms info, all of which comes from different numbers, and filled the sms inbox with hundreds of messages.
Lastly, having the meeting for the day diplayed somewhere on the home screen would be great if there were a way to do it. Yes, I can go into calender easy enough, but unless I develop the habit of checking it all the time, I often forget about a meeting whereas on the old nokia, it was always displayed.
What gives with the lack of flash support? Maybe ol Steve dislikes adobe, but it seems like a serious lack to me. Even the old nokia has some flash support.
Given that, I must say I love the seperate calenders and contacts. It's great to be able to keep home contacts seperate from work ones, but still have them on the same phone. Email is great two - full html support seems like a given but it works really well.rSAP has largely been supplanted by ABAP, which the iPhone supports. Most modern smartphones, including the iPhone do NOT store any information on the SIM.
SMS inboxes. Not much to say. I've never had a desire to do this. I understand it could be useful, but it's unlikely to change.
As for meetings on the home screen... Wait for iOS 5
Flash: it's not JUST that Steve doesn't like flash. Adobe has failed to produce a workable version of Flash for iOS. Blame has to go to both sides. I say good riddance to it.
Maybe you are looking for
-
Aging report of vendor and ekorg related amount
Hi, My requirement is for vendor 122 within certain period for certain ekorg-c100 and D100 show different amount. is it possible for vendor aging report. I developed a vendor aging report for displaying comp-code, vendor, Pur-org, Total-amount, month
-
Customize R12 java copncurrent program for RTFCheck Printing through ORACLE
This is related to R12 check printing using RTF BI publisher. In R12 we have the xml file genrerated out of the Java concurrent program.We want to add couple of new fields..For example there is a ALTERNATE SITE NAME required by the customer.I want to
-
Hi, I am trying to access some data in my structure CRMA_PARTNER. On doing this i am getting an error: Field CRMA_PARTNER-PARTNER_NO is unknown. Following is my code: method INIT_CHANGEHISTORY. DATA: lr_ent TYPE REF TO if_bol_bo_property_access, ls_a
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Object Level and Folder Level Instances Limit on R3?
Hi there, We've been thinking about setting a global limit on instances of 35, but were wondering if we can apply a limit of 50 only on certain reports? This is only for reports where the business has justified that they will need to go over that. Ba
-
Switch audio tracks from left to right
Is it possible to take the left audio track and put in on the right track? I have a clip that only has audio on the left track. I cannot recapture. So, I want to know if I duplicate the audio and then on the duplicate switch the left and right. I kno