Initialiazing Mechanism Codes for Java?
Hi, I am wanting to know there's any java code to initate a program from a removeable drive(i.e:thumbdrive) once I dragged and drop a word document from C:\ to F:\?
Short answer - probably not.
The behavior you describe would require very platform-dependent code and I wonder if that is what a user would expect if they simply dropped a document onto a drive (thumb or not). It would involve subscribing to OS and filesystem events in Java, detecting the presence of a thumb-drive (not sure how) and then registering for filesystem events that indicate that a file has been created on the drive and launching the appropriate program or having the monitoring code do the work.
If it were me, I'd probably do sch things in the platform's favorite language (C, C++, C#) and invoke my Java process from there.
Chuck
Similar Messages
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How do I rewrite current code for java 1.3
I'm using the code below that is written for java 1.4. I have been told that the company can not push JRE 1.4 to the company, and that I need to write my code for java 1.3. I'm using org.w3c.dom for my create xml, etc.
Is there a java 1.3 option to the 1.4? Any help would be very appreciated.
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.util.List;
import java.io.*;
import java.util.*;
import javax.xml.parsers.*;
import javax.xml.transform.*;
import javax.xml.transform.dom.*;
import javax.xml.transform.stream.*;
import org.w3c.dom.*;
public class Sametime extends JFrame implements ActionListener {
private int indentation = -1;
JPanel panel = new JPanel();
JTextArea jta = new JTextArea(
//Instructions for user
"For a successful buddy list migration do the following:\n"
+ "1. Save your current Sametime Buddy List to your PC.\n "
+ "The default location should be: C:/Program Files/Lotus/Sametime Client.\n"
+ " A. Open the Sametime Client.\n"
+ " B. Click on People\n"
+ " C. Click on Save List.\n"
+ " D. Save as your first.last.dat\n"
+ " Ex. john.doe.dat\n"
+ "NOTE: If you have AOL contacts in your Sametime buddy list they will not be migrated.\n");
JButton browse = new JButton("Continue");
JButton exit = new JButton("Exit");
public Sametime() {
super("Sametime Buddy List Migration");
setSize(610, 245);
Container c = this.getContentPane();
c.add(panel);
browse.addActionListener(this);
exit.addActionListener(this);
panel.add(jta);
panel.add(browse);
panel.add(exit);
jta.setEditable(false);
setLookAndFeel();
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
} //end Sametime
public class DATFilter extends javax.swing.filechooser.FileFilter {
public boolean accept(File f) {
//if it is a directory -- we want to show it so return true.
if (f.isDirectory())
return true;
String extension = getExtension(f);//get the extension of the file
//check to see if the extension is equal to "dat"
if ((extension.equals("dat")))
return true;
//default -- fall through. False is return on all
//occasions except:
//a) the file is a directory
//b) the file's extension is what we are looking for.
return false;
}//end accept
public String getDescription() {
return "dat files";
}//end getDescription
* Method to get the extension of the file, in lowercase
private String getExtension(File f) {
String s = f.getName();
int i = s.lastIndexOf('.');
if (i > 0 && i < s.length() - 1)
return s.substring(i+1).toLowerCase();
return "";
}//end getExtension
}//end class DATFilter
public void actionPerformed(ActionEvent e) {
//Default Location for JFileChooser search
String error = "The file selected is not a .dat file!\n"
+ "Please select your recently saved .dat file and try again.";
JFileChooser fc = new JFileChooser("/Program Files/Lotus/Sametime Client");
fc.setFileFilter(new DATFilter());
fc.setFileSelectionMode( JFileChooser.FILES_ONLY);
String user = System.getProperty("user.name");// finds who the current user is
if (e.getSource() == browse) {
int returnVal = fc.showSaveDialog(Sametime.this);
if (returnVal == JFileChooser.APPROVE_OPTION) {
//if (fc.getSelectedFile().getName().equals(".dat")){
if (fc.getSelectedFile().getName().endsWith(".dat")){ // checks to see if selected file is .dat
}else{
JOptionPane.showMessageDialog(null, error, "Wrong File", JOptionPane.ERROR_MESSAGE);
return;
}//end else
try {
String[] contactArray = parseDatFile(fc.getSelectedFile());
Document document = createXMLDocument(contactArray);
saveToXMLFile(
document,
new File(
"C:/Documents and Settings/" + user +"/My Documents/OLCS/",// looks for directory for list
"contacts-list_migration.ctt"));
} catch (Exception exc) {
File f = new File("C:/Documents and Settings/" + user +"/My Documents/OLCS/");// setting directory for list if not there
boolean yes = true;
yes = f.mkdir();// creating directory
try {
String[] contactArray = parseDatFile(fc.getSelectedFile());
Document document = createXMLDocument(contactArray);
saveToXMLFile(
document,
new File(
"C:/Documents and Settings/" + user +"/My Documents/OLCS/",// used only if the directory didn't exist
"contacts-list_migration.ctt"));
//exc.printStackTrace();// not sure if this is needed?
} catch (Exception exc1) {
exc1.printStackTrace();
}//end inner catch
}// end catch
}// end if
if(returnVal==JFileChooser.CANCEL_OPTION){
String Warning = "You did not migrate your Sametime buddy list at this time.";
JOptionPane.showMessageDialog(null, Warning, "Migration Canceled", JOptionPane.WARNING_MESSAGE);
return;
}else{
String thankyou = "Thank You for Migrating your Sametime buddy list to OLCS"
+ "\nYour new OLCS buddy list has been saved to:"
+ "\nC:/Documents and Settings/" + user +"/My Documents/OLCS"
+ "\n as: Contact-List_migration.ctt"
+ "\n\n To be able to use Contact-List_migration.ctt for Windows Messenger:"
+ "\n1. Log into Windows Messenger."
+ "\n2. Click on File"
+ "\n3. Click on 'Import Contacts from a Saved File...'"
+ "\n4. Open OLCS in My Documents"
+ "\n5. Click on 'Contact-list_migration.ctt'"
+ "\n6. Click Open to import the list."
+ "\n A window will pop up confirming that you want to add all of the contacts"
+ "\n Click 'yes'"
+ "\n Your buddy list is ready to be used.";
JOptionPane.showMessageDialog(null, thankyou, "Migration Completed", JOptionPane.INFORMATION_MESSAGE);//Change this when defualt directory is known.
}//end if else statement
} //end if
System.exit( 0 );
if (e.getSource() == exit) {
System.exit( 0 );
} //end if
} //end actionPerformed
String[] parseDatFile(File datFile)
throws Exception {
List list = new ArrayList();
BufferedReader br = new BufferedReader(new FileReader(datFile));
String line;
while ((line = br.readLine()) != null) {
line = line.trim();
if (line.indexOf("U") != 0)
continue;
int p = line.indexOf("::");
if (p == -1)
continue;
line = line.substring(p + 2).trim();
if (line.indexOf("AOL") == 0)
continue;
p = line.indexOf(",");
if (p != -1)
line = line.substring(0, p);
line = line.trim() + "@mci.com";
if (list.indexOf(line) == -1)
list.add(line);
}//end while
br.close();
String[] contactArray = new String[list.size()];
list.toArray(contactArray);
return contactArray;
}// end String
// setting up the XML file
Document createXMLDocument(String[] contactArray) throws Exception {
DocumentBuilderFactory dBF = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = dBF.newDocumentBuilder();
DOMImplementation domImpl = builder.getDOMImplementation();
Document document = domImpl.createDocument(null, "messenger", null);
Element root = document.getDocumentElement();
Element svcElm = document.createElement("service");
Element clElm = document.createElement("contactlist");
svcElm.setAttribute("name", "Microsoft RTC Instant Messaging");
svcElm.appendChild(clElm);
root.appendChild(svcElm);
for (int i = 0; i < contactArray.length; i++) {
Element conElm = document.createElement("contact");
Text conTxt = document.createTextNode(contactArray);
conElm.appendChild(conTxt);
clElm.appendChild(conElm);
}//end for
return document;
}// end Document
void saveToXMLFile(Document document, File xmlFile) throws Exception {
OutputStream os =
new BufferedOutputStream(new FileOutputStream(xmlFile));
TransformerFactory tFactory = TransformerFactory.newInstance();
Transformer transformer = tFactory.newTransformer();
transformer.setOutputProperty(OutputKeys.INDENT, "yes");//puts information on seperate lines
transformer.setOutputProperty(OutputKeys.METHOD, "xml");
transformer.setOutputProperty("{http://xml.apache.org/xslt}indent-amount", "2");//gives the XML file indentation
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "no");
DOMSource source = new DOMSource(document);
StreamResult result = new StreamResult(os);
transformer.transform(source, result);
os.close();
}//end saveToXMLFile
public static void main(String[] args) {
Sametime st = new Sametime();
ImageIcon picIcon = new ImageIcon(st.getClass().getResource("/images/mci.gif"));//Change when default is known!
st.setIconImage(picIcon.getImage());
} //end main
private void setLookAndFeel() {
try {
UIManager.setLookAndFeel(
UIManager.getSystemLookAndFeelClassName());
SwingUtilities.updateComponentTreeUI(this);
} catch (Exception e) {
System.err.println("Could not use Look and Feel: " + e);
} //end catch
} //end void setLookAndFeel
} //end public class SametimeAre there features of Java 1.4 that you specifically took advantage and are there any particular lines you are having problems with or did you just freak and post it here?
Basically compile it under Java 1.3 and see what complains. I've done several projects that compile under 1.2, 1.3, and 1.4. -
Tips on how to write efficient java code for java mapping
hi
I do not have much knowledge in Java
Can anybody tell me some tips on how to write efficient and optimised java code to be used in java mapping
Thanks,
Loveenahi D'za,
JAVA in xi
A very important place where you will use JAVA in XI is while doing your Mapping. There will be cases when JAVA MAPPING is the best solution to go for. There are 2 types of Parsers available for JAVA Mapping. DOM Parser and SAX parser. Just got through the following links to understand more on Java Mapping and the APIs available.http://java.sun.com/j2se/1.4.2/docs/api/javax/xml/parsers/package-summary.html http://java.sun.com/j2se/1.4.2/docs/api/org/w3c/dom/Document.html http://java.sun.com/j2se/1.4.2/docs/api/org/w3c/dom/package-frame.html /people/prasad.ulagappan2/blog/2005/06/29/java-mapping-part-i
/people/prasad.ulagappan2/blog/2005/06/29/java-mapping-part-ii /people/prasad.ulagappan2/blog/2005/06/29/java-mapping-part-iii
JAVA mapping -
/people/prasad.ulagappan2/blog/2005/06/29/java-mapping-part-i /people/prasad.ulagappan2/blog/2005/06/29/java-mapping-part-ii /people/prasad.ulagappan2/blog/2005/06/29/java-mapping-part-iii /people/ravikumar.allampallam/blog/2005/06/24/convert-any-flat-file-to-any-idoc-java-mapping /people/amol.joshi2/blog/2006/03/10/think-objects-when-creating-java-mappings /people/sameer.shadab/blog/2005/09/29/testing-abap-mapping
sample code for java mapping
Re: Example code DOM PARSER API -
http://java.sun.com/j2se/1.4.2/docs/api/org/w3c/dom/package-frame.html DOM --- /people/thorsten.nordholmsbirk/blog/2006/08/10/using-jaxp-to-both-parse-and-emit-xml-in-xi-java-mapping-programs tutorial sax and dom
For a tutorial on the methods of SAX and DOM http://java.sun.com/webservices/docs/1.1/tutorial/doc/
SAX AND dom PARSER ( BY thorsten) -
example /people/thorsten.nordholmsbirk/blog/2006/08/10/using-jaxp-to-both-parse-and-emit-xml-in-xi-java-mapping-programs java mapping example ( testing and debugging) /people/stefan.grube/blog/2006/10/23/testing-and-debugging-java-mapping-in-developer-studio
regards
biplab
Use a Good Subject Line, One Question Per Posting - Award Points -
New to Programming, need your help with writing code for java in Xcode.
Hey everyone! Sorry if I sound like a total idiot here with a bunch of developers but I could really use your help. I am in college and having a bit of problems with my intro to programming class. The class is entirely Java based and so, after having to use dos windows on my grandpas crappy laptop I found out about xcode. I downloaded and installed it but I am having problems seeing where exactly it is that I am to write my code for a normal java application. Any help would be greatly appreciated! I wrote it on the bottom of a bunch of code that looked strange to me. For relatively simple java programs I chose the java application template. Is there something here that I missed?
The Java Application project template looks like it sets up an application and some kind of starting UI using Swing/AWT. I didn't look at it too indepth, but if you are in an introductory course this might be more than you need to complete your assignments. There doesn't seem to be blank Java template, so I don't know what you should use. Perhaps just a blank project you add your .java files to.
To answer where to write code, you would write it in your .java files under the /src folder. Execution begins in
public static void main(String args[]) {}
in YourAppName.java, then creates an object based on your application class, and runs the code from there to display the UI. -
Example code for java compiler with a simple GUI
There is no question here (though discussion of the code is welcome).
/* Update 1 */
Now available as a stand alone or webstart app.! The STBC (see the web page*) has its own web page and has been improved to allow the user to browse to a tools.jar if one is not found on the runtime classpath, or in the JRE running the code.
* See [http://pscode.org/stbc/].
/* End: Update 1 */
This simple example of using the JavaCompiler made available in Java 1.6 might be of use to check that your SSCCE is actually what it claims to be!
If an SSCCE claims to display a runtime problem, it should compile cleanly when pasted into the text area above the Compile button. For a compilation problem, the code should show the same output errors seen in your own editor (at least until the last line of the output in the text area).
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.EventQueue;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JLabel;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.SwingWorker;
import javax.swing.border.EmptyBorder;
import java.util.ArrayList;
import java.net.URI;
import java.io.ByteArrayOutputStream;
import java.io.OutputStreamWriter;
import javax.tools.ToolProvider;
import javax.tools.JavaCompiler;
import javax.tools.SimpleJavaFileObject;
/** A simple Java compiler with a GUI. Java 1.6+.
@author Andrew Thompson
@version 2008-06-13
public class GuiCompiler extends JPanel {
/** Instance of the compiler used for all compilations. */
JavaCompiler compiler;
/** The name of the public class. For 'HelloWorld.java',
this would be 'HelloWorld'. */
JTextField name;
/** The source code to be compiled. */
JTextArea sourceCode;
/** Errors and messages from the compiler. */
JTextArea output;
JButton compile;
static int pad = 5;
GuiCompiler() {
super( new BorderLayout(pad,pad) );
setBorder( new EmptyBorder(7,4,7,4) );
/** A worker to perform each compilation. Disables
the GUI input elements during the work. */
class SourceCompilation extends SwingWorker<String, Object> {
@Override
public String doInBackground() {
return compileCode();
@Override
protected void done() {
try {
enableComponents(true);
} catch (Exception ignore) {
/** Construct the GUI. */
public void initGui() {
JPanel input = new JPanel( new BorderLayout(pad,pad) );
Font outputFont = new Font("Monospaced",Font.PLAIN,12);
sourceCode = new JTextArea("Paste code here..", 15, 60);
sourceCode.setFont( outputFont );
input.add( new JScrollPane( sourceCode ),
BorderLayout.CENTER );
sourceCode.select(0,sourceCode.getText().length());
JPanel namePanel = new JPanel(new BorderLayout(pad,pad));
name = new JTextField(15);
name.setToolTipText("Name of the public class");
namePanel.add( name, BorderLayout.CENTER );
namePanel.add( new JLabel("Class name"), BorderLayout.WEST );
input.add( namePanel, BorderLayout.NORTH );
compile = new JButton( "Compile" );
compile.addActionListener( new ActionListener() {
public void actionPerformed(ActionEvent ae) {
(new SourceCompilation()).execute();
input.add( compile, BorderLayout.SOUTH );
this.add( input, BorderLayout.CENTER );
output = new JTextArea("", 5, 40);
output.setFont( outputFont );
output.setEditable(false);
this.add( new JScrollPane( output ), BorderLayout.SOUTH );
/** Compile the code in the source input area. */
public String compileCode() {
output.setText( "Compiling.." );
enableComponents(false);
String compResult = null;
if (compiler==null) {
compiler = ToolProvider.getSystemJavaCompiler();
if ( compiler!=null ) {
String code = sourceCode.getText();
String sourceName = name.getText().trim();
if ( sourceName.toLowerCase().endsWith(".java") ) {
sourceName = sourceName.substring(
0,sourceName.length()-5 );
JavaSourceFromString javaString = new JavaSourceFromString(
sourceName,
code);
ArrayList<JavaSourceFromString> al =
new ArrayList<JavaSourceFromString>();
al.add( javaString );
ByteArrayOutputStream baos = new ByteArrayOutputStream();
OutputStreamWriter osw = new OutputStreamWriter( baos );
JavaCompiler.CompilationTask task = compiler.getTask(
osw,
null,
null,
null,
null,
al);
boolean success = task.call();
output.setText( baos.toString().replaceAll("\t", " ") );
compResult = "Compiled without errors: " + success;
output.append( compResult );
output.setCaretPosition(0);
} else {
output.setText( "No compilation possible - sorry!" );
JOptionPane.showMessageDialog(this,
"No compiler is available to this runtime!",
"Compiler not found",
JOptionPane.ERROR_MESSAGE
System.exit(-1);
return compResult;
/** Set the main GUI input components enabled
according to the enable flag. */
public void enableComponents(boolean enable) {
compile.setEnabled(enable);
name.setEnabled(enable);
sourceCode.setEnabled(enable);
public static void main(String[] args) throws Exception {
Runnable r = new Runnable() {
public void run() {
JFrame f = new JFrame("SSCCE text based compiler");
f.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
GuiCompiler compilerPane = new GuiCompiler();
compilerPane.initGui();
f.getContentPane().add(compilerPane);
f.pack();
f.setMinimumSize( f.getSize() );
f.setLocationRelativeTo(null);
f.setVisible(true);
EventQueue.invokeLater(r);
* A file object used to represent source coming from a string.
* This example is from the JavaDocs for JavaCompiler.
class JavaSourceFromString extends SimpleJavaFileObject {
* The source code of this "file".
final String code;
* Constructs a new JavaSourceFromString.
* @param name the name of the compilation unit represented
by this file object
* @param code the source code for the compilation unit
represented by this file object
JavaSourceFromString(String name, String code) {
super(URI.create(
"string:///" +
name.replace('.','/') +
Kind.SOURCE.extension),
Kind.SOURCE);
this.code = code;
@Override
public CharSequence getCharContent(boolean ignoreEncodingErrors) {
return code;
}Edit 1:
Added..
f.setMinimumSize( f.getSize() );Edited by: AndrewThompson64 on Jun 13, 2008 12:24 PM
Edited by: AndrewThompson64 on Jun 23, 2008 5:54 AMkevjava wrote: Some things that I think would be useful:
Suggestions reordered to suit my reply..
kevjava wrote: 2. Line numbering, and/or a line counter so you can see how much scrolling you're going to be imposing on the forum readers.
Good idea, and since the line count is only a handful of lines of code to implement, I took that option. See the [line count|http://pscode.org/stbc/help.html#linecount] section of the (new) [STBC Help|http://pscode.org/stbc/help.html] page for more details. (Insert plaintiff whining about the arbitrary limits set - here).
I considered adding line length checking, but the [Text Width Checker|http://pscode.org/twc/] ('sold separately') already has that covered, and I would prefer to keep this tool more specific to compilation, which leads me to..
kevjava wrote: 1. A button to run the code, to see that it demonstrates the problem that you wish for the forum to solve...
Interesting idea, but I think that is better suited to a more full blown (but still relatively simple) GUId compiler. I am not fully decided that running a class is unsuited to STBC, but I am more likely to implement a clickable list of compilation errors, than a 'run' button.
On the other hand I am thinking the clickable error list is also better suited to an altogether more abled compiler, so don't hold your breath to see either in the STBC.
You might note I have not bothered to update the screenshots to show the line count label. That is because I am still considering error lists and running code, and open to further suggestion (not because I am just slack!). If the screenshots update to include the line count but nothing else, take that as a sign. ;-)
Thanks for your ideas. The line count alone is worth a few Dukes. -
MSS - where find code for java iviews and how to copy and extract??????
Hi All,
Not sure if this is the correct forum, so if i'm in the wrong place apologies and if possible could you point me in the right direction. If I am in the right place, here it goes......
we're using R/3 4.7, MSS 6.1.20. We're just beginning to implement MSS. I'm wondering if anyone could give me a couple of examples of which MSS options are based on java iviews, where is the code for these java ivews stored on the system and do i have to do anything special to extract this code.
the reason i want the code is that i want to copy it and see how difficult it is to make changes to the code in netweaver developer studio.
Also, as i'm new to all this, if anyone knows of a good source of info for java iview creation/manipulation, please let me know.
Kind regards,
Liz.Hi,
This is how we access java code for ESS applications. I hope it is the same for MSS as well.
Open your NWDS -> Window -> Preferences -> Java Development Infrastructure -> Development Configurations.
Provide the Landscape directory server in URL field. something like http://<server name>:<port number>. Ping and confirm the connections. Save the settings.
Now select Window -> Open Perspective -> Development Configurations.
Right click on the Offline and select Import configurations. Select remote option and import the respective items from the server. Create a project for the required inactive DC and you will be able to edit the code in webdynpro perspective.
Hope this helps.
Thanks,
Preetham -
Need to find the source code for java.util.LinkedList
Hello all,
I'm new to the forums and I actually need the LinkedList source file as well as all the source files for all Java packages and libraries. Please post a link here if you can, or email me at [email protected]
Thanks again!
copter_manBut those must be platform dependant, not really that
interesting to look at. I have never felt any need to
look at those at least.Wake up and smell the coffee, abbie! I read the source code all the time and constantly tell my students to do that, too.
1. Java source code is not platform dependent. The original poster wanted to look at linked list code, how could that be platform dependent?
2. It is the implementation of the SDK APIs, so by definition it is implementation dependent code, liable to change in a later version. So don't assume anything beyond what is claimed in the API documentation. However, sometimes the documentation is incomplete or ambiguous to you, and reading the source can provide some insight, however implementation dependent. (Light a candle or curse the darkness.)
3. Why read source code? It's a good way to learn how to program. You see something in the API and ask: how'd they do that? Or you realize you want to do something broadly similar, but you can't reuse the source code.
For example, Images are not Serializable, but suppose you want a small image that is part of an object to be serialized with the rest of the object without too much fuss (ie, without using javax.imageio). You notice ImageIcon is serializable, so you use it. (An ImageIcon has-an Image.) Then you wonder: how'd they do that? You read the source and then you know.
You live, you learn,
Nax -
Where to see the source code for Java library?
I need to know how the defaultWriteObject() of Hashtable is written. Anybody has any clue? Thanks a lot.
SoccerIf you have no tool, you can write your own tool:
import java.util.zip.*;
import java.io.*;
public class ZipTest {
public static void main(String[] args) {
if(args.length != 2) {
System.err.println("using: java ZipTest [zip file] [target directory]");
System.exit(1);
String sourceFilename = args[0];
String targetDirectory = args[1];
new ZipTest().unzip(sourceFilename, targetDirectory);
public void unzip(String sourceFilename, String targetDirectory) {
String fileSeparator = System.getProperty("file.separator");
if(! targetDirectory.endsWith(fileSeparator)) {
targetDirectory += fileSeparator;
try {
ZipFile zipFile = new ZipFile(sourceFilename);
java.util.Enumeration entries = zipFile.entries();
while(entries.hasMoreElements()) {
ZipEntry entry = (ZipEntry)entries.nextElement();
if(entry.isDirectory()) {
continue;
String name = entry.getName();
name = targetDirectory + name;
System.out.println(name);
File file = new File(name);
File directory = file.getParentFile();
if(! directory.exists()) {
directory.mkdirs();
BufferedInputStream bis = new BufferedInputStream(
zipFile.getInputStream(entry));
BufferedOutputStream bos = new BufferedOutputStream(
new FileOutputStream(file));
byte[] b = new byte[1024];
int count = 0;
while((count = bis.read(b, 0, 1024)) != -1) {
bos.write(b, 0, count);
bis.close();
bos.close();
zipFile.close();
} catch(java.io.IOException e) {
System.err.println(e);
} -
I was wondering if any of you guys also use or know TEXTPAD ? If yes, what do you guys think of it ? Does textpad good or suitable for writing and compiling codes for Java ?
Thanks !Does it good, or no ?Yes, it's excellent. As a tool to use when learning Java it cannot be beaten, and subsequently it is still just great. I would encourage you to purchase a full licence.
When you compile bigger
programs, does textpad still works ?Sure. Although once you are very familiar with the tools of Java development (particularly javac and java) then you will probably want to pick up an IDE to use instead of Textpad. That won't stop Textpad from being useful.
What are the
disadvantages of it ?It's not an IDE, just a text editor with some programmer oriented features. That's also one of its advantages.
And what do you usually use to
write Java code ?For short examples I still use Textpad. For viewing code in an ad hoc manner, I still use Textpad. For writing large applications I use Eclipse 3.1M7 where possible and (usually) WebSphere Application Developer where not.
Dave. -
What's the code for working Powers (in Maths)
something like 2x2x2x2x2 = 2^5
but what's the code for java???? is it 2^5 like VB or different????You guys are too damn smart. Would you be so kind to tell that to my wife because she doesn't believe me anymore after she found
the kitchen floor covered with sticky banana-chocolate melted icecream from a box I'd forgotten all
about after I left it there upside down, because I took it out of the fridge because if was in the way of a
bunch of some Indonesian eggrolls I wanted to fry, but I turned that into a mess, because I forgot to take
all of those plastic wrappers off and it started to smell funny after I put them in the frying pan. I tried to get
rid of that mess by applying some sandpaper but now that pan is all scratchy all over and now she wants
me to buy a new one before the weekend. I wanted to plea culinary-incompetence, but to no avail ...
Jos ;-) -
Need to view source code for API classes
Any tips on where to find the .java files or source code for Java 2 5.0 classes?
With Java being open source, you'd think that it woud be easy to find this. But I've tried doing a few searches but te results haven't been helpful.
Cheers!Yeah I think I found it. Unfortunately there's a problem with downloading from Sun at the moment; fatal exceptions on every attempt.
Wait and try later, I guess. -
JSP codes for running a JAVA program
hello...
does anyone know the JSP codes for running a Java program from my web page?? i mean i already have my java program compiled... and i just want this java program to run in the background when I click on a button or a link...
Any idea about this?
plz advice..
aviyes... u r somewhat right... but this runs on Jakarta Tomcat...
i'm using the Apache Http Server together with the ServletExec AS which enable the Apache server to run JSP..
I've created a package where i've put my classes...
WEB-INF/classes/tbd(package name)/my classes
and i've added.. package name.. in my java program..
and then in jsp... i've written..
<%@ page import="tdb.*"%>
<jsp:useBean id="exec" class="tdb.textdb" />
<%exec.convert_data();%>
but when i run the page it says the package does not exist...
can anyone tell where to place the folder WEB-INF so that it can run fine?
thx
avi -
I Need Java code for following Algorithm
* I Need Java code for following algorithm. Kindly any one help.
1. Read the contents (ideas and its corresponding scores) from two files named as 'a' and 'b'.
2. Stored the file 'a' contents in array a[].
3. Stored the file 'b' contents in array b[].
4. compare both files like
if(a.equals(b[j])
Writing the common idea and add the score from file 'a' and 'b'.
else
write the uncommon idea and its score..
For example :
Form Agents.txt
action,65
architecture,85
eco-,15
essay,30
form,85
form,85
link,40
tangent,25
Form Agents1.txt
Black holes,69
essay,78
Herewith i have above mentioned two files named as Form Agents and Form Agents1.
Form Agents has eight fields
Form Agents1 has two fields
--> 'essay' is common in two files, so store the idea 'essay' and add the score from Form Agents score is '30' and Form Agents1 has 78 (essay 108).
Finally it stores idea in another file with uncommon fields also.
Please help us.We have tried with following code.
But we cant add the scores.
For Example:
Form Agents.txt --> has "essay,30"
Form Agents1.txt --> has "essay,78"
Result is: essay,108
Finally it stores idea in another file with uncommon fields also.
So Any one pls correct the following code.
try
DataOutputStream o1=new DataOutputStream(new
FileOutputStream("C:\\Interfaces\\interfaces\\temp\\BlackBoard\\My Design
World\\Project\\Material\\art\\System Agents\\Form Agents\\CandidateResponses\\Form
Agents.txt"));
//Reading the contents of the files
BufferedReader br= new BufferedReader(new InputStreamReader(new
FileInputStream("C:\\Interfaces\\interfaces\\temp\\BlackBoard\\My Design
World\\Project\\Material\\art\\System Agents\\Form Agents\\Ideological\\Form
Agents.txt")));
BufferedReader br1= new BufferedReader(new InputStreamReader(new
FileInputStream("C:\\Interfaces\\interfaces\\temp\\BlackBoard\\My Design
World\\Project\\Material\\art\\System Agents\\Form Agents\\Related\\Form
Agents.txt")));
while((s=br.readLine())!=null)
s1+=s+"\n";
while((s2=br1.readLine())!=null)
s3+=s2+"\n";
int numTokens = 0;
StringTokenizer st = new StringTokenizer(s1);
String[] a = new String[10000];
String[] br_n=new String[10000];
int i=0;
while (st.hasMoreTokens())
s2 = st.nextToken();
a=s2.substring(0,s2.length()-3);
s6=s2.substring(s2.length()-2);
br_n[i]=s6;
i++;
numTokens++;
int numTokens1 = 0;
StringTokenizer st1 = new StringTokenizer (s3);
String[] b = new String[10000];
String[] br1_n=new String[1000];
int j=0;
while (st1.hasMoreTokens())
s4 = st1.nextToken();
b[j]=s4.substring(0,s4.length()-3);
s7=s4.substring(s4.length()-2);
br1_n[j]=s7;
j++;
numTokens1++;
int x=0;
for(int m=0;m<a.length;m++)
for(int n=0;n<b.length;n++)
if(a[m].equalsIgnoreCase(b[n])){
int sc=Integer.parseInt(br_n[m]);
int sc1=Integer.parseInt(br1_n[n]);
int score=sc+sc1;
o.writeBytes(a[m]+","+score+"\n");
break;
else
o.writeBytes(a[m]+","+br_n[m]+"\n");
break;
}catch(Exception e){} -
I need Java code for a simple graphical hit counter for a webpage
I was wondering if anybody out there could send me some code for a simple graphical hit counter for a webpage. All the sites that I've visited are garbage and of no use to me. Please help me.
ColinNot as easy as you'd imagine with applets. You need some way to store the hits, usually through a file on the server. That's not gonna happen in a hurry for 2 reasons -
- Applets can't read/write files
- Your web server usually won't let you run programs on their machine (ie, programs that listen for socket connections from applets, then load/read/write/close a file).
In short, no, there is no simple java solution (that I know of).
Cheers,
Radish21 -
Provide the java code for the following scenario.
Hi Experts,
I have tried with all the combinations for this scenario. As per my understanding i require java code for the following scenario
so that it becomes easy........
I require a Message mapping for this Logic.
In the Source there are 4 fields and, the Target side, the fields should appear like this.
Source Structure- File
Record
|-> Header
Order_No
Date
|-> Item
Mat_No
Quantity
Target Structure-IDoc
IDoc
|-> Header
|-> Segment
Delivery_Order_No
Recv_Date
|-> Item
|-> Segment
Delivery_Order_No
Material_Num
Recv_Quantity.
The Logic is for every Order number an IDOC is generated.And if the Material num matches then the quantity should be added. and important note is that the material numbers are different for every order number. That means if a material number is 2 in the order number A. Then the material number can never be 2 in any of the order numbers.Here is the following with an example for the above scenario.
For example:-
we have
Source Structure- File
Order-no Date Mat_No Quantity
1 01/02/2011 A 10
1 01/02/2011 B 15
1 01/02/2011 A 10
2 01/02/2011 C 10
2 01/02/2011 C 10
3 01/02/2011 D 20
3 01/02/2011 D 10
3 01/02/2011 E 25
Target Structure-IDoc
Delivery_Order_No Recv_Date Material_Num Recv_Quantity
1 01/02/2011 A 20
1 01/02/2011 B 15
2 01/02/2011 C 20
3 01/02/2011 D 30
3 01/02/2011 E 25
So for this example total of 5-Idocs created. That means for this example if Order_No is 1 When the Mat_No is A the quantity gets added. For this Scenario 1 IDoc with four Fields 2 in Header(Delivery_Order_No, Recv_Date) and 2 in Item(Material_Num, Recv_Quantity) is generated by adding the quantity field in the Target Side. Similarly if Order_No is 1 when the Mat_No is B then separate IDoc is generated with four Fields 2 in Header(Delivery_Order_No, Recv_Date) and 2 in Item(Material_Num, Recv_Quantity) in the Target Side. Similarly, if Order_No is 2 when the Mat_No is C, an IDoc is generated with four Fields 2 in Header(Delivery_Order_No, Recv_Date) and 2 in Item(Material_Num, Recv_Quantity) by adding the quantity field in the Target Side. ike wise the process goes on upto 3.Kindly do the needy..
Kindly provide the java code.
Thanq very much in advance..what i have understood from ur example is that u want to generate an idoc for unique combination of Order-no and Mat_No
if yes then chk the below mapping..
change the context of Order_No, Date, Mat_No and Quantity to Record (right click-> context)
1)
Order-no
----------------------concat[;]---sort----splitbyvalue(valuechanged)-----collapse context---IDoc
Mat_No
2)
Order-no
--------concat[;]---sort----splitbyvalue(value changed)---collapse context---UDF1--splitbyvalue(each value)--Delivery_Order_No
Mat_No
3)
Order-no
-----------concat[;]---sortbykey----------------------- \
Mat_No / \
Date--------------- / \
----------------------------------------------------------FormatByExample-----collapsecontext---splitbyvalue(each value)----Recv_Date
Order-no /
-----------concat[;]---sort----splitbyvalue(value changed)
Mat_No
4)
Order-no
--------concat[;]---sort----splitbyvalue(value changed)---collapse context-UDF2--splitbyvalue(each value)--Material_Num
Mat_No
5)
Order-no
-----------concat[;]---sortbykey
Mat_No /
Quantity --------------- /
----------------------------------------------------------FormatByExample-----SUM(under statistic)----Recv_Quantity
Order-no
-----------concat[;]---sort----splitbyvalue(value changed)
Mat_No
UDF1:
String [] temp= a.split(";");
return temp[0];
UDF2:
String [] temp= a.split(";");
return temp[1];
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