Doubt in creatin swing GUI

First I created a JInterFrame as a Parent Component. From that i created an instance for JOptionPane .then i create a JInternalFrame by using JOptionPane's instance.
Ex:
JOptionPane optionPane = new JOptionPane(-,-,-,-,-) ;
JInternalFrame internalFrame = optionPane.createInternalFrame(parentComponent, resources.getString("RecordingTitle"));
here it.'s throwing error.RuntimeError
I think it is getting error on casting of first argument - parentComponent
without using null as a first argument what can i do ?
pls explain with any example

I just looked into the API...
First of all, you should call a JOptionPane in a static way.
Second, you have to define a parent frame/panel/whatever, where the OptionPane should appear.
For example:
int decision = JOptionPane.showInternalConfirmDialog(parent, "Do you agree?");
if(decision == 0){ // ... }

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Measuring Swing GUI memory consumption

Hi community,
First , I beg you for excuse for posting this here and not in the Swing forum. I think the question is not clear GUI question, but a more generic one.
I have a GUI that seems to consume a lot of memory(i.e. opening several screens causes OutOfMemoryError and data received on network measures to a very small amount (<5%) compared to the total memory shown by Task Manager).
I would like to take these screens apart to discover which of their parts are heavy so that I can concentrate my efforts on optimizing them. I cannot use ObjectOutputStream serialization since it seems there are lots of classes that do not implement Serializable, so I need some other way of determining component memory sizes. I believe that XMLEncoder serialzation will leed to nowhere because it contains a lot of text describibg properties that cannot be accurately measured.
What can I use to measure the memory consumption for a given component tree?
Thank you for your time
Mike

Swing related questions should be...
Umm have you considered the use of a Profiler? I kind of doubt it is the GUI per se but a model or something that is leaking memory. I mean there are lot's of fairly complex GUI's out there that don't have these issues so I suspect there is a very deep or complex structure somewhere that is eating all of the memory.
But in short I think running in some sort of profiler would be good becuase I also suspect that this may be one of this issues where looking at each component may not help because it's as the whole thing is used at runtime where some complexity comes into play and it dies.
Try http://www.manageability.org/blog/stuff/open-source-profilers-for-java for a start.

Swing gui code generator

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kevin

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Loading large files in Java Swing GUI

Hello Everyone!
I am trying to load large files(more then 70 MB of xml text) in a Java Swing GUI. I tried several approaches,
1)Byte based loading whith a loop similar to
pane.setText("");
             InputStream file_reader = new BufferedInputStream(new FileInputStream
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             int BUFFER_SIZE = 4096;
             byte[] buffer = new byte[BUFFER_SIZE];
             int bytesRead;
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2) I read in several places that I could load only small chunks of the file at a time and when the user scrolls upwards or downwards the next/previous chunk is loaded , to achieve this I am guessing extensive manipulation for the ScrollBar in the JScrollPane will be needed or adding an external JScrollBar perhaps? Can anyone provide sample code for that approach? (Putting in mind that I am writting code for an editor so I will be needing to interact via clicks and mouse wheel roatation and keyboard buttons and so on...)
If anyone can help me, post sample code or point me to useful links that deal with this issue or with writting code for editors in general I would be very grateful.
Thank you in advance.

Hi,
I'm replying to your question from another thread.
To handle large files I used the new IO libary. I'm trying to remember off the top of my head but the classes involved were the RandomAccessFile, FileChannel and MappedByteBuffer. The MappedByteBuffer was the best way for me to read and write to the file.
When opening the file I had to scan through the contents of the file using a swing worker thread and progress monitor. Whilst doing this I indexed the file into managable chunks. I also created a cache to further optimise file access.
In all it worked really well and I was suprised by the performance of the new IO libraries. I remember loading 1GB files and whilst having to wait a few seconds to perform the indexing you wouldn't know that the data for the JList was being retrieved from a file whilst the application was running.
Good Luck,
Martin.

Running a Java application from a Swing GUI

Hi,
I was wondering if there is a simple way to run a Java application from a GUI built with Swing. I would presume there would be, because the Swing GUI is a Java application itself, technically.
So, I want a user to click a button on my GUI, and then have another Java application, which is in the same package with the same classpaths and stuff, run.
Is there a simple way to do this? Do any tutorials exist on this? If someone could give me any advice, or even a simple "yes this is possible, and it is simple" or "this is possible, but difficult" or "no this is not possible" answer, I would appreciate it. If anyone needs more information, I'll be happy to provide it.
Thanks,
Dan

I don't know if it is possible to run the main method from another Java app by simply calling it...
But you could just copy and paste the stuff from your main method into a new static method called something like runDBQuery and have all the execution run from there.
How does that sound? Is it possible?
What I'm suggeting is:
Original
public class DBQuery{
public static void methodA(){
public static void doQuery(){
methodA();
public static void main(String[] args){
// Your method calls
//Your initializing
doQuery();
}Revised:
public class DBQuery{
public static void methodA(){
public static void doQuery(){
methodA();
public static void doMyQuery(){
// Your method calls
//Your initializing
doQuery();
// No main needed!!
//public static void main(String[] args){
// Your method calls
//doQuery();
//}

(Youtube-) Video in a Swing GUI

Hey everyone,
I'm currently trying to play a video in my Swing GUI with JMF but I really can't get it to work.
With the help of google I got this far:
import java.awt.BorderLayout;
import java.awt.Component;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import javax.media.CannotRealizeException;
import javax.media.Manager;
import javax.media.NoPlayerException;
import javax.media.Player;
import javax.swing.JFrame;
public class MediaPanel extends JFrame {
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            mediaURL = new URL("http://www.youtube.com/watch?v=Q7_Z_mQUBa8");
        } catch (MalformedURLException ex) {
            System.err.println(ex);
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            Player mediaPlayer = Manager.createRealizedPlayer(mediaURL);
            // get the components for the video and the playback controls
            Component video = mediaPlayer.getVisualComponent();
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                add(video, BorderLayout.CENTER); // add video component
            if (controls != null) {
                add(controls, BorderLayout.SOUTH); // add controls
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}But all I get is errors:
Warning: The URL may not exist. Please check URL
No media player found
Can you please please help me get this working? I would really appreciate a little walkthrough
Best regards,
Patrick
Edited by: 954807 on Aug 24, 2012 6:52 AM

Just use \ tags. People don't like to go to external sites.
I really advise you to consider using JavaFX 2 here. Swing is old and not really supported anymore, JMF is also old and absolutely not supported anymore.

Help on right mouse click in swing GUI.

I am working on a swing GUI interface which has Panels. One Panel contains two sub panels. I want to add the Right Mouse click feature to the panels. How should i go about achieving this? Please provide sample example if any.
Thanks in advance.

anyPanel.addMouseListener(new MouseAdapter(){
   public void mouseReleased(MouseEvent e){
      if(e.isPopupTrigger()){
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});

In this case, can I modify swing GUI out of swing thread?

I know the Swing single thread rule and design (Swing is not thread safe).
For time-consuming task, we are using other thread to do the task and
we use SwingUtilities.invokeAndWait() or SwingUtilities.invokeLater (or SwingWorker) to update Swing GUI.
My problem is, my time-consuming task is related to Swing GUI stuff
(like set expanded state of a huge tree, walk through entire tree... etc), not the classic DB task.
So my time-consuming Swing task must executed on Swing thread, but it will block the GUI responsivity.
I solve this problem by show up a modal waiting dialog to ask user to wait and
also allow user to cancel the task.
Then I create an other thread (no event-dispatch thread) to do my Swing time-consuming tasks.
Since the modal dialog (do nothing just allow user to cancel) is a thread spawn by
Swing event-dispatch thread and block the Swing dispatch-thread until dialog close.
So my thread can modify Swing GUI stuff safely since there are no any concurrent access problem.
In this case, I broke the Swing's suggestion, modify Swing stuff out of Swing event-dispatch thread.
But as I said, there are no concurrent access, so I am safe.
Am I right? Are you agree? Do you have other better idea?
Thanks for your help.

If you drag your modal dialog around in front of the background UI, then there is concurrent access: paint requests in your main window as the foreground window moves around.

How to display multiple tables from database using netbeans swing gui

plz reply asap on how to display multiple tables from database using netbeans swing gui into the same project

Layered Pane with JTables or you can easily to it with a little scripting and HTML.
plzzzzzzzzzzzzzzzzz, do not use SMS speak when posting.

Spreadsheets and SWING GUI's

I have to embed a spreadsheet facility in a SWING GUI, what is the best and easiest way to do this ??

I am not quite sure what your problem is.
The way I see it, your question is one of the following:
1. How do I (generally) make a user interface on top of my dos-based program?
2. How do I make user interfaces in swing?
If your question is the first, I'm afraid I can't tell you either. Would seem pretty obvious to me, make a simple dialog based app, using menu's or actions to trigger tha actions that were formerly triggered by numbers, etc...
In the other case, I recommend the java swing tutorial at http://java.sun.com/docs/books/tutorial/uiswing/
Greetings,
Gert

Creating Undo Menu on Swing GUI

Undo Menu is to be Created on Swing GUI on the Graphics. In the Tutorial, Undo with Text is given. But on implementing the logic of Undo with Text , some Errors come.

You can use javax.swing.undo.* stuff only with classes implementing
javax.swing.text.Document interface.
To add undo/redo functionality for some Graphic components you should program this mechanism by yourself.
So create your own object model, track all changes and implement/add appropriate listeners.

Need help with threading in Swing GUI !!!

I've written an app that parses and writes
files. I'm using a Swing GUI. The app
could potenially be used to parse hundreds or even
thousands of files. I've included a JProgressBar
to monitor progress. The problem is when I parse
a large number of files the GUI freezes and only
updates the values of the progress bar when the
parsing and writing process is finished.
I assume I need to start the process in a seperate thread. But, I'm new to threads and I'm not sure
whether to start the Progressbar code in a seperate
thread or the parsing code. As a matter of fact I really
don't have any idea how to go about this.
I read that Swing requires repaints be done in the
event dispatch thread. If I start the parsing in a seperate
thread how do I update the progressbar from the other
thread? I'm a thread neophyte.
I need a cigarette.

In other words do this:
Inside event Thread:
handle button action
start thread
return from action listener
Inside worker Thread:
lock interface
loop
perform action
update progress bar
unlock interface
return from worker ThreadDoesn't updating the progress bar (and locking/unlocking the interface components) from within the worker thread violate the rule that you shouldn't mess with Swing components outside the event thread? (Do I have that rule right?)
In any case, is there any way to just post some kind of event to the progress bar to update it from within the worker thread, thereby insuring that the GUI progress bar update is being invoked from the event thread? This would also obviate the need to use a timer to poll for an update, which I think is a waste especially when the monitored progress is at a variable rate, (or for number crunching, is executing on different speed machines).
Also, doesn't using invokeLater() or invokeAndWait() still block the event dispatching thread? I don't understand how having a chunk of code started in the event thread doesn't block the event thread unless the code's executed in a "sub-thread", which would then make it not in the event thread.
I'm also looking to have a progress bar updated to monitor a worker thread, but also want to include a "Stop" button, etc. and need the event queue not to be blocked.
The last thing I can think of is to implement some kind of original event-listener class that listens to events that I define, then register it with the system event queue somehow, then have the worker thread post events to this listener which then calls setValue() in the progress bar to insure that the bar is updated from the event queue and when I want it to be updated. I don't know yet if it's possible to create and register these kinds of classes (I'm guessing it is).
Thanks,
Derek

Need to run swing GUIs under different JRE versions

I need to run swing GUIs under different JRE versions. Where can I find information about how to use only classes which exist from version 1.1.7 and above?

Under 1.1.7, Swing (then version 1.0) was under com.sun.java.swing. The package name changed in Swing 1.1 b3/JDK 1.2 to javax.swing. You can see what classes were available under Swing 1.0 at http://java.sun.com/products/jfc/swingdoc-api-1.0.3/frame.html

Learning swing gui by hand or gui builder?

Hello,
Which is a better way of start learning writing swing gui based apps? by hand or using gui builder?
Do you know any useful web links? or do you consider buying books?
Thanks.

>>
Hmm, the differences:
1) The GUI builder app resizes correctly.-->>falseJust stating it is false doesn't make it so. I never have any issues with my GUI builder apps resizing correctly. I do have issues making my coded by hand apps resize correctly. Ignorance on my part? Possibly
I used to use a GUI builder just for complicated layouts and use GridBagLayout for simple dialogs inside an app, but I find myself just using a GUI builder now. Just much quicker and much less hassle.
As far as maintaining the code if you use the GUI builder for maintanence where is the issue?
i have never seen a GUI builer that uses
layoutmangers please point me to the one that you are
using i would love to take a look
secondly have you seen tried the little exersise you
will be suprised at how complex the code is compared
to the one done by hand!!!!IntelliJ's GUI builder appears to use a custom GridLayout manager, the code it generates appears pretty straightforward to me, doesn't seem overly complicated:
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Swing GUI for Javadoc

Hi everyone,
I'm trying to learn some basic IO and Swing. My project is to make a Swing GUI for javadoc. It's supposed to run at least under W2K and XP.
The Swing part is going fine, but I can't seem to get IO-part working.
I tried working with the Runtime- and the Process-class, but I don't can't seem to execute javadoc or read any command-line output. Here's a sample of code that compiles ok, but doesn't do anything.
try {
Process p = Runtime.getRuntime().exec("javadoc");
InputStream in = p.getInputStream();
String s = in.toString();
System.out.println(s);
System.out.println();
System.out.println(process.waitFor());
System.out.println();
System.out.println(process.exitValue());
System.out.println();
System.out.println(""+process);
} catch (Exception e) {
System.out.println("error");
if anyone has any tips, suggestions or simple code samples, I would be very happy to hear from you.

Alright, I figured out how to read the inputstream, but
I still get an error:
Windows 2000
start
<ERROR>
javadoc: No packages or classes specified.
and the program doesn't terminate for some reason.
here's the new sourcecode:
import java.io.*;
public class JavaDocCommander {
     public static void main(String[] args) {
          System.out.println(System.getProperty("os.name"));
          System.out.println("start");
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class Test{
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          try {
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec("javadoc");
InputStream stderr = proc.getErrorStream();
InputStreamReader isr = new InputStreamReader(stderr);
BufferedReader br = new BufferedReader(isr);
String line = null;
System.out.println("<ERROR>");
while ( (line = br.readLine()) != null)
System.out.println(line);
System.out.println("</ERROR>");
int exitVal = proc.waitFor();
System.out.println("Process exitValue: " + exitVal);
} catch (Throwable t)
t.printStackTrace();

Doubt in creatin swing GUI

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