Multiple thread « Thread « Java Swing Q&A





1. Are there any frameworks for handling database requests in swing applications?    stackoverflow.com

I believe any programmer who has been dealing with database requests in a gui application has run into some or all of the following problems:

  • Your GUI freezes because you call database layer ...

2. Multi-threading and Java Swing Problem    stackoverflow.com

Hi I have a GUI application that is working fine. I created a socket server. When I create a new object of the Server class in program the GUI ...

3. Swing Thread Callbacks    stackoverflow.com

Any suggestions on how I can cleanup the following code pattern that repeats multiple times in my app.

new Thread(new Runnable() {
  public void run() {
    // Do ...

4. When i execute get LDAPConnection through Swing it hangs    stackoverflow.com

When I run following code through Main method, it works fine but when i try to execute it on click of swing button, it hangs. Please help

import java.util.Hashtable;

import javax.naming.AuthenticationException;
import javax.naming.Context;
import javax.naming.NamingException;
import javax.naming.directory.DirContext;
import ...

5. What happens when Swing's threading policy is violated?    stackoverflow.com

In the past few years I've mostly done UI development in Eclipse, which is very conservative in terms of thread access: any attempt to change a property on a UI widget ...

6. Using extended Swing component, threading doubt    stackoverflow.com

I have built my own component extending JPanel. I've added a few methods like calculateWhatever()... Should I call those methods with invokeLater() as well? Substance L&F is not complaining about it but ...

7. What is the correct way of manipulating Swing components at program startup?    stackoverflow.com

I'm creating an application in Swing using NetBeans. I would like to be able to manipulate some components during its startup (just once), after the window's made visible, for example update ...

8. With Swing & Java, what is done by the "Swing-Shell" thread    stackoverflow.com

with threads & swing, the event queue (event dispatch thread) is broadly presented & discussed. However, when examining the thread states with a Swing application, there's also a thread named Swing-Shell. With ...

9. Java Swing long Thread execution    stackoverflow.com

I have written a framework that does calculations that take a long time to execute (about 15 minutes). I now want to write an interface in Swing which will gather the ...





10. Swing, Passive View and Long running tasks    stackoverflow.com

I'm trying to implement a Passive View based gui system in swing. Basically i want to keep my view implementation (the part that actually contains swing code) ...

11. Who interrupts my thread?    stackoverflow.com

I understand what an InterruptedException does and why it is thrown. However in my application I get it when waiting for SwingUtilities.invokeAndWait() on a thread that is only known by my ...

12. Java Swing application won't quit after recieving TERM signal    stackoverflow.com

I have a Java Swing application that is being used as a cluster application. The problem is that every time the cluster tries to terminate the Java application, it just hangs ...

13. Java's Swing Threading    stackoverflow.com

My understanding is that if I start up another thread to perform some actions, I would need to SwingUtilities.invokeAndWait or SwingUtilities.invokeLater to update the GUI while I'm in said thread. Please ...

14. Swing and handling threads    stackoverflow.com

There's a couple questions here on StackOverflow on the subject of threading with the Swing api but things still aren't clear. What is the issue with the EDT, what is the ...

15. Java Swing + Threads    stackoverflow.com

This code draws two lines but waits a second.. I am looking how to do that in a seperate thread so it wont freeze the application.. To draw one line and display it ...

16. How to detect Swing thread policy violations    stackoverflow.com

I am looking for an automatic way to detect violations of the Swing's single threaded policy in my code. I'm looking for something along the lines of some AOP code ...





17. How to avoid HeadlessException in thread?    stackoverflow.com

I have tried to open a dialog box in Servlet & it opens fine. But then I tried to achieve same thing in my thread's run method. It gaved me following error:

java.awt.HeadlessException
at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)
at ...

18. What's the omission/error out here?    stackoverflow.com

There should be an error/omission in the next code but I can't see where mostly because I've never used threads. Can someone please find what I'm missing?

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import ...

19. Swing and inheritance    stackoverflow.com

I have two classes one extending another. In both of them i have fields representing swing components. The problem is that something is wrong when i try to use components from ...

20. Refactoring—good practise in Sockets—simple server-client Swing appl    stackoverflow.com

I have written a simple server - client program with Swing interface using singleton and observer pattern. Each client connects to the server and can send messages. The server forwards the ...

21. Java Wait for thread to finish    stackoverflow.com

I have a thread downloading data and I want to wait until the download is finished before I load the data. Is there a standard way of doing this? More Info: I ...

22. Java Thread Management and Application Flow    stackoverflow.com

I have a Java application that downloads information (Entities) from our server. I use a Download thread to download the data. The flow of the download process is as follows:

  1. Log in ...

23. Unexplained Java shenanigans - possibly to do with threading?    stackoverflow.com

The Problem

I am currently halfway through building a Game of Life simulator in Java (in Eclipse), using the Swing GUI, as part of a project for college. This is going along ...

24. java thread problem    stackoverflow.com

I wrote a simple program with java swing which suppose to start another thread and in that thread a JForm will show up when I click a button. But JForm is ...

25. Swing Toolkit and multithreading    stackoverflow.com

It is said that "Swing toolkit is not multithread-Safe? What is meant by this statement?

26. Identifying Swing Threads for displaying frequent data input in Java    stackoverflow.com

For my current application, I am struggling with identifying the Swing threads in my application. With Swing threads I mean:

  • Initial threads
  • The event dispatch thread
  • Worker threads
My application:
  • simple user interface which is supposed ...

27. Java Threads with Swing UI    stackoverflow.com

After having some trouble with setting up a thread to start my MIDI sequencer I decided to simply remove it, although it would slow my UI down I would be able ...

28. What code should I surround with run(){}?    stackoverflow.com

I finished a 2000-line Swing + SQL program and I'd like to add to it a login window before everything is initialized. The login window is a JFrame class, instanced from ...

29. Threads in Java Swing, overview of three approaches in an application    stackoverflow.com

I'm using the code bellow in a desktop swing application, and I don't have much expertise with threads, because I'm a casual web programmer and deal with swing isn't my candy... I ...

30. Making Swing components synchronized    stackoverflow.com

I'm reading Java Threads 3rd Ed. by Oaks and Wong (O'Reilly 2004). They carry an example of a Swing typing game throughout the book. The classes they define are mostly custom subclasses of ...

31. "Build Automatically" function with SWING    stackoverflow.com

How should I implement a function like that on my SWING editor? I was thinking of a thread started on a releaseKey event. This thread should have a timer of a second. ...

32. Java threads organization guidance    stackoverflow.com

I have created an application which queries a MySQL database for a list of items. The resulting data set is parsed into individual Objects and they are passed throughout the program ...

33. a key listener that listen only special keys?    stackoverflow.com

my big problem is that i am codding a game.i have 2 player in a jframe that they can play cuncurrent. first player play with arrow keys and second with w/a/s/d ...

34. Java multiple threads accessing one String    stackoverflow.com

I have a one String which will be access by four different threads in unpredicatable order.

String s = "When value is";
Now above string s will be updated by four different threads ...

35. My overriden paint method is not getting called    stackoverflow.com

I have a JPanel that is meant to act as a HUD for my game, naturally, I have overridden the paint method to do my own custom display, this does get ...

36. Check availability of Internet Connection + Communicate between 2 threads    stackoverflow.com

I have 2 questions:

  1. How can I check if Internet connection is whether turned on or turned off? I'm using Html Unit and I'm working on Windows.
  2. I want to make a JLabel ...

37. Strange situation with java.net.SocketTimeoutException: Connect timed out    stackoverflow.com

Hello I can not understand a single moment. The following code in a simple application is fulfilled perfectly:

package javaapplication12;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.util.Date;

/**
 *
 * ...

38. Multi Thread Communication (java)    stackoverflow.com

I'm writing an analysis of standard Maze Solving Algorithms and neural network based Maze Solving algorithms. I have created 7 classes (for now), one for each maze solving algorithm. In my ...

39. Batch-updating JComponents. Need suggestions for a better (threaded) design    stackoverflow.com

I have a GUI in which some groups of JComponents get "batch-updated", i.e., I have a loop and for almost every iteration of the loop, I need to update these JComponents. ...

40. How to - Java Thread Accessing Other Thread (SWING)    stackoverflow.com

Regarding the problem, when i start a thread from the main application, lets say process A runs in background and updates a text box outside of the thread saying it's running ...

41. How to synchronously repaint custom console using threads?    stackoverflow.com

I have a JScrollPane(packed with text area) that acts as a custom console for my swing application. Here is the code for my console

    class InternalConsoleFrame{
   ...

42. Java trouble with threads    stackoverflow.com

I am trying to create a slot machine in java. In this slot machine I have completed the basic beginning of the project. I have the animators that lands on a ...

43. How to keep one thread to call multiple JForms?    stackoverflow.com

Let's say I have one thread running (I'm creating many instances of this thread), and inside that I instantiate a JForm. While being inside that JForm, I call another JForm. Think ...

44. multithreading for java graphics    stackoverflow.com

I have a java application that streams raw data and draws real time plots accordingly. this is handled by calling methods from a class i wrote that uses the ...

45. Threading with Swing    stackoverflow.com

basically, I have a program that has a class to create a basic GUI, and another class that extends Canvas. This Canvas class is added to a JPanel in the usual ...

46. java swing paint with multithreads    stackoverflow.com

I have been trying to make a maze which two rectangles will move over depending on some rules.The problem is I have to use multithread and a thread pool.I never ...

47. multi-threaded Swing    coderanch.com

I'm not usre if this question belongs here or under the Swing forum, it covers both. I'm getting the following exception, multiple times, but not every time the line is encountered: Exception occurred during event dispatching: java.lang.NullPointerException at devices.ForeRunner201XMLLoader$1.run(ForeRunner201XMLLoader.java:136) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178) at java.awt.EventQueue.dispatchEvent(EventQueue.java:454) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:141) at java.awt.Dialog$1.run(Dialog.java:540) at java.awt.Dialog.show(Dialog.java:561) at java.awt.Component.show(Component.java:1133) at java.awt.Component.setVisible(Component.java:1088) at root.Rl$2.actionPerformed(Rl.java:192) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1786) ...

48. Exiting a multi-threaded Swing application without System.exit    coderanch.com

Providing you're using a reasonably recent Java (1.4 on, I think), you can exit a Swing application without doing System.exit(). You need to ensure that your JFrames etc. all have a parent that is under your control, and never the hidden parent that Swing instantiates when no parent is specified. You can create a dummy parent, which you never show on-screen, ...

49. swing and multithreading    coderanch.com

50. Multithreading issaues wit swings    java-forums.org

Hi I'm doing an NMS project ,I want to collect data from all the switches and routers then display status of each ports of network devices.Now I'm ok with threads .How should i write code using NETBEANS to continuously poll data from network devices .For polling each device i would use one thread which continuously polls the device , gets the ...

51. Multi-Threading in Swing Applications    forums.oracle.com

Please learn forum etiquette if you want to have a better chance of having your questions answered. You've resurrected a zombie thread, an old thread. Don't do this. Better to start your own thread, give it a relevant title and try to put a little more thought into your question. What exactly do you need to do? Have you done a ...