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    <p>If I understand you correctly you want to close the application even if the user did not click on the close button. You will need to register WindowEvents maybe with addWindowListener() or enableEvents() whichever suits your needs better.</p> <p>You can then invoke the event with a call to processWindowEvent(). Here is a sample code that will create a JFrame, wait 5 seconds and close the JFrame without user interaction.</p> <pre><code>import javax.swing.*; import java.awt.*; import java.awt.event.*; public class ClosingFrame extends JFrame implements WindowListener{ public ClosingFrame(){ super("A Frame"); setSize(400, 400); //in case the user closes the window setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true); //enables Window Events on this Component this.addWindowListener(this); //start a timer Thread t = new Timer(); t.start(); } public void windowOpened(WindowEvent e){} public void windowClosing(WindowEvent e){} //the event that we are interested in public void windowClosed(WindowEvent e){ System.exit(0); } public void windowIconified(WindowEvent e){} public void windowDeiconified(WindowEvent e){} public void windowActivated(WindowEvent e){} public void windowDeactivated(WindowEvent e){} //a simple timer class Timer extends Thread{ int time = 10; public void run(){ while(time-- &gt; 0){ System.out.println("Still Waiting:" + time); try{ sleep(500); }catch(InterruptedException e){} } System.out.println("About to close"); //close the frame ClosingFrame.this.processWindowEvent( new WindowEvent( ClosingFrame.this, WindowEvent.WINDOW_CLOSED)); } } //instantiate the Frame public static void main(String args[]){ new ClosingFrame(); } } </code></pre> <p>As you can see, the processWindowEvent() method causes the WindowClosed event to be fired where you have an oportunity to do some clean up code if you require before closing the application.</p>
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    1. COwindowClosed should call dispose() not System.exit(0).
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      1. USJames Schek
 

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