ThreadBasedCatcher - Demonstrate catching uncaught exceptions : Exceptions « Language Basics « Java






ThreadBasedCatcher - Demonstrate catching uncaught exceptions

          
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;

/**
 * ThreadBasedCatcher - Demonstrate catching uncaught exceptions 
 * thrown in an unrelated Thread.
 * @author ian
 * @verion $Id: ThreadBasedCatcher.java,v 1.2 2004/03/20 20:43:27 ian Exp $
 */
public class ThreadBasedCatcher extends JFrame{

  public static void main(String[] args) {
    new ThreadBasedCatcher().setVisible(true);
  }
  public ThreadBasedCatcher(){
    Container cp = getContentPane();
    JButton crasher = new JButton("Crash");
    cp.add(crasher);
    crasher.addActionListener(new ActionListener(){
      public void actionPerformed(ActionEvent e){
        throw new RuntimeException("You asked for it");
      }
    });
    Thread.setDefaultUncaughtExceptionHandler(
        new Thread.UncaughtExceptionHandler(){
          public void uncaughtException(Thread t, Throwable ex){
            System.out.println(
              "You crashed thread " + t.getName());
            System.out.println(
              "Exception was: " + ex.toString());
          }
        });
    pack();
  }
}



           
         
    
    
    
    
    
    
    
    
    
  








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