Every thing is done twice

my guess would be that you did something like this:

public class MyClass extends JPanel implements ActionListener() {

private JButton button;

public void actionPerformed( ActionEvent e ) {

System.out.println( "# 1" );

}

public static void main( String args[] ) {

button = new JButton( "Ok" );

button.addActionListener( this );

// ... lots of code here

button.addActionListener( new ActionListener() {

public void actionPerformed( ActionEvent e ) { System.out.println( "# 2" );

}

});

getContentPane().add( button );

}

}

Hmm.. but I think even that would just add the nested action listener.

Technique at 2007-7-5 22:35:04 >

Normally this means that you have added an actionlistener twice or added an actionListener in another listener.

1. Adding an actionListener twice.myTextField.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent ae) {

doStuff();

}

});

//... buncha other code ...

myTextField.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent ae) {

doStuff();

}

});

In this case doStuff() will be called twice for each event.

2. Adding an ActionListener in another listener.myTextField.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent ae) {

otherTextField.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent ae) {

System.out.println("Hello");

}

}

}

}

In this case, each time the event fires on myTextField, another actionListener is added to otherTextField. So, the first time 'Hello' will print once, the next time twice, 3 times,...

bbritta at 2007-7-5 22:35:04 >