Re: start a new JFrame from an existing one, and when old JFrame closes new one does not

From:
"jakester" <vangjake@googlemail.com>
Newsgroups:
comp.lang.java.programmer
Date:
2 Apr 2007 16:13:46 -0700
Message-ID:
<1175555626.628280.122780@e65g2000hsc.googlegroups.com>
If I comment out the code
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); then I get the
intended behaviour. The problem is now the java thread does not
terminate.

I looked at the JavaDocs for the options on setDefaultCloseOperation
and it turns out JFrame.DISPOSE_ON_CLOSE would probably help me out.
So I uncommented the line above and did
this.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE); and everything
works!

Thank you both.

On Apr 2, 6:50 pm, Knute Johnson <nos...@rabbitbrush.frazmtn.com>
wrote:

jakester wrote:

I have the need to create a new JFrame from an existing one. The code
below show how I am accomplishing this task. However, when the
original JFrame closes, all JFrames created from the original JFrame
closes. Could someone please help me how to create a new JFrame so
that it runs outside the thread of the original? Thanks.

public class MyGuiForm extends JFrame implements ActionListener {

private JButton _btnNew;

public MyGuiForm() {
_btnNew = new JButton("New");
_btnNew.addActionListener(this);

this.getContentPane().setLayout(new BorderLayout());
this.getContentPane().add(_btnNew);

this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.pack();
this.show();
}

public void actionPerformed(ActionEvent ae) {
Object source = ae.getSource();
if(null == source) return;

if(_btnNew == source) {
new MyGuiForm();
}
}

/**
* @param args
*/
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
JFrame.setDefaultLookAndFeelDecorated(true);
new MyGuiForm();
}
});
}
}


Your code is very difficult to read without any indentation.

You tell your program to exit when this frame is closed with this line:

 > this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

Take that line out and it won't do that any more. Also you don't need
all of the 'this.' in front of methods that are part of 'this'.

--

Knute Johnson
email s/nospam/knute/

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