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

"jakester" <>
2 Apr 2007 16:13:46 -0700
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

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

Thank you both.

On Apr 2, 6:50 pm, Knute Johnson <>

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");

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


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() {
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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