Hi,

my GUI freezes if I try to replace a contentPane of a JFrame from the
actionListener of one of the components in the current contentPane.
I'd like to change the contentPane after a button as been clicked, but the
button remain pressed and the gui freezes.

class Interface() implements Runnable {
 JFrame frame;

 Interface() {
   frame = new JFrame("Hello");
 }

 void run() {  // the method called from SwingUtilities.invokeLater()
   frame.setContentPane(new MyPanel1(this));
   frame.setVisible(true);
 }

 void doSomeWork() {
   /* callback function: change panel */
   frame.setContentPane(new MyPanel2(this));
 }
}

class MyPanel extends JPanel {

 Interface iface;  // hook for the interface

 MyPanel(Iterface iface) {
   this.iface = iface;

   JButton b = new JButton("Hi");
   b.addActionListener(new ActionListener() {
     void actionPerformed(ActionEvent e) {
       iface.doSomeWork();  // callback to the interface
     }
   });

   this.add(b);
 }
}