Launching JFrame from a button

Question

I've got the following button...

    public void actionPerformed(ActionEvent arg0) {
    Contacts contact = new Contacts();
    contact.setVisible(true);
    }

Contacts is just a simple JApplet...

 public class Contacts extends JApplet {

private JPanel jContentPane = null;

public Contacts() {
    super();
}

public void init() {
    this.setSize(500, 260);
    this.setContentPane(getJContentPane());
}

private JPanel getJContentPane() {
    if (jContentPane == null) {
        jContentPane = new JPanel();
        jContentPane.setLayout(null);
        jContentPane.add(getJList(), null);
        jContentPane.add(getJButton(), null);
        jContentPane.add(getJButton1(), null);
    }
    return jContentPane;
}
  }

Why is what I'm doing not working? How would I launch this JFrame?

All your code is in init() that you do not call – Romain Hippeau Nov 23 '10 at 22:49 — Romain Hippeau, Nov 23 '10 at 22:49
Tried this. Calling `init()` doesn't do anything. – Skizit Nov 23 '10 at 22:53 — Skizit, Nov 23 '10 at 22:53

trashgod · Accepted Answer · 2018-03-22T13:23:26.357

3

Like JFrame and JDialog, JApplet is a top-level container. You can't put one inside the other. Instead, do something like this:

class Contacts extends JFrame { ... }
...
Contacts contact = new Contacts();
contact.setVisible(true);

If you have an existing JApplet that you want to display in a JFrame, you can create a hybrid, as shown in the examples examined here.

edited Mar 22 '18 at 13:23

answered Nov 23 '10 at 23:15

trashgod

203,806
29
246
1,045

Launching JFrame from a button

1 Answers1