Re: BoxLayout annoyance
Kenneth P. Turvey wrote:
Why would this line give me an error about sharing the box layout. I
can't possibly be saving it. I don't even have a reference to it.
frame.setLayout(new BoxLayout(frame, BoxLayout.PAGE_AXIS));
I've run into this before and I can't seem to remember what the solution
was.
Thanks.
Ken:
Apparently you have to pass the content pane as the argument to the
BoxLayout constructor. Passing a JFrame doesn't work. The change to
allow adding components to a JFrame directly, while very handy, has a
few gotchas. There was another one of these the other day that drove me
nuts for a while.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class test extends JFrame {
public static void createGUI() {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container c = f.getContentPane();
f.setLayout(new BoxLayout(c,BoxLayout.Y_AXIS));
JButton b = new JButton("One");
f.add(b);
b = new JButton("Two");
f.add(b);
f.pack();
f.setVisible(true);
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
createGUI();
}
});
}
}
--
Knute Johnson
email s/nospam/knute2008/
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