problems with repainting the screen

[Mike Phillip]

Hi, I'm with troubles in this applet, I created a button that when clicked creates another.

But the screen doesn't show the new button unless I resize the screen with the mouse.

here's a code example of what I'm doing:

 import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
 
import javax.swing.JApplet;
import javax.swing.JButton;
 

public class TestePan extends JApplet implements ActionListener{
 

Container c;

public void init() {

c = getContentPane(); 
c.setLayout(new FlowLayout());
JButton b1 = new JButton("b1");
b1.addActionListener(this);
c.add(b1);
c.setSize(300, 300);

}

public void paint(Graphics g) {
c.paint(g);
System.out.println("paint");
}

public void actionPerformed(ActionEvent e) {
c.add(new JButton("b2"));

repaint();


}


}   
 

how can it repaint without resizing?

thanks

[Ulf Dittmer]

When adding or removing components the layout needs to be redone. The easiest way to do that is to call "invalidate()" before "repaint()".

[Mike Phillip]

thanks, before you reply I tested the validate(), works.

thanks