JPanel problem

Hi,

I have 3 JPanel and I want to add Jbuttons to all 3. I have an array of buttons. To the first JPanel I add all the buttons to the second i add the third button from the array and to the last one i want to add all the buttons. I don't understand why the first 2 panels do not appear, and only the last one does.

Pls help

thanks

here is the code :

publicclass TestJpanel{

publicstaticvoid main(String[] args){

JPanel panel =new JPanel();

JPanel panel2 =new JPanel();

JPanel panel3 =new JPanel();

JFrame frame =new JFrame();

frame.getContentPane().setLayout(new GridLayout(3,1));

JButton[] buttons =new JButton[5];

for(int i = 0; i < buttons.length; i++){

buttons[i] =new JButton("Button" + i);

}

for(int i = 0; i < buttons.length ; i++){

panel.add(buttons[i]);

}

frame.getContentPane().add(panel);

panel2.add(buttons[2]);

frame.getContentPane().add(panel2);

for(int i = 0; i < buttons.length ; i++){

panel3.add(buttons[i]);

}

frame.getContentPane().add(panel3);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setSize(800,800);

frame.setVisible(true);

}

}

[2191 byte] By [bluedragonflya] at [2007-11-27 2:48:58]