Sub JPanel Size

[Behrouz Hosseini]

Hi Every one,
I am trying to add some panels to my main Jpanel . I have three simple class as below. Every thing works fine except that I can not set the sub JPanels(pan1,pan2,pan3) size!
1-Class MyPanel
2-Class MyFrame
3-Class Main
I tried the setPreferredSize() method as well, but it did not work! Could you please let me know what I am doing wrong!?

  

   
 package mypaneltest;
import java.awt.Color;
import javax.swing.JPanel;

public class MyPanel extends JPanel {
    
public MyPanel(){
   
   this.setBackground(Color.RED);

   JPanel pan1 = new JPanel();
   pan1.setSize(90,40);
   pan1.setBackground(Color.BLUE);
   this.add(pan1);
   
   JPanel pan2 = new JPanel();
   pan2.setSize(80,50);
   pan2.setBackground(Color.YELLOW);
   this.add(pan2);
   
   JPanel pan3 = new JPanel();
   pan3.setSize(70,60);
   pan3.setBackground(Color.GREEN);
   this.add(pan3);
}
}
 =====================  
 package mypaneltest;  
 import javax.swing.JFrame;  
   
 public class MyFrame extends JFrame {  
 public MyFrame(){  
      super("Test");  
      setSize(300,200);  
      setLocationRelativeTo(null);  
   MyPanel pane = new MyPanel();  
   add(pane);  
 }  
 }  
 ======================  
 package mypaneltest;  
   
 public class Main {  
     public static void main(String[] args) {  
          new MyFrame().setVisible(true);  
     }  
 }  
 ======================  

  

Best Regards

[Michael Dunn]

> I tried the setPreferredSize() method as well, but it did not work!

worked OK for me