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Java

Posted by hunche
hunche
3,339 Points

Why my JPanel doesn't show in JFrame

public class Sample7 { private JFrame f; private JPanel p; private JButton b1; private JLabel lab;

public static void main(String args[]) { new Sample7(); }

public Sample7() { gui(); }

public void gui() { f = new JFrame("Creativity tuts"); f.setVisible(true); f.setSize(600,1200); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

p=new JPanel();
p.setBackground(java.awt.Color.RED);

b1=new JButton("Test");
lab =new JLabel("This is test label");

p.add(b1);
p.add(lab);

} }

2 Answers

Jeremy Hill
Jeremy Hill
29,567 Points
Jeremy Hill
Jeremy Hill
29,567 Points

make sure that the JFrame adds the panel. After your panel adds all of the items then add your panel to your JFrame. Like this:

JPanel panel = new JPanel();
panel.add(someStuff);
panel.add(someMoreStuff);

JFrame frame = new JFrame();
frame.add(panel);
Jeremy Hill
Jeremy Hill
29,567 Points
Jeremy Hill
Jeremy Hill
29,567 Points

Or you could do it this way:

import javax.swing.JPanel;

public class MyPanel extends JPanel {
  //some code goes here
}
//****************************************************
import javax.swing.JFrame;

public class runPanel{

   public static void main(String[] args){

      JFrame frame = new JFrame();

      MyPanel myPanel = new MyPanel();

      frame.add(myPanel);
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setVisible(true);
      frame.setSize(500, 500);

   }

}