Question

adding Jpanel to jframe

Asked by: jaxrpc

hi, i have 3 classes in java.
1)a class that extends Jframe
2)another that extends JPanel
3)a class that holds only the main method

In my main method of my 3rd class, it looks something like this.
but only the JFrame got shown and it seems that the JPanel i added did not go onto the JFrame.

public static void main(String args[]){
        
            
        
     NewJFrame myFrame = new NewJFrame();
      myFrame.getContentPane().add(new NewJPanel());
      myFrame.pack();
     myFrame.setVisible(true); 
    }

                                  
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Asked On
2008-09-09 at 04:56:45ID23715104
Tags

java

Topic

Java AWT & Swing

Participating Experts
1
Points
500
Comments
3

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Answers

 

by: naqlPosted on 2008-09-09 at 07:14:07ID: 22427560

I presume you're adding some stuff to your panel to make it custom in some way.  So, the following worked just fine for me.  If yours isn't working, examine thelayouts you're using.  You may want to post your JPanel and JFrame classes. 


public class TestFrame extends javax.swing.JFrame {
}
 
public class TestPanel extends javax.swing.JPanel {	
  public TestPanel() { 
      this.add(new javax.swing.JLabel("TestPanel"));
      this.setBorder(javax.swing.border.LineBorder.createBlackLineBorder());
  }
}
 
public class TestMain {
  public static void main(String args[]){
    TestFrame myFrame = new TestFrame();
    myFrame.getContentPane().add(new TestPanel());
    myFrame.pack();
   myFrame.setVisible(true); 
  }
}

                                              
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by: jaxrpcPosted on 2008-09-09 at 07:25:48ID: 22427685

hi naql,

i found out that it was my layout because when i switched to flowlayout it works fine.

Sorry off the topic.

lets say i have a Jtree in my panel and i have a button in another panel . (both are panels with some custom methods) upon clicking on the button...i would like to make changes to the JTree. How do i make them communicate?

 

by: naqlPosted on 2008-09-09 at 08:15:33ID: 22428285

Well, that's your other separate question, which I just answered on that thread.

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