Frames

[System_Error]

Try this small example and see if you can adapt it in your program:

OtherFrame.java -- Frame you'll be setting the visibility of

import javax.swing.*;
import java.awt.*;
public class OtherFrame extends JFrame
{  
   public OtherFrame()
   {
       JButton btnVisible = new JButton("I do Nothing");
       JButton btnInvis = new JButton("Neither do I");
       Container content = getContentPane();
       content.setLayout(new FlowLayout());
       content.add(btnVisible);
       content.add(btnInvis);
       setSize(200,60);
       setVisible(true);
   }
}

Test2.java -- The main frame with buttons that set the visibility

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Test2 extends JFrame implements ActionListener
{
   private OtherFrame otherFrame;
   private JButton btnVisible = new JButton("Visible");
   private JButton btnInvis = new JButton("Invisible");
   
   public Test2()
   {
       otherFrame = new OtherFrame();
  
       btnVisible.addActionListener(this);
       btnInvis.addActionListener(this);
       
       Container content = getContentPane();
       content.setLayout(new FlowLayout());
       content.add(btnVisible);
       content.add(btnInvis);
       
       setSize(200,60);
       setVisible(true);
   }
   
   public void actionPerformed(ActionEvent ae)
   {
      if (ae.getSource() == btnVisible)
      {
           otherFrame.setVisible(true); 
      }
      else if (ae.getSource() == btnInvis)
      {
           otherFrame.setVisible(false);
      }
   }
   
   public static void main(String[] args)
   {
      Test2 t = new Test2();
   }    
}