/home/wpollock1/public_html/Java/Popup.java

// This program creates a blank pop-up window inside a Frame.
// The pop-up window appears and disappears when the user clicks
// the mouse in the main window ("myFrame", not "myWin").
// Written 1999 by Wayne Pollock, Tampa FL USA.

import java.awt.*;
import java.awt.event.*;

public class Popup
{   static Window myWin;

    public static void main ( String [] args )
    {   Frame myFrame = new Frame( "Wonder Window!" );
        myFrame.setSize( 350, 200 );
        myFrame.setBackground( Color.CYAN );
        myFrame.setVisible( true );

        myWin = new Window( myFrame );  // A pop-up window
        // setBounds() is equal to setSize() and setLocation():
        myWin.setBounds( 30, 30, 100, 100 );
        myWin.setBackground( Color.BLUE );
        myWin.setVisible( true );

        myFrame.addWindowListener( new WindowAdapter()
            {   public void windowClosing ( WindowEvent we )
                {   System.exit( 0 );
                }
            }
        );

        myFrame.addMouseListener( new MouseAdapter ()
            {   public void mouseClicked ( MouseEvent e )
                {   myWin.setVisible( ! myWin.isVisible() );
                }
            }
        );
    }
}