JToolTip fails to execute under WindowsLookAndFeel if .pack() method is used

Name: jbT81659 Date: 05/27/2001

OS: All Windows Platforms
JDK: JDK1.4.0-Beta-b65
Testcase: jToolTip.java

The following "java.lang.NullPointerException" is thrown when I try to run the test case jToolTip.java
under WindowsLookAndFeel under all windows platforms:

------------------------------------------------
I:\JDK1.4\LAF>java -Dswing.defaultlaf=com.sun.java.swing.plaf.windows.WindowsLookAndFeel jToolTip&
Exception in thread "main" java.lang.NullPointerException
        at com.sun.java.swing.plaf.windows.WindowsButtonUI.getPreferredSize(WindowsButtonUI.java:12
        at javax.swing.JComponent.getPreferredSize(JComponent.java:1176)
        at java.awt.GridLayout.preferredLayoutSize(GridLayout.java:316)
        at java.awt.Container.preferredSize(Container.java:951)
        at java.awt.Container.getPreferredSize(Container.java:935)
        at javax.swing.JComponent.getPreferredSize(JComponent.java:1178)
        at javax.swing.JRootPane$RootLayout.preferredLayoutSize(JRootPane.java:807)
        at java.awt.Container.preferredSize(Container.java:951)
        at java.awt.Container.getPreferredSize(Container.java:935)
        at javax.swing.JComponent.getPreferredSize(JComponent.java:1178)
        at java.awt.BorderLayout.preferredLayoutSize(BorderLayout.java:567)
        at java.awt.Container.preferredSize(Container.java:951)
        at java.awt.Container.getPreferredSize(Container.java:935)
        at java.awt.Window.pack(Window.java:409)
        at jToolTip.main(jToolTip.java:23)
------------------------------------------------
This problem is related to the pack() method used with Frame. If I use the frame.setSize(x, y) where x and y are any
integer valid numbers, then the problem is resolved.

To reproduce this bug:
1- Compile and run the following code "jToolTip.java"
2- Note that the above exception is thrown.
3- Change the following lines in the source code:
   frame.pack() to //frame.pack()
   //frame.setSize(300, 300) to frame.setSize(300, 300)
4- Compile and execute the example again
5- Note that application is displayed on screen.

----------Code------------------------
/* Copyright (c) Sun Microsystems 1998

$Header: /home-bazelet/sun/src/JDK1.4/standard/jToolTip.java,v 1.1 2001/05/04 07:12:47 isam Exp $

*/

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class jToolTip extends JApplet
{
        public void init()
        {
                TooltipPanel1 tooltip = new TooltipPanel1();
                getContentPane().add(tooltip);
        }

        public static void main(String[] argv)
        {
        JFrame frame = new JFrame("\u0645\u062b\u0627\u0644");
        frame.setContentPane(new TooltipPanel1());
        frame.pack();
        //frame.setSize(300, 300);
        frame.setVisible(true);
        frame.addWindowListener( new WindowAdapter()
        {
             public void windowClosing( WindowEvent e)
             {
                 System.exit(0);
             }
        });
        }
}
class TooltipPanel1 extends JPanel
{
        public TooltipPanel1()
        {
                setLayout(new GridLayout(5,1));
                UIManager.getDefaults().put("ToolTip.font",new Font("Lucida Sans Regular" , Font.PLAIN, 16));

                JButton Button1 = new JButton();
                JToolTip Button1TT = new JToolTip();

                Button1TT.setFont(new Font("Lucida Sans Regular",Font.PLAIN,12));
                Button1.setToolTipText ("\u0647\u0630\u0627\u0020\u064a\u0648\u0645\u0020\u0644\u0637\u064a\u0641\u0020\u05d6\u05d4\u0020\u05d9\u05d5\u05dd\u0020\u05e0\u05e2\u05d9\u05dd" );
                Button1.add(Button1TT);

                Button1.setFont(new Font("Lucida Sans Regular",Font.PLAIN,12));
                Button1.setText("\u062a\u0641\u0627\u062d\u0020\u0623\u062d\u0645\u0631\u0020\u0643\u0628\u064a\u0631\u0020\u0042\u0049\u0047\u0020\u0052\u0045\u0044\u0020\u0041\u0050\u0050\u004c\u0045\u0053\u0665\u0667\u0669\u0661");

                JButton Button2 = new JButton();
                Button2.setFont(new Font("Lucida Sans Regular",Font.PLAIN,12));
                Button2.setText("\u05d6\u05d5\u0020\u05e9\u05e0\u05d4\u0020\u05d9\u05e4\u05d4\u0020\u0054\u0048\u0045\u0020\u0059\u0045\u0041\u0052\u0020\u0031\u0039\u0035\u0038");
                Button2.setToolTipText ("\u05d6\u05d5\u0020\u05e9\u05e0\u05d4\u0020\u05d9\u05e4\u05d4\u0020\u0054\u0048\u0045\u0020\u0059\u0045\u0041\u0052\u0020\u0031\u0039\u0035\u0038");

                JButton Button3 = new JButton();
                Button3.setFont(new Font("Lucida Sans Regular",Font.PLAIN,12));
                Button3.setText("\u05ea\u05e4\u05d5\u05d6\u05d9\u05dd\u0020\u05d8\u05e2\u05de\u05d9\u05dd\u0020\u006c\u0069\u006d\u0065\u0020\u0069\u0073\u0020\u0067\u0072\u0065\u0065\u006e");
                Button3.setToolTipText ("\u05ea\u05e4\u05d5\u05d6\u05d9\u05dd\u0020\u05d8\u05e2\u05de\u05d9\u05dd\u0020\u006c\u0069\u006d\u0065\u0020\u0069\u0073\u0020\u0067\u0072\u0065\u0065\u006e");

                JButton Button4 = new JButton();
                Button4.setFont(new Font("Lucida Sans Regular",Font.PLAIN,12));
                Button4.setText("\u006c\u0069\u006d\u0065\u0020\u0069\u0073\u0020\u0067\u0072\u0065\u0065\u006e\u05d7\u05d5\u05de\u05d5\u05e1\u0020\u05d9\u05e7\u05e8");
                Button4.setToolTipText ("\u006c\u0069\u006d\u0065\u0020\u05d7\u05d5\u05de\u05d5\u05e1\u0020\u05d9\u05e7\u05e8\u0069\u0073\u0020\u0067\u0072\u0065\u0065\u006e");

                JButton Button5 = new JButton();
                Button5.setFont(new Font("Lucida Sans Regular",Font.PLAIN,12));
                Button5.setText("\u05d7\u05d5\u05de\u05d5\u05e1\u0020\u006c\u0069\u006d\u0065\u0020\u0069\u0073\u0020\u0067\u0072\u0065\u0065\u006e\u0020\u05d9\u05e7\u05e8");
                Button5.setToolTipText ("\u062a\u0641\u0627\u062d\u0020\u0623\u062d\u0645\u0631\u0020\u0643\u0628\u064a\u0631");
                add(Button1);
                add(Button2);
                add(Button3);
                add(Button4);
                add(Button5);
        }
}



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