1) MetalInternalFrameTitlePane() throws NPE if created with a default
Windows Look and Feel on WinNT under JDK 1.3, 1.3.1

To reproduce, please run the following test case on Win NT under JDK 1.3 or
JDK 1.3.1:

import javax.swing.*;
import javax.swing.plaf.metal.*;
import com.sun.java.swing.plaf.windows.*;

public class test {

    public static void main(String [] args) {
     
    WindowsLookAndFeel wlnf = new WindowsLookAndFeel();

        try {
            UIManager.setLookAndFeel(wlnf);

        } catch (UnsupportedLookAndFeelException ulnfe) {
            ulnfe.printStackTrace();
        }
        
        JInternalFrame frame = new JInternalFrame();
        MetalInternalFrameTitlePane c = new MetalInternalFrameTitlePane(frame);
       
    }

}

Test output:

java.lang.NullPointerException
at javax.swing.plaf.metal.MetalLookAndFeel.getPrimaryControlShadow(MetalLookAndFeel.java:1082)
at javax.swing.plaf.metal.MetalInternalFrameTitlePane.createButtons(MetalInternalFrameTitlePane.java:91)
at javax.swing.plaf.basic.BasicInternalFrameTitlePane.installTitlePane(BasicInternalFrameTitlePane.java:99)
at javax.swing.plaf.basic.BasicInternalFrameTitlePane.<init>(BasicInternalFrameTitlePane.java:77)
at javax.swing.plaf.metal.MetalInternalFrameTitlePane.<init>(MetalInternalFrameTitlePane.java:56)
at test.main(test.java:19)
Exception in thread "main"

After that test hangs

2) Same test under jdk1.4 doesn't produce the NullpointerException,
but also hangs on both windows and solaris.