Name: aaR10142 Date: 06/26/2000


A JInternalFrame(String title, ...) constructors' behavior
is unspecified for null title parameter

The constructor accepts null title in jdk1.3,
and throws NPE for it in jdk1.4

Please specify the correct behavior and if it is needed to keep new one,
specify that the behavior was changed.

See example:

------------------example--------------------
import javax.swing.JInternalFrame;

public class Test {

    public static void main(String argv[]) {
        JInternalFrame f = new JInternalFrame(null);
        System.out.println("The title is \""+f.getTitle()+"\"");
     }

}
-------------------jdk1.3 output ---------------------------
The title is "null"
-------------------jdk1.4 output ---------------------------
Exception in thread "main" java.lang.NullPointerException
        at sun.awt.font.FontDesignMetrics.stringWidth(FontDesignMetrics.java:253)
        at javax.swing.plaf.metal.MetalInternalFrameTitlePane.getMinimumWidth(MetalInternalFrameTitlePane.java:367)
        at javax.swing.plaf.basic.BasicInternalFrameUI.installUI(BasicInternalFrameUI.java:102)
        at javax.swing.plaf.metal.MetalInternalFrameUI.installUI(MetalInternalFrameUI.java:72)
        at javax.swing.JComponent.setUI(JComponent.java:331)
        at javax.swing.JInternalFrame.setUI(JInternalFrame.java:308)
        at javax.swing.JInternalFrame.updateUI(JInternalFrame.java:323)
        at javax.swing.JInternalFrame.<init>(JInternalFrame.java:275)
        at javax.swing.JInternalFrame.<init>(JInternalFrame.java:206)
        at Test.main(Test.java:6)
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