I am trying to make a test case that will check all 8 mask of
MaskFormatter for JFormattedTextField.
I have a JFormattedTextField with MaskFormatter (with (###) ###-####
mask ) as the formatter JFTF.
When I call ftf.setText(null) for this mask, it is giving me NPE
.
Steps to reproduce:
-------------------
1) Compile and Run the attached code.

Other details are :
 
 OS- Win2k Prof
 
 Java Versions:
 (1)
 java version "swing-jcg-win-01-2003-08-09-int.tiger" Java(TM) 2 Runtime Environment, Standard Edition (build swing-jcg-win-01-2003-08 -09-int.tiger)
 Java HotSpot(TM) Client VM (build 1.5.0-beta-b14, mixed mode)
 
 (2)
 
 java version "1.5.0-beta"
 Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0-beta-b15)
 Java HotSpot(TM) Client VM (build 1.5.0-beta-b15, mixed mode)

The stack trace of the NPE is as Follows:

java.lang.NullPointerException
        at javax.swing.text.MaskFormatter.isLiteral(MaskFormatter.java:561)
        at javax.swing.text.MaskFormatter.canReplace(MaskFormatter.java:730)
        at javax.swing.text.DefaultFormatter.replace(DefaultFormatter.java:561)
        at javax.swing.text.DefaultFormatter.replace(DefaultFormatter.java:534)
        at javax.swing.text.DefaultFormatter$DefaultDocumentFilter.replace(DefaultFormatter.java:738)
        at javax.swing.text.AbstractDocument.replace(AbstractDocument.java:660)
        at javax.swing.text.JTextComponent.setText(JTextComponent.java:1411)
        at FormattedSample_Mask.testFormattedNumber(FormattedSample_Mask.java:415)
        at FormattedSample_Mask.runTest(FormattedSample_Mask.java:145)
        at FormattedSample_Mask.<init>(FormattedSample_Mask.java:138)
        at FormattedSample_Mask.main(FormattedSample_Mask.java:31)

It is also observed on Linux RH and Solaris.