NetBeans IDE Dev (Build 20070419-0559)
1.6.0_02-ea; Java HotSpot(TM) Client VM 1.6.0_02-ea-b02
Linux version 2.6.5-1.358 running on i386
en_US (nb); UTF-8

NPE when calling extract super class. New super class contains only default
constructor and not selected elements.

Steps to reproduce:
1) have a class:
public class MyClassRen {
       
    public void xxxx() {
        
    }
    
    public String name;
            
}

2) call extract supers class
3) check both checkboxes to extract both elements and confirm
-> java.lang.NullPointerException
        at
org.netbeans.modules.java.source.save.CasualDiff.isCommaSeparated(CasualDiff.java:2608)
        at
org.netbeans.modules.java.source.save.CasualDiff.filterHidden(CasualDiff.java:1837)
        at
org.netbeans.modules.java.source.save.CasualDiff.diffClassDef(CasualDiff.java:330)