It’s a problem one year before…  refer to: http://lyo.blogsome.com/2007/03/24/javautiltimer-diffs-in-j2me-j2se/

Today,I meet the problem again！After hours testing & coding, it was done！so exciting！^_^

Powerful ASM lib ( http://asm.objectweb.org/ )

==========

We need to replace 2 classes:  java.util.Timer & java.util.TimerTask  ( they must in the same package:( )

1. get both classes’ source codes from MIDP implement.
2. adapter user’s classes

     // deal with the super class
     public void visit(final int version, final int access, final String name,
            final String signature, final String superName, final String[] interfaces)
    {
        if(superName.equals("java/util/TimerTask"))
        {
            super.visit(version, access, name, signature, "xxx/xxx/xxx/SubTimerTask", interfaces);
            return;
        }
        else if(superName.equals("java/util/Timer"))
        {
            super.visit(version, access, name, signature, "xxx/xxx/xxx/Timer", interfaces);
            return;
        }
       
        super.visit(version, access, name, signature, superName, interfaces);
    }

    // deal with class members
   public FieldVisitor visitField(int access, String name,
            String desc, String signature, Object value)
    {
        if(desc.equals("Ljava/util/Timer;"))
            desc = "Lxxx/xxx/xxx/Timer;";
       
        return cv.visitField(access, name, desc, signature, value);
    }

3. adapter new Timer()   

    public void visitTypeInsn(final int opcode, final String desc)
    {
       ……….
        if(desc.equals("java/util/Timer"))
        {
            super.visitTypeInsn(opcode, "xxx/xxx/xxx/Timer");
            return;
        }
       ……….
    }

4. adapter method calls

    public void visitMethodInsn(int opcode, String owner, String name, String desc)
   {
       ……….
        if(owner.equals("java/util/Timer"))
        {
            if(desc.indexOf("java/util/TimerTask") != -1)
                desc = desc.replaceAll("java/util/TimerTask", "xxx/xxx/xxx/SubTimerTask");
           
            super.visitMethodInsn(opcode, "xxx/xxx/xxx/Timer", name, desc);
            return;
        }
        else if(owner.equals("java/util/TimerTask"))
        {
            super.visitMethodInsn(opcode, "xxx/xxx/xxx/SubTimerTask", name, desc);
            return;
        }
       ……….
    }

=========

This will be included in next version of KEmulator…