Berkeley CSUA MOTD:Entry 29789
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2026/05/26 [General] UID:1000 Activity:popular
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2004/2/10 [Computer/SW/Languages/Java] UID:29789 Activity:nil 76%like:29791
2/10    How come the following print 1,2 instead of 2,2? CONFUSED.
        class A{
        int m;
        public void Main(){
                B b;
                A a;
                b = new B();
                a = b;
                b.mb();
                a.m = 2;
                System.out.println(b.m);
                System.out.println(a.m);
        }
        }
        class B extends A{
        int m;
        public void mb(){
                m = 1;
        }
        }
2026/05/26 [General] UID:1000 Activity:popular
5/26    

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