Berkeley CSUA MOTD:Entry 29791
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2026/06/03 [General] UID:1000 Activity:popular
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2004/2/10 [Computer/SW/Languages/Java] UID:29791 Activity:nil 76%like:29789
2/10    How come the following prints 1 and 2? If I do a=b, shouldn't
        they contain equivalent member variables?
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;
        }
}
2026/06/03 [General] UID:1000 Activity:popular
6/3     

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