example of polymorphism in java [closed]

Answer 1

Looks like homework to me, but I'm bored and Java makes me nostalgic.

List list = new ArrayList();
list.add(new A());
list.add(new A());
list.add(new B());

public void printAll() {
    for(A i : list) {
        System.out.println(i.print());
    }
}

class A {
    public String print() {
        return "A";
    }
}

class B extends A {
    @Override
    public String print() {
        return"B";
    }
}

The output would look like:

    A
    A
    B

The polymorphic part is when different code is executed for the same method call. The loop does the same thing everytime, but different instance methods may actually be getting called.