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inheritanceMystery

Author: Whitaker Brand

Assume that the following classes have been defined:

public class A extends B {
    public void method2() {
        System.out.print("a 2 ");
        method1();
    }
}

public class B extends C {
    public String toString() {
        return "b";
    }

    public void method2() {
        System.out.print("b 2 ");
        super.method2();
    }
}
public class C {
    public String toString() {
        return "c";
    }

    public void method1() {
        System.out.print("c 1 ");
    }

    public void method2() {
        System.out.print("c 2 ");
    }
}

public class D extends B {
    public void method1() {
        System.out.print("d 1 ");
        method2();
    }
}

Given the classes above, what output is produced by the following code?

C[] elements = {new A(), new B(), new C(), new D()};
for (int i = 0; i < elements.length; i++) {
    System.out.println(elements[i]);
    elements[i].method1();
    System.out.println();
    elements[i].method2();
    System.out.println();
    System.out.println();
}
elements[0]: A
elements[1]: B
elements[2]: C
elements[3]: D

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