Calling super class method

Question

I have class A which has a method sum().

Now class B extends class A and overrides sum() method, and

class C extends class B and also overrides sum() method.

Now I create an instance of class C.

My question is: How can I call class A's sum() method in class C through C instance? One of the way is call super.sum() in B and C. Is there any other way?

A obj = new C(); then call method obj.sum(); Or use super to call that method — Kick, Mar 12 '14 at 06:51
No, as per accepted answer of http://stackoverflow.com/questions/3456177/calling-super-super-class-method — Scary Wombat, Mar 12 '14 at 07:00
First you will have to call that method from the class `B` using `super.sum()` and create another method in your class `B` and from that method class `B` method call the super class `A` method and in your class `C` you call the class `B` method by creating instance of class `C`. This way it will first call first the class `B` method in which there is already called first class `A` method. This way it can work. — GrIsHu, Mar 12 '14 at 07:11
@RuntimeException You can refer the answer of "Seelenvirtuose" for that. — GrIsHu, Mar 12 '14 at 07:22

Shriram · Answer 1 · 2014-03-12T07:00:43.983

1

Inside B's & C's sum method place super() so that it will call A's sum method.

B extends A{
sum(){
super();
//dosomething..
}
}

edited Mar 12 '14 at 07:00

answered Mar 12 '14 at 06:52

Shriram

4,343
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score 1 · Answer 2 · answered Mar 12 '14 at 06:54

1

you can call A's sum in B using super.sum() but i don't think u can do that from C.

The best way would be to call super.sum() in both B's anc C's sum

answered Mar 12 '14 at 06:54

Raghvendra Singh

1,775
4
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score 1 · Answer 3 · answered Mar 12 '14 at 07:06

you can try like this :

class A{
    public void method() {
        System.out.println("a");
    }
}
class B extends A {
    public void method() {
        System.out.println("b");
    }
    public void callmethod(){
        super.method();
    }
}
class C extends B {
    public void method() {
        System.out.println("c");
    }
    public void callmethod(){
        super.callmethod();
    }
}
public class Test {

public static void main(String[] args) {
    C c = new C();
    c.callmethod();
}

}

score 1 · Accepted Answer · answered Mar 12 '14 at 07:07

There is no syntactical way of calling the method A.sum() inside any method of C. You need to place a bridging method inside B for doing that:

public class A {
    public void sum() { System.out.println("A.sum()"); }
}

public class B extends A {
    @Override
    public void sum() { System.out.println("B.sum()"); }
    protected final void superSum() { super.sum(); }
}

public class C extends B {
    @Override
    public void sum() { System.out.println("C.sum()"); }
    public void someMethod() {
        sum();
        super.sum();
        superSum();
    }
}

Calling C.someMethd() prints out

C.sum()
B.sum()
A.sum()

Calling super class method

4 Answers4

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