how to use super

[Cherry Sta. Romana]

Is it possible to call methods from the top of a class hierarchy using super?

Example:
class C1 {
public void method() {
System.out.println("C1");
}
}
class C2 extends C1 {
public void method() {
super.method();
System.out.println("C2");
}
}
class C3 extends C2 {
public void method() {
// can I also call the method in C1 here
}
}
Can I also call the method in C1 inside the method in C3?
Thanks.

[Ragu Sivaraman]

Originally posted by Cherry Sta. Romana:
Is it possible to call methods from the top of a class hierarchy using super?

Example:
class C1 {
public void method() {
System.out.println("C1");
}
}
class C2 extends C1 {
public void method() {
super.method();
System.out.println("C2");
}
}
class C3 extends C2 {
public void method() {
// can I also call the method in C1 here
}
}
Can I also call the method in C1 inside the method in C3?
Thanks.

I think you can only go one step up in your inheritence
hierarchy

[Ashik Uzzaman]

Hi,
I completely agree with Ragu. U cannot call the most top class's method directly rather go one step up in your inheritence heirarchy i.e. one-by-one.
See the slightly modified code below :

class C1 {
public void method() {
System.out.println("C1");
}
}
class C2 extends C1 {
public void method() {
super.method();
System.out.println("C2");
}
}
class C3 extends C2 {
public void method() {
/** U can only call the method in C2 here which in turn will call the method in C1. */
super.method();
System.out.println("C3");
}
public static void main(String []a)
{
new C3().method();
}
}

------------------
azaman

[Cherry Sta. Romana]

Thanks to both of you. My friend was asking about this and I said that I don't think that it is possible. However, we both attended a training on Java and we both remember that our trainor said that it is possible using some form of super.super.. Anyway, we mis-understood it probably.
Thanks again.

[April.Johnson]

IF your instructor said that, I'd consider getting another instructor.
April

Originally posted by Cherry Sta. Romana:
Thanks to both of you. My friend was asking about this and I said that I don't think that it is possible. However, we both attended a training on Java and we both remember that our trainor said that it is possible using some form of super.super.. Anyway, we mis-understood it probably.
Thanks again.

[Guy Reynolds]

Perhaps he/she was referring to the fact that super actually refers to the next feature up the inheritance hierarchy, regardless of whether that is the immediate superclass or not. In this way, c3 could invoke c1's "method" directly...
Example:
<code>
class C1 {
public void method() {
System.out.println("C1");
}
}
class C2 extends C1 {
//public void method() {
//super.method();
//System.out.println("C2");
//}
}
class C3 extends C2 {
public void method() {
super.method()
System.out.println("C3");
}
}
</code>
Since C2 did not override "method", the call to super.method in C3 would invoke the method from C1.
Maybe this is what your instructor was talking about...
Either way, super.super is definately not legal.