Overridding Question?

[sonir shah]

Write a line of code that, when inserted at line 1, will make the overriding method in SubClass invoke the overridden method in BaseClass on the current object with the same parameter.

class BaseClass
{
   public void print(String s) {  System.out.println("BaseClass :"+s); }
}
class SubClass extends BaseClass 
{
   public void print(String s) 
   {
      System.out.println("SubClass :"+s);
      // Line 1
   }
   public static void main(String args[]) 
   {
      SubClass sc = new SubClass();
      sc.print("location");
   }
}

Answer : super.print(s);
According to me a call to a super method should come as the first statement, while it is not in this case.
Please explain.,
Sonir

[Arathi Rajashekar]

Hi Sonir,
Here it is a method. In method, the super can placed anywhere within the method. It need not be first statement. But if it is constructor then, call to super constructor should be first statement. Hope you got it

[sonir shah]

Ok Arathi
Same thing with 'this' statement?
I feel 'this'is only valid in Constructors..Am I right?
Sonir

[Arathi Rajashekar]

Originally posted by sonir shah:
Ok Arathi
Same thing with 'this' statement?
I feel 'this'is only valid in Constructors..Am I right?
Sonir

No its is valid even in method also
Check the following code

 public class overload{
public void over1(String s){
System.out.println(s);
}
public void over1(String s,int i){
this.over1(s);
System.out.println(i);
}
public static void main(String arg[]){
overload o=new overload();
o.over1("h");
o.over1("h1",2);
}
}
 

[Valentin Crettaz]

this can be used anywhere whether ina method or in a constructor. In a constructor it has to be the first statement. in a method it can be used anywhere but not in the same fashion as in a constructor, that is, in a method you can use this to refer to the current instance.
HIH