Java Sample: Method Overriding, Overloading and Constructor, this keyword

import java.io.*;
class A
{
public int sum(int i,int j)
{
return(i+j);
}
}

class B extends A
{
public float sum(float i,float j) // Method Overriding
{
return(i+j);
}

B() // Constructor is using to run SUM method by THIS keyword
{
System.out.println(this.sum(22.95F,66.52F));
}
}

class Jtest
{
public static void main(String args[])
{
A oA=new A();
System.out.println(oA.sum(6,5));
B oB=new B();
System.out.println(oB.sum(90.50F,66.52F)); // Overring Is Calling...
System.out.println(oB.sum(22,44)); // Method is Overloading....
//oB.goAction();

}
}