four methods overload these methods

Write a program in java which has the following classes and methods: 

Class : OverloadDemo

Methods : test()

Declare four methods with the same name “test()” and overload these methods

class OverloadDemo{ 

public void test(){ 

System.out.println("It's a test method for null."); 

} 

public void test(int n){ 

System.out.println("It's a test method for displaying the int value "+n); 

} 

public void test(double d){ 

System.out.println("It's a test method for displaying the double value "+d); 

} 

public void test(String s){ 

System.out.println("It's a test method for displaying the String "+s); 

} 

} 

class overClass{ 

public static void main(String[] args) { 

OverloadDemo old = new OverloadDemo(); 

old.test(); 

old.test(12); 

old.test(25.35); 

old.test("Subham"); 

} 

}

OUTPUT:

It's a test method for null.

It's a test method for displaying the int value 12

It's a test method for displaying the double value 25.35

It's a test method for displaying the String Subham