How to create parameterized constructors in java

2.Parameterized constructor:-A constructor that hava parameters is known as parameterized constructor.
 
class Cons{

int x,y;

Cons(int a, int b){

x=a;

y=b;

}

public void mult(){

int m=x*y;

System.out.println("Multiplication of two numbers is "+m);

}

public static void main(String args[]){

Cons obj=new Cons(5,4);

obj.mult();

}

}

OUTPUT:- 

C:\Users\Satyendra\Desktop>javac 1.java

C:\Users\Satyendra\Desktop>java Cons

Multiplication of two numbers is 20