How to square a number in java

To square a number in java there are perform following step :-

Create Scanner class Object and pass System.in method to take input value.
sc.nextInt method read only int type value.
Declare one argument type test method with parameter n.
square are the numbers generated when a value is multiplied by itself.
Here i=n*n means 9=3*3 simply square a number itself.

				
					import java.util.*;

public class SquareNumber {

	int test(int n) {
		int i = n * n;
		return i;
	}

	public static void main(String[] args) {
		SquareNumber sn = new SquareNumber();
		Scanner sc = new Scanner(System.in);
		System.out.println("enter the number value :");
		int n = sc.nextInt();
		System.out.println("The square of a number is :- " + sn.test(n));

	}

}

Output :-
enter the number value :
12
The square of a number is :- 144