Java program to input the area of a square and find its perimeter

Write a program to input the area of a square and find its perimeter.

import java.util.*;
class Perimeter
{
	public static void main(int n)
	{
		Scanner sc=new Scanner(System.in);
		double a,s,p;
		System.out.println(“Enter the area of a square:”);
		a=sc.nextDouble();
		s=Math.sqrt(a);
		p=4*s;
		System.out.println(“Perimeter=”+p);
	}
}