blue j (java) program to find square root

import java.io.*;
class xyz
{
    public static void main(String args[])throws Exception
    {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        double x;
        double y;
        System.out.println("Enter a number =");
        x=Double.parseDouble(br.readLine());
        y=Math.sqrt(x);
        System.out.println("The Square root is ="+y);
    }
}