Write a program in java to find the area, perimeter and diagonal of a rectangle.

import java.util.*;

class rectangle
{
    public static void main(String args[])
    {
        Scanner sc= new Scanner(System.in);
        int l,w,a,p;
        double d;
        System.out.println("Enter the length and width");
        l=sc.nextInt();
        w=sc.nextInt();
        a=l*w;
        p=2*(l+w);
        d=Math.sqrt(l*l+w*w);
        System.out.println("Area="+a);
        System.out.println("Perimeter="+p);
        System.out.println("Diagonal="+d);
    }
}