Luminance.java in program

Luminance.java

import java.awt.Color;

public class Luminance

{

    public static double lum(Color color)

       {

        int r = color.getRed();

        int g = color.getGreen();

        int b = color.getBlue();

        return .299*r + .587*g + .114*b;

        }

                 public static Color toGray(Color color)

        {

        int y = (int) (Math.round(lum(color)));  

        Color gray = new Color(y, y, y);

        return gray;

         }

        public static boolean compatible(Color a, Color b)

       {

        return Math.abs(lum(a) - lum(b)) >= 128.0;

        }

    public static void main(String[] args)

       {

        int[] a = new int[6];

        for (int i = 0; i < 6; i++)

        {

            a[i] = Integer.parseInt(args[i]);

        }

        Color c1 = new Color(a[0], a[1], a[2]);

        Color c2 = new Color(a[3], a[4], a[5]);

        System.out.println("c1 = " + c1);

        System.out.println("c2 = " + c2);

        System.out.println("lum(c1) =  " + lum(c1));

        System.out.println("lum(c2) =  " + lum(c2));

        System.out.println(compatible(c1, c2));

    }

}