Java examples for 2D Graphics:Color Dark
Determines whether the given Color is more dark than light.
/*// www . j a v a 2 s . c o m * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ //package com.java2s; import java.awt.*; public class Main { /** * Determines whether the given {@code Color} is more dark than light. */ public static boolean isDark(Color c) { double whiteDist = distance(c, Color.WHITE); double blackDist = distance(c, Color.BLACK); return whiteDist > blackDist; } public static double distance(Color c1, Color c2) { float[] rgb1 = c1.getRGBColorComponents(null); float[] rgb2 = c2.getRGBColorComponents(null); double x = rgb2[0] - rgb1[0]; double y = rgb2[1] - rgb1[1]; double z = rgb2[2] - rgb1[2]; return Math.sqrt(x * x + y * y + z * z); } }