生成随机颜色代码

 

package com.gary.util;

import java.util.Random;

/**
 * 颜色工具
 * @author gary
 *
 */
public class ColorUtil {

	/**
	 * 生成随机颜色代码
	 * @return
	 */
	public static String getRandomColorCode(){
		//颜色代码位数
		int colorLength = 6;
		
		//颜色代码数组
		char[] codeSequence = { 'A', 'B', 'C', 'D', 'E', 'F', 
				'0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
		
		StringBuffer sb = new StringBuffer("#");
		Random random = new Random();
		for (int i = 0; i < colorLength; i++) {
			sb.append(codeSequence[random.nextInt(16)]);
		}
		return sb.toString();
	}
	
	public static void main(String[] args) {
		System.out.println(getRandomColorCode());
	}
}

 

 

JavaScript方式

 

function writeRandomColor(){
	var rand = Math.round(Math.random() * 0x1000000);
	var color = "00000".concat(rand.toString(16));
	document.write("#" + color.substr(color.length - 6, 6));
}