随机生成颜色

import java.util.Random;

/**
 * 颜色工具
 * 
 */
public class ColorUtil {

	/**
	 * 生成随机颜色代码
	 * 
	 * @return
	 */
	public static synchronized 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("#");
		StringBuffer sb = new StringBuffer();
		Random random = new Random();
		for (int i = 0; i < colorLength; i++) {
			sb.append(codeSequence[random.nextInt(16)]);
		}
		return sb.toString();
	}
	
	
	/**
	 * 获取十六进制的颜色代码.例如 "#6E36B4" , For HTML ,
	 * 
	 * @return String
	 */
	public static String getRandColorCode() {
		String r, g, b;
		Random random = new Random();
		r = Integer.toHexString(random.nextInt(256)).toUpperCase();
		g = Integer.toHexString(random.nextInt(256)).toUpperCase();
		b = Integer.toHexString(random.nextInt(256)).toUpperCase();
	 
		r = r.length() == 1 ? "0" + r : r;
		g = g.length() == 1 ? "0" + g : g;
		b = b.length() == 1 ? "0" + b : b;
	 
		return r + g + b;
	}

	public static void main(String[] args) {
		System.out.println(getRandomColorCode());
		
		System.out.println(getRandColorCode());
	}
}