java随机生成十六进制颜色

/**
     * 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;
 }