随机数组合，随机号码产生器

      Java代码

      1.public class RandomUtil {

      2.

      3.    private static Random random = new Random();

      4.

      5.

      6.    public static String getRandomNumber(String[] range,int rangeLength,int length){

      7.        StringBuffer sb = new StringBuffer();

      8.        for(int i=0;i<length;i++){

      9.            sb.append(String.valueOf(range[random.nextInt(rangeLength)]));

      10.        }

      11.        return sb.toString();

      12.    }

      13.    public static void main(String[] args) {

      14.        String[] range = {"0","1","2","3","4","5","6","7","8","9"};

      15.        System.out.println(getRandomNumber(range, 10, 8));

      16.

      17.    }

      18.}

      运行结果：

      91373770