1st、简单的随机手机号码

public Class ReducePwd(){
  public static void main(String[] args){
    String reduce = reduce();
    System.out.println(reduce);
  }
  public static String reduce(){
    Random ran=new Random();
    StringBuffer buffer=new StringBuffer();
    buffer.append("188");
    for (int i=0;i<8;i++){
       int num=ran.nextInt(10);
       buffer.append(num);
    }
    return buffer.toString();
  }

}