create Number Random - Java java.lang

Java examples for java.lang:int

  1. HOME
  2. Java
  3. java.lang
  4. int

Description

create Number Random

Demo Code


//package com.java2s;

public class Main {
    public static final String ALL_NUMBER_VALUE = "0123456789";

    public static String createNumberRandom(int length) {
        if (length < 1) {
            throw new IllegalArgumentException(
                    "length cannot be less than 1");
        }/*  ww  w.  j  av  a2s  . c  om*/
        int vLen = ALL_NUMBER_VALUE.length();
        String result = "";
        for (int i = 1; i <= length; i++) {
            double dr = Math.random() * vLen;
            int ir = (int) Math.floor(dr);
            result += ALL_NUMBER_VALUE.charAt(ir);
        }
        return result;
    }
}

Related Tutorials