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 Tools and Libs > Commons Lang3 > Random > Custom Random String

Custom Random String 

Apache Commons Lang 3.0 is a java library with lot of utilities and reusable components. This requires the library commons-lang3-3.0.1.jar to be in classpath. The following example shows using RandomStringUtils.random() API. It generates a random string of given length from the user provided characters.

File Name  :  
Author  :  Sudhakar KV
Email  :  [email protected]
package com.bethecoder.tutorials.commons_lang.tests.random;

import org.apache.commons.lang3.RandomStringUtils;

public class RandomCustomStringTest {

   @param args
  public static void main(String[] args) {
    char [] input = 'a''b''c''1''2''3' };
    //Random string of length 4
    System.out.println(RandomStringUtils.random(40, input.length, false, false, input))
    //Random string of length 6
    System.out.println(RandomStringUtils.random(60, input.length, false, false, input))

It gives the following output,


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