Java Tutorial/Apache Common/RandomStringUtils

RandomStringUtils.random

   <source lang="java">

import org.apache.rumons.lang.RandomStringUtils; public class MainClass {

   public static void main(String[] args) {
       //Random 8 chars string from within the characters ABCDEF
       System.out.print("1) 8 char string using chars ABCDEF >>>");
       System.out.println(RandomStringUtils.random(8, "ABCDEF"));

   }

}</source>

1) 8 char string using chars ABCDEF >>>FAADCDAF

RandomStringUtils.random2

   <source lang="java">

import org.apache.rumons.lang.RandomStringUtils; public class MainClass {

   public static void main(String[] args) {
     //Random 8 chars string where letters are enabled while numbers are not.
     System.out.print("2) 8 char string using letters but no numbers >>>");
     System.out.println(RandomStringUtils.random(8, true, false));
   }

}</source>

2) 8 char string using letters but no numbers >>>dlNqQZlu

RandomStringUtils.random3

   <source lang="java">

import org.apache.rumons.lang.RandomStringUtils; public class MainClass {

   public static void main(String[] args) {
     //Random 8 chars string using only the elements in the array aChars
     //Only charcters between place 0 and 5 in the array can be used.
     //Both letters and numbers are permitted
     System.out.print("5) 8 char string using specific characters in an array >>>");
     char[] aChars = new char[] { "a", "1", "c", "2", "e", "f", "g" };
     System.out.println(RandomStringUtils.random(8, 0, 5, true, true, aChars));
   }

}</source>

4) 8 char string -Alphabets only >>>WOjFhopO

RandomStringUtils.randomAlphabetic

   <source lang="java">

import org.apache.rumons.lang.RandomStringUtils; public class MainClass {

   public static void main(String[] args) {
     //Random 8 chars string Alphabets only
     System.out.print("4) 8 char string -Alphabets only >>>");
     System.out.println(RandomStringUtils.randomAlphabetic(8));

   }

}</source>

4) 8 char string -Alphabets only >>>WOjFhopO

RandomStringUtils.randomAlphanumeric

   <source lang="java">

import org.apache.rumons.lang.RandomStringUtils; public class MainClass {

   public static void main(String[] args) {
     //Random 8 chars string Alphanumeric 
     System.out.print("3) 8 char Alphanumeric string >>>");
     System.out.println(RandomStringUtils.randomAlphanumeric(8));
   }

}</source>

3) 8 char Alphanumeric string >>>Nd6DuX5s

RandomStringUtils.randomNumeric

   <source lang="java">

import org.apache.rumons.lang.RandomStringUtils; public class MainClass {

 public static void main(String[] args) {
   // Begin Lottery code
   System.out.print("6) The two digit lucky number for the day is >>>");
   System.out.println(RandomStringUtils.randomNumeric(2));
   // End Lottery code
 }

}</source>

6) The two digit lucky number for the day is >>>96