Java Tutorial/Apache Common/RandomStringUtils

RandomStringUtils.random

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"));

    }
}

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

RandomStringUtils.random2

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));
    }
}

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

RandomStringUtils.random3

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));
    }
}

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

RandomStringUtils.randomAlphabetic

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));

    }
}

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

RandomStringUtils.randomAlphanumeric

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));
    }
}

3) 8 char Alphanumeric string >>>Nd6DuX5s

RandomStringUtils.randomNumeric

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
  }
}

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