Over a million developers have joined DZone.

How to Generate a Random String in Java using Apache Commons Lang

· Integration Zone

Is iPaaS solving the right problems? Not knowing the fundamental difference between iPaaS and dPaaS could cost you down the road. Brought to you in partnership with Liaison Technologies.

In a previous post, we had shared a small function that generated random string in Java. It turns out that similar functionality is available from a class in the extremely useful apache commons lang library.

If you are using maven, download the jar using the following dependency:


The class we are interested in is RandomStringUtils. Listed below are some functions you may find useful.

  • Generate and print a random string of length 5 from all characters available
  • Generate and print random string of length 10 from upper and lower case alphabets
  • Generate and print a random number of length 12
  • Generate and print a random string of length 5 using only a, b, c and d characters
    System.out.println(RandomStringUtils.random(10,new char[]{'a','b','c','d'}));

Discover the unprecedented possibilities and challenges, created by today’s fast paced data climate and why your current integration solution is not enough, brought to you in partnership with Liaison Technologies.


Published at DZone with permission of Faheem Sohail, DZone MVB. See the original article here.

Opinions expressed by DZone contributors are their own.

The best of DZone straight to your inbox.

Please provide a valid email address.

Thanks for subscribing!

Awesome! Check your inbox to verify your email so you can start receiving the latest in tech news and resources.

{{ parent.title || parent.header.title}}

{{ parent.tldr }}

{{ parent.urlSource.name }}