Hi @praveen ,
We don't have the java implementation but we have Node.js implementation if it would help you.
Please download the code "World-Check One API for Node.js - v1.2 Collection" from downloads section on the Developers community(https://developers.thomsonreuters.com/customer-and-third-party-screening/world-check-one-api/downloads).Please let me know if you are facing issues to download the file.
Hope this helps.
Thanks
Rakesh