How to make a method thread-safe in Java?

http://www.programcreek.com/2014/02/how-to-make-a-method-thread-safe-in-java/

How to Easily Load Test With Open Source Tools

https://dzone.com/articles/how-to-easily-load-test-with-open-source-tools

Creating Object Pool in Java

https://dzone.com/articles/creating-object-pool-java