Big O Syndrome

How HashMap works in java? things that really matter!

Disable multiple logins for same user - Servlets and Sessions

Searching for a String in (a) JAR file - Java

Object re-usability and mutable objects

Docx4j - Replace Text Placeholders with Images in Microsoft Word Documents

the child abuse

The Myth of Static and Final Methods.

getRequestDispatcher() and getNamedDispatcher of the ServletContext

equals vs == and HashMap vs IdentityHashMap

ThreadLocal and Servlets

Java Class Loaders