A frequently asked question in a Java interview is: How to implement a Java HashMap? Java job seekers must fully grok this important concept if they want to ace the interview. The HashMap tutorial ...

If you are fortunate enough to be using JDK 7, the newly available Objects class is the obvious (at least to me) choice for implementing the “common” Java object ...

I previously blogged on the Apache Commons ToStringBuilder and discussed how it takes away much of the tedium normally associated with implementing toString methods. While implementing toString() does ...

Let's say I have a class that encapsulates 2 other objects (Strings in my case, but could be anything). I want to override equals() and hashCode(), such that any 2 objects of my class with equal ...