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 ...

A class like Person.java is often a data class that will need to be used in comparisons and possibly hashCode-based collection keys. It is important to create equals (Object) and hashCode () ...

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 ...