Do you need to know how to sort Java objects in a collection, array, or map? Here's how to use the Comparable and Comparator interfaces and avoid ClassCastExceptions. Programmers frequently need to ...

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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 ...

I'm working with a code base that currently uses both collections4 and guava (and some LambdaJ), and I'm thinking of making a strong push towards eliminating one or the other. A bunch of stuff I've ...