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 ...

Some language features are just plain ugly. The first time you see them, you say to yourself, “If I ever have to use that, there’s something wrong with my design.” And most of the time you’d be right.

Google is replacing its implementation of the Java application programming interfaces (APIs) in Android with OpenJDK, the open source version of Oracle’s Java Development Kit (JDK). The news first ...