In this Java 101 tutorial, I’ve explained how interfaces differ from classes, and showed you how to declare, implement, and extend interfaces in your Java programs.

Java’s interface language feature confuses many Java newbies. Many mistakenly assume that interfaces only sidestep Java’s failure to support multiple implementation inheritance. In reality ...

If you want to take advantage of sorting methods in Java, you'll need to implement the Comparable interface.

An example of a lambda function in a Java program. In Java, there are many, many places in which a piece of code needs a single method implementation. And there are many interfaces in the Java API ...