Abstract classes and interfaces in Java serve fundamentally different purposes. Learn the differences between these Java language elements and how to use them in your programs.

We’ll begin by focusing on the new convenience factory methods that have been added to various interfaces in the Java Collections Framework. I’m using build 154 of the JDK 9 early access ...

Basically ComponentA depends on ComponentB. To enable unit-testing class ComponentAImpl, the implementation of interface ComponentB must be injected into ComponentAImpl. The Java code below shows the ...