When you implement an interface method (by overriding the interface’s method header), remember that all of the methods whose headers are declared in the interface are implicitly declared public.

Method references in Java are part of the broader set of features introduced and enhanced in Java 8 and beyond. They are a concise way to refer to methods of classes or objects.

If you want to take advantage of sorting methods in Java, you'll need to implement the Comparable interface. Written by David Petersheim, Contributor Feb. 17, 2005 at 8:00 a.m. PT ...

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 where only a single method needs to be implemented.