java collections A Collection in simple terms means when a group of similar things, often a group created by someone is known as a collection. ... Methods Of Collection Interface.

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.

See the Java 101 Java interfaces tutorial for a more in-depth introduction to using interfaces in your Java programs, including where and where not to use default, static, and private methods.

Any Java developer who has interacted with a collection class would be familiar with methods such as add(), clear(), remove() and iterator(), all of which are defined in the Collection interface.