collection

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An array is a container object that holds a fixed number of values of a single type. http://download.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html

Arrays (The Java™ Tutorials > Learning the Java Language > Language Basics)

All Known Subinterfaces: BeanContext , BeanContextServices , List , Set , SortedSet All Known Implementing Classes:

Collection (Java 2 Platform SE v1.4.2)

http://download.oracle.com/javase/1.4.2/docs/api/java/util/Collection.html
A collection — sometimes called a container — is simply an object that groups multiple elements into a single unit.

Lesson: Introduction to Collections (The Java™ Tutorials > Collections)

http://download.oracle.com/javase/tutorial/collections/intro/index.html