Java Interview Question and Answer What is Java Package Explain

Опубликовано: 16 Ноябрь 2013
на канале: Interview DOT

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Package is a collection of related classes and interfaces. package declaration should be first statement in a java class.

Packages are used in Java in order to prevent naming conflicts, to control access, to make searching/locating and usage of classes, interfaces, enumerations and annotations easier, etc.

A Package can be defined as a grouping of related types(classes, interfaces, enumerations and annotations ) providing access protection and name space management.

Some of the existing packages in Java are::
java.lang - bundles the fundamental classes
java.io - classes for input , output functions are bundled in this package
Programmers can define their own packages to bundle group of classes/interfaces, etc. It is a good practice to group related classes implemented by you so that a programmer can easily determine that the classes, interfaces, enumerations, annotations are related.

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