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, etc., easier.
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Java packages can be stored in compressed files called JAR files.Allowing classes to download faster as a group rather than one at a time.Programmers also typically use packages to organize classes belonging to the same category or providing the same functionality.You can refer write my essay for more answers.

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Packages are important for giving flexibility of classes separation. They can be used for:

  • separating projects
  • separating modules
  • separating application layers (business, web, dao)
  • further finer grained code separation

For example

com.mycompany.thisproject.thismodule.web

Could indicate the web layer of some module.

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