In Java a Package is an organized and functionality based set of related interfaces and classes that belong to the same category or provide similar functionality. Classes facilitate class downloads in groups and may be stored in compressed files, like Java Archive called jar file. Package names should be unique and a package class may access package access members for other package classes. Generally Java Package may contain classes, interfaces, Java annotations and enumerated types. If we wants to create a class package then Package keyword is used in the source file for that class and is usually the first keyword in the source file.