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A list of classes, sub-packages, and interfaces is PACKAGE in Java. It helps organize the classes into a framework for the folder and makes it easy to find and use them. More importantly, it helps increase the reusability of code. Java package has a uniqu...

The principle of object-oriented programming that "shows" only important attributes and "hides" unnecessary information is an abstraction. The main aim of abstraction is to hide the users' unnecessary data.