Accessing existing data

File processing is the process of creating, storing and accessing content of files. File processing can be used in opening saved files for read only purpose. It can be used to save a new file or displace the existing one. Through file processing you can make new files and save the existing files. You can also modify files through this process.

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A collection is a data structure – actually, an object – to hold other objects, which let you store and organize objects in useful ways for efficient access Check out the java.util package! Lots of interfaces and classes providing a general collection framework. Programmers may also provide implementations specific to their own requirements

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