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What are the packaged character classes?

When reading Java tutorials in the Basic I / O section, use InputStreamReaderand OutputStreamWriterwhen not prepackaged character stream classes.

1) What is Pepackaged character stream classes? Does this mean that the file already has some text!

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This term is rather vague and in fact seems undefined, so a good question.

As I understand it, this means things such as FileInputStream, FileOutputStream, ByteArrayOutputStream, etc. Classes that wrap a specific stream for you and provide the functionality needed to work with it.

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