What are the methods and usage scenarios of using Buffer for IO stream operations in Java?

Using Buffer for I/O stream operations

In addition to NIO, there are two basic methods for using Java to perform I/O operations:

1. Use the method based on InputStream and OutputStream; (byte stream)

2. Use Writer and Reader. (Character stream)

No matter which method is used for file I/O, if buffering can be used reasonably, I/O performance can be effectively improved.

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