Java I/O system

Java I/O system-general Linux technology-Linux programming and kernel information. The following is a detailed description. I. Input and Output
1. stream represents any data source capable of producing data or any receiving source capable of receiving data. In Java I/O, all streams (including Input and Out stream) have two types:
1.1 byte-oriented stream
A byte-oriented stream that reads or writes information to a stream in bytes. Byte-oriented streams include the following types:
1) input stream:
1) ByteArrayInputStream: uses a buffer in the memory as an InputStream.
2) StringBufferInputStream: Use a String object as InputStream.
3) FileInputStream: uses a file as InputStream to read the file.
4) PipedInputStream: implements the pipe concept and is mainly used in the process.
5) SequenceInputStream: combines multiple inputstreams into one InputStream.
2) Out stream
1) ByteArrayOutputStream: stores information in a buffer zone in the memory.
2) FileOutputStream: stores information in a file.
3) PipedOutputStream: implements the concept of pipe, which is mainly used in the process.
4) SequenceOutputStream: combines multiple outstreams into one OutStream.
1.2 Unicode Character-oriented stream
A Unicode-oriented stream that reads or writes information from a stream in units of Unicode characters. Unicode-oriented streams include the following types:
1) Input Stream
1) CharArrayReader: corresponds to ByteArrayInputStream
2) StringReader: corresponds to StringBufferInputStream
3) FileReader: corresponds to FileInputStream
4) PipedReader: corresponds to PipedInputStream.
2) Out Stream
1) CharArrayWrite: corresponds to ByteArrayOutputStream
2) StringWrite: no corresponding byte-oriented stream
3) FileWrite: corresponds to FileOutputStream
4) PipedWrite: corresponds to PipedOutputStream