java IO streams in what?

• According to the data flow: the input and output streams

Inputs and outputs are from the perspective of the program is.

Input stream: data flow program

Output stream: data flows from the program.
    

• By the processing unit: byte stream and character stream

Byte stream: one is read into or read 8-bit binary

Character stream: once read in or out is a 16-bit binary

JDK is a suffix byte Stream stream; suffix Reader, Writer character stream

 

• Function Function: node flow and processing flow

Node Stream: source connected directly to the data, read or write

Process streams: one stream using the node, the node based on the stream, and then a layer of sheathing

 

The most fundamental of four categories: InputStream (input stream of bytes), OutputStream (output stream of bytes), Reader (character input stream), Writer (character output stream)

Extended four categories, according to the processing unit to distinguish

1. InputStream：FileInputStream、PipedInputStream、ByteArrayInputStream、BufferedInputstream、SequenceInputStream、DataInputStream、ObjectInputStream
2. OutputStream：FileOutputStream、PipedOutputStream、ByteArrayOutputStream、BufferedOutputStream、DataOutputStream、ObjectOutputStream、PrintStream
3. Reader：FileReader、PipedReader、CharArrayReader、BufferedReader、InputStreamReader
4. Writer：FileWriter、PipedWriter、CharArrayWriter、BufferedWriter、InputStreamWriter、PrintWriter

 

Commonly used flow

1. The file operations: FileInputStream (input stream of bytes), FileOutputStream (output stream of bytes), FileReader (character input stream), FileWriter (character output stream)
2. The pipeline operation: PipedInputStream (input stream of bytes), PipedOutStream (output stream of bytes), PipedReader (character input stream), PipedWriter (character output stream)
3. Byte / character array: ByteArrayInputStream, ByteArrayOutputStream, CharArrayReader, CharArrayWriter
4. Buffered 缓冲流：BufferedInputStream、BufferedOutputStream、BufferedReader、BufferedWriter
5. Converted to byte character stream: InputStreamReader, OutputStreamWriter
6. Stream: DataInputStream, DataOutputStream
7. Print streams: PrintStream, PrintWriter
8. Object flow: ObjectInputStream, ObjectOutputStream
9. Serialization stream: SequenceInputStream

 

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