Analysis of the inheritance structure of common IO operation classes in Java _java

IO Common IO operation class inheritance structure

Io	Character streams	Reader (source)	BufferedReader	LineNumberReader
InputStreamReader	FileReader (a bridge that bytes flow to character streams)
StringReader
Writer (Purpose)	BufferedWriter
OutputStreamWriter	FileWriter (the bridge of character circulation to the byte stream)
StringWriter	Empty
PrintWriter	Empty
Word throttling	InputStream (source)	FileInputStream	Empty
Sequenceinputstream	Merge stream
Bytearrayinputstream	At the time of construction, the data source needs to be received and the data source is a byte array;
OutputStream (Purpose)	FileOutputStream	Empty
Bytearrayoutputstream	A variable-length byte array is defined internally, which is the data destination;