Java IO stream

Classification of streams

1, according to the flow of flows into the input stream, output stream 2 kinds.

Input stream: Can only be read from, cannot write data to it;

Output stream: You can write to it only, and you cannot read the data from it.

Java input stream mainly by InputStream and reader as the base class, the output stream mainly by OutputStream and writer as the base class, 4 base classes are abstract class, cannot create the instance directly.

2. Byte stream and character stream

The data unit for a byte stream operation is a 8-bit byte, and the character stream is manipulated by 16-bit characters.

Byte stream mainly by InputStream and OutputStream as the base class, character stream mainly by reader and writer as the base class.

Java IO stream