Java Review of new IO

Buffers and buffer

1. The role of buffers

Java.nio.ByteBuffer

Java.nio.CharBuffer

Java.nio.ShortBuffer

Java.nio.IntBuffer

Java.nio.LongBuffer

Java.nio.FloatBuffer

Java.nio.DoubleBuffer

Position,limit,capacity

2. How the Buffer works

Ii. Channels (channel)

1. The role of the channel

2. Two-way operation of the channel to read and write

FileChannel ()

Memory mapping: Mappedbytebuffer reads the content fastest

Three Memory mapping modes

Third, file lock Filelock

The function and basic operation of file lock

Four, Character set

Wu, Selector

Serversocketchannel class, Socketchannel class

Java Review of new IO