Useful Packages in Java

Posted on In , ,

A simple conclusion of some useful packages in java.

java.io

Classification by type of stream

Stream of characters

Reader
Writer

Stream of bytes

InputStream
OutputStream

Classification by operation object

File

Array

ByteArray
CharArray

Pipe

Data (basic data types)

Buffer

Print

Object serialization

Stream transformation

java.lang

System

Process

Thread

Run

Stack

Exception - Throwable

Error
Exception

Annotation

java.lang

java.lang.annotation

Interface

java.lang

java.lang.reflect

Type

Basic type

Class

Package

Other

Tool class

Character serial

Math

NOTICE: not java.math

Reflection

java.lang.reflect

java.math

NOTICE: not java.lang.Math

To be continued

java.net