Java内置包

• java.applet

• java.awt

• java.beans

• java.io

• java.lang

• java.math

• java.net

• java.nio

• java.rmi

• java.security

• java.sql

• java.text

• java.time

• java.util

• javax.accessibility

• javax.activation

• javax.activity

• javax.annotation

• javax.crypto

• javax.imageio

• javax.jws

• javax.lang

• javax.management

• javax.naming

• javax.net

• javax.print

• javax.rmi

• javax.script

• javax.security

• javax.sound

• javax.sql

• javax.swing

• javax.tools

• javax.transation

• javax.xml