类 
Byte

Short
Integer
Long 

Float

Double

Boolean

Char
File 
Date
Thread
(java.lang.Thread
Thread类的定义:public class Thread extends Object implements Runnable
)
===========================
包 
java.lang.*;
java.io.*;
java.util.*;
java.sql.*; 
java.math.*; 
=======================
接口:
Comparable 
Collection
Map
List
Runnable(java.lang.Runnable 该接口的定义public interface Runnable)

posted on 2017-11-29 11:24  毛会懂  阅读(237)  评论(0编辑  收藏  举报