类
String
Integer
Long
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)
最能让人感到快乐的事,莫过于经过一番努力后,所有东西正慢慢变成你想要的样子!