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java下如何进行计时？

long startTime=System.currentTimeMillis();
// do something
long endTime=System.currentTimeMillis();
long spentTime=(endTime-startTime)/1000;

如果我在"do somethings"中修改了系统时间，接下来又如何计时，获取正确的spentTime。

似乎可以通过获取CPU运行的时间来进行，但是� ......

java提交页面请求的问题。

有这样一个页面，是用来查询彩票开奖情况的。
HTML code:

<tr>
<td height="27" bgcolor="#FF8C01"><div align="center">
<table width="644" border="0" cellspacing="0" cellpadding="0">
......

java socket空异常！

package com.Socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
private ServerSocket ss;
private Socket socke ......

JAVA DEVELOPER , PART TIME

Position Title: Java-J2EE Developer

Desired Start Date: Immediately
Location: China

Number of Positions: 1

Description of Duties:

Nonillion Limited seeks a Java/J2EE Developer who will be part of a team responsible for the development of multiple ......

java 控制台输入

怎样在Eclipse控制台中输入 java base
然后通过args[]输出

Java code:

public static void main(String[] args){
String str;
BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));// 键盘输入
BufferedReader bufin = new BufferedReader(stdin);
......

mapxtreme for java 如何在图层画线？

查API，看到FeatrueFactory有这个方法
public Feature createPolyLine(double[][] thePoints,
Rendition rend,
......

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