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/**  
 * JavaÀïÊý×Öת×Ö·û´®Ç°Ãæ×Ô¶¯²¹0µÄʵÏÖ¡£  
 *    
 */   
public class TestStringFormat {    
  public static void main(String[] args) {    
    int youNumber = 19;    
    // 0 ´ú±íÇ°Ãæ²¹³ä0    
    // 4 ´ú±í³¤¶ÈΪ4    
    // d ´ú±í²ÎÊýΪÕýÊýÐÍ    
    String str = String.format("%02d", youNumber);    
    System.out.println(str); // 01    
  }    
}   


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javaʹÓÃrocksawºÍvserv tcpipʵÏÖ»ùÓÚICMPµÄPing¹¦ÄÜ

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 1.  rocksaw-1.0.0-src.tar.gz
 2.  vserv-tcpip-0.9.2-src.tar.gz
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 1.  build vserv-tcpip-0.9.2-src
      ÔÚvserv-tcpip-0.9.2Ŀ¼ÏÂÃæ½¨Ò»¸ötestsĿ¼£¬È»ºóÔÚcmd´°¿ÚϽøÈë ......

java thread volatile Àí½â

 
   Java ThreadÓÐÒ»¸ö volatile¹Ø¼ü×Ö£¬Ö÷ÒªÓÃÀ´·ÀÖ¹¶àÏ̷߳ÃÎʹ«¹²±äÁ¿£¬²»Äܼ°Ê±±»ÆäËüÏß³ÌÕýÈ··ÃÎÊ, ¶øÔì³ÉµÄ²»Í¬²½ÎÊÌâ¡£
   ±ÈÈçThreadA ºÍThreadB ͬʱ·ÃÎÊÒ»¸ö int a = 0;  ²¢ÇÒÐ޸ģ¬
   ¿ÉÄÜ»áÔì³É ThreadA ÐÞ¸Äa±äÁ¿ºó£¬ThreadB·ÃÎÊa±äÁ¿»¹ÊÇÔ­À´µÄÖµ¡£
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Äêµ×ÊÕ²ØÏµÁÐ Java Web¹¤¾ßSessionTick

package org.lambdasoft.web.support;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;
import javax.servlet.http.HttpSession;
import org.apache.struts2.ServletActionContext;
import org.lambdasoft.web.Enviroment;
public class SessionSupport {
private SessionS ......

Äêµ×ÊÕ²ØÏµÁÐ Java Web¹¤¾ßCookieSupport

/*
* CookieSupport.java
* Copyright (C) 2007-3-19 <JustinLei@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version ......

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UTF-8¶ÔÖÐÎÄÓÃ3¸ö×Ö½ÚÀ´±íʾ
String s =”·ÉÏè”;
byte[] utf8 = s.getBytes(“utf-8”);//»ñµÃutf-8±àÂëµÄ×Ö½ÚÖµ
System….(new String(utf8,”gbk”);//ÓÃGBK±àÂë¸ñʽ¶ÔUTF-8±àÂë¸ñʽµÄ×Ö½ÚÊý×é½øÐнâÂ룬½«²úÉúÂÒÂë¡£
 
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