Ò׽ؽØÍ¼Èí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

¹ØÓÚjavaÖеÄÊýÖµ¼ÆËã

¼ÇµÃÔÚcsdnµÄij¸öÌû×ÓÖÐÌáµ½¼ÆËã½×³ËµÄÌÖÂÛ£¬µ±Ê±ÓкܶàÈ˶¼Ìá³öÁË×Ô¼ºµÄËã·¨£¬Ã¿¸öÈ˶¼ÏëµÄºÜÖÜÈ«¡£
ÕâÁ½ÌìÕýºÃ×Ô¼º¿´µ½ÁËÏà¹ØµÄÎÄÕ£¬ÄÇô×ܽáÕûÀíһϣ¬ÒÔ¹©´ó¼Ò²Î¿¼£¬Ò²ÎªÁË×Ô¼ºµÄ֪ʶ×ܽᡣ
ÔÚÊýѧÖУ¬Ö»ÓзǸºÕûÊý²ÅÓн׳ËÔËË㣬Òâ˼¾ÍÊÇ˵¸¡µãÊý¡¢¸ºÕûÊý¶¼²»ÄܽøÐмÆË㣬ÄÇôÎÒÃÇÔÚ¿¼ÂǼÆËãʱ£¬Ð¡ÓÚ0µÄÊý×ÖÎÒÃÇÊDz»¿¼ÂǼÆËãµÄ¡£ÔÚ¼ÆËã»úÖУ¬ÕûÊýµÄ×î´óȡֵ·¶Î§ÎªlongÐÍ£¬ÄÇô¼ÆËã½×³Ë×ÜÓлᳬ¹ý¼ÆËã»úÊýÖµÀàÐ͵ÄÓÐЧ·¶Î§¡£
Èç¹ûÎÒÃÇ¿¼ÂÇʹÓÃlong×÷Ϊ·µ»ØÀàÐÍ£¬ÄÇôÕâÊÇÓз¶Î§µÄ½×³ËÔËË㣬´úÂë¿ÉÒÔÈçÏ£º
//ÎҵIJÙ×÷ϵͳÊÇ32λµÄXP£¬¿ÉÒÔ¼ÆËã20ÒÔÄڵĽ׳Ë
//½×³Ë¼ÆËãµÄÊýÖµ±ØÐë´óÓÚµÈÓÚ0£¬Èç¹ûСÓÚ0²»¼ÆËã
//0µÄ½×³Ë¼ÆËãֵΪ1
if ( n < 0 || n > 20 ) { //½øÐз¶Î§¼ì²é
        return -1;
} else if ( n == 0 ) {
       return 1;
} else {
      long result = 1;
      for ( ; n > 0 ; n -- ) {
             result *= n;
      }
      return result;
}
ÄÇôÈç¹û¼ÆËã´óµÄÊýÖµ½×³Ëʱ£¬ÔõôËãÄØ£¿
javaÖÐÌṩÁËÏàÓ¦µÄ´¦Àí°ì·¨£¬²ÉÓÃBigIntegerÀ´¼ÆË㣬´úÂëÈçÏÂ
if ( n < 0 ) {
      return new BigInteger("-1");
} else if ( n == 0 ) {
      return new BigInteger("1");
} else {
     BigInteger result = new BigInteger("1");
     for ( ; n > 0 ; n -- ) {
             result = result.multiply(new BigInteger(new Integer(n).toString());
     }
     return result;
}


Ïà¹ØÎĵµ£º

JavaµÄ¿çƽ̨

JavaµÄ¿çƽ̨ÊÇͨ¹ýJavaÐéÄâ»ú£¨JVM£©À´ÊµÏֵġ£
      JavaÔ´ÎļþµÄ±àÒë¹ý³Ì
             JavaÓ¦ÓóÌÐòµÄ¿ª·¢ÖÜÆÚ°üÀ¨±àÒë¡¢ÏÂÔØ¡¢½âÊͺÍÖ´Ðм¸¸ö²¿·Ö¡£Java±àÒë³ÌÐò½«JavaÔ´³ÌÐò·­ÒëΪJVM¿ÉÖ´ÐдúÂë—×Ö½ÚÂë¡£ÕâÒ»±àÒë¹ý ......

java ·¢ËÍÓʼþʵÀý

package com.sj.main;
public class Snippet {
public static void main(String[] args){
//Õâ¸öÀàÖ÷ÒªÊÇÉèÖÃÓʼþ
MailSenderInfo mailInfo = new MailSenderInfo();
String biaoti ="ÎÒÊÇËÕ½¨£¬ÕâÊÇÎҵIJâÊÔÓʼþ";
String neirong = "ÎÒÊÇËÕ½¨ÒÔÏÂÊÇÎҵIJâÊÔÓʼþ£¬»¶Ó­´ó¼Ò½ ......

ɵB×Ô¼º¿´µÄjava±Ê¼Ç£º½âÎöXML

 ½ñÍíÁÄÁËÒ»ÍíÌ죬±ß¿´java ±ßÁÄÌ죬ûÓм¯Öо«ÉñÈ¥¿´¡£Ã»¸ã¶®java¶ÁÈ¡xml µÄ»úÖÆ¡£¿´ÁËһЩÊéÏȰÑËû¼Ç¼һÏ¡£²ÉÓÃDOMÎĵµ¶ÔÏóÄ£ÐÍ£¬µÚÒ»ÖÖ·½·¨À´½âÎö¡£Ìý˵ÕâÖÖ½âÎö»áÓÐһЩȱµã£¬²»¹ý×ÜËãµ÷ÊÔͨÁË£¬ËãÊÇÒ»ÖÖ½ø²½¡£
<?xml version="1.0" encoding="utf-8"?>
<item>
  <node>aa</node&g ......

javaÁ´½Ósql server

Ô­Ìû¼°ÌÖÂÛ£ºhttp://bbs.bc-cn.net/dispbbs.asp?boardid=12&id=140292
*   ×î½üÒòΪ¿ª·¢»î¶¯ÐèÒª,ÓÃÉÏÁËEclipse,²¢ÒªÇóʹÓþ«¼ò°æµÄSQLÊý¾Ý¿â(¼´SQL   Server   2005)À´½øÐпª·¢ÏîÄ¿   *
1.×¼±¸¹¤×÷:   ×¼±¸Ïà¹ØµÄÈí¼þ(Eclipse³ýÍâ,¿ªÔ´Èí¼þ¿ÉÒÔ´Ó¹ÙÍøÏÂÔØ)
<1> .Microsoft   ......

Java synchronized

ÖÚËùÖÜÖª£¬ÔÚJava¶àÏ̱߳à³ÌÖУ¬Ò»¸ö·Ç³£ÖØÒªµÄ·½Ãæ¾ÍÊÇÏ̵߳Äͬ²½ÎÊÌâ¡£
¹ØÓÚÏ̵߳Äͬ²½£¬Ò»°ãÓÐÒÔϽâ¾ö·½·¨£º

1.
ÔÚÐèҪͬ²½µÄ·½·¨µÄ·½·¨Ç©ÃûÖмÓÈësynchronized¹Ø¼ü×Ö¡£

2.
ʹÓÃsynchronized¿é¶ÔÐèÒª½øÐÐͬ²½µÄ´úÂë¶Î½øÐÐͬ²½¡£

3. ʹÓÃJDK
5ÖÐÌṩµÄjava.util.concurrent.lock°üÖеÄLock¶ÔÏó¡£ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ