Ò׽ؽØͼÈí¼þ¡¢µ¥Îļþ¡¢Ãâ°²×°¡¢´¿ÂÌÉ«¡¢½ö160KB

JavaÖг£ÓÃÉè¼Æģʽ×ܽá


ÔÚJavaÖÐÓÐ23ÖÐÉè¼Æģʽ£¬ÏÂÃæÖ»¶Ô²¿·Ö³£ÓõÄÉè¼Æģʽ½éÉÜһϣº
1.µ¥Àýģʽ£¨ÓеÄÊéÉÏ˵½Ðµ¥Ì¬Ä£Ê½Æäʵ¶¼Ò»Ñù£©
¸ÃģʽÖ÷ҪĿµÄÊÇʹÄÚ´æÖб£³Ö1¸ö¶ÔÏ󡣿´ÏÂÃæµÄÀý×Ó£º
package org.sp.singleton;
//·½·¨Ò»
public class Singleton {
//½«×ÔÉíµÄʵÀý¶ÔÏóÉèÖÃΪһ¸öÊôÐÔ,²¢¼ÓÉÏStaticºÍfinalÐÞÊηû
private static final Singleton instance = new Singleton();
//½«¹¹Ôì·½·¨ÉèÖóÉ˽ÓÐÐÎʽ
private Singleton() {
}
//ͨ¹ýÒ»¸ö¾²Ì¬·½·¨ÏòÍâ½çÌṩÕâ¸öÀàµÄʵÀý
public static Singleton getInstance() {
   return instance;
}
}
//·½·¨¶þ
class Singleton2 {
private static Singleton2 instance2 = null;
public static synchronized Singleton2 getInstance() {
   if (instance2 == null)
    instance2 = new Singleton2();
   return instance2;
}
}
×¢£ºÕâ¶þ¸ö·½·¨ÊµÏÖÁËÒ»ÑùµÄ¹¦ÄÜ£¬µ«¸öÈËÍƼö²ÉÓõÚÒ»ÖÖ·½·¨¡£
2.¹¤³§Ä£Ê½
¸ÃģʽÖ÷Òª¹¦ÄÜÊÇͳһÌṩʵÀý¶ÔÏóµÄÒýÓ᣿´ÏÂÃæµÄÀý×Ó£º
public class Factory{
public ClassesDao getClassesDao(){
   ClassesDao cd = new ClassesDaoImpl();
   return cd;
}
}
interface ClassesDao{
public String getClassesName();
}
class ClassesDaoImpl implements ClassesDao {
public String getClassesName(){
   System.out.println("A°à");
}
}
class test
{
public static void main(String[] args){
   Factory f = new Factory();
   f.getClassesDao().getClassesName();
}
}
Õâ¸öÊÇ×î¼òµ¥µÄÀý×ÓÁË£¬¾ÍÊÇͨ¹ý¹¤³§·½·¨Í¨¹ý½Ó¿Ú»ñÈ¡¶ÔÏóµÄÒýÓÃ
3.½¨Ôìģʽ
¸ÃģʽÆäʵ¾ÍÊÇ˵£¬Ò»¸ö¶ÔÏóµÄ×é³É¿ÉÄÜÓкܶàÆäËûµÄ¶ÔÏóÒ»Æð×é³ÉµÄ£¬±ÈÈç˵£¬Ò»¸ö¶ÔÏóµÄʵÏַdz£¸´ÔÓ£¬ÓкܶàµÄÊôÐÔ£¬¶øÕâЩÊôÐÔÓÖÊÇÆäËû¶ÔÏóµÄÒýÓ㬿ÉÄÜÕâЩ¶ÔÏóµÄÒýÓÃÓÖ°üÀ¨ºÜ¶àµÄ¶ÔÏóÒýÓ᣷â×°ÕâЩ¸´ÔÓÐÔ£¬¾Í¿ÉÒÔʹÓý¨Ôìģʽ¡£
¾ßÌå¿´¿´ÏÂÃæµÄÀý×Ó£º
4.ÃÅÃæģʽ
Õâ¸öģʽ¸öÈ˸оõÏñÊÇService²ãµÄÒ»¸ö·­°æ¡£±ÈÈçDaoÎÒÃǶ¨ÒåÁ˺ܶà³Ö¾Ã»¯·½·¨£¬ÎÒÃÇͨ¹ýService²ã½«DaoµÄÔ­×Ó·½·¨×é³ÉÒµÎñÂß¼­£¬ÔÙͨ¹ý·½·¨ÏòÉϲãÌṩ·þÎñ¡£ÃÅÃæģʽµÀÀíÆäʵÊÇÒ»ÑùµÄ¡£
¾ßÌå¿´¿´Õâ¸öÀý×Ó£º
interface ClassesDao{
public String getClassesName();
}
class ClassesDaoImpl implements Classe


Ïà¹ØÎĵµ£º

°¢Àï°Í°ÍÍøÕ¾¼¼Êõ²¿ÕÐƸJava¿ª·¢¹¤³Ìʦ

¹«Ë¾ÒµÎñ¼±ËÙÀ©ÕÅ£¬¼±ÐèÓвÅÄܵÄͬѧ¼ÓÈëµ½ÎÒÃǵÄÐÐÁÐÖУ¬
×îºÃÄã¶Ô¹¤×÷»ý¼«£¬ÈÏÕ棬¸ºÔð
×îºÃÄãÒѾ­ÓÐÔúʵµÄ±à³Ì»ù´¡
×îºÃÄãÒѾ­ÊìÁ·ÕÆÎÕJava¼¼Êõ
×îºÃÄãÖÁÉÙÒÑÓÐÒ»£¬Á½Ä깤×÷¾­Ñé
  
¹¤×÷µØµã£ºº¼ÖÝ
ְλ      £ºJava¿ª·¢¹¤³Ìʦ£¨°¢Àï°Í°Í¼¯ÍÅB2B¹«Ë¾ÍøÕ¾¼¼Êõ²¿£©
ÓÐÒâÕßÇë°Ñ ......

¹ØÓÚJavaÄÚ´æй©

1 ÒýÑÔ
     JavaµÄÒ»¸öÖØÒªÓŵã¾ÍÊÇͨ¹ýÀ¬»øÊÕ¼¯Æ÷GC £¨Garbage Collection£©×Ô¶¯¹ÜÀíÄÚ´æµÄ»ØÊÕ£¬³ÌÐòÔ±²»ÐèҪͨ¹ýµ÷Óú¯ÊýÀ´ÊÍ·ÅÄÚ´æ¡£Òò´Ë£¬ºÜ¶à³ÌÐòÔ±ÈÏΪJava ²»´æÔÚÄÚ´æй©ÎÊÌ⣬»òÕßÈÏΪ¼´Ê¹ÓÐÄÚ´æй©Ҳ²»ÊdzÌÐòµÄÔðÈΣ¬¶øÊÇGC »òJVMµÄÎÊÌâ¡£Æäʵ£¬ÕâÖÖÏë·¨ÊDz»ÕýÈ·µÄ£¬ÒòΪJava Ò²´æÔÚÄÚ´æ ......

java¡¢C#ÖÐSqlÓï¾ä´«²ÎµÄд·¨¼°ÒâÒå

 SqlserverÕⶫÎ÷ûÉÙ¸úËû´ò½»µÀ,¸Õѧ¿ª·¢ÓïÑÔʱ¾ÍÒѾ­¸úËû½Ó´¥ÁË,²»ÒªËµºÜ¾«Í¨,µ«¾ÍÓï·¨»¹ËãÊÇÊìϤ,µ«ÏÖÔÚ¿ªÊ¼Ð´C#,·¢ÏÖºÜC#¶àÁËÒ»ÖÖSqlServerµÄ²ÎÊý´«È뷽ʽ,ÒÔÍùÎÒÃdz£³£¶ÔÒª´«²ÎµÄSqlÓï¾ä¶¼ÊÇÖ±½Óͨ¹ýÆ´´ÕSqlÓï¾äµÄ·½Ê½À´ÊµÏÖ,µ«ÏÖÔÚC#ΪʲôҪרÃÅ×öÒ»¸öSql²ÎÊýµÄÀàÀ´ÊµÏÖÄØ,¾­¹ý²éÕÒ²ÅÖªµÀ,ÕâÑù×öÊÇÓеÀÀíµÄ,Ò»Ê ......

javaÖÐsynchronizedÓ÷¨(zz)

javaÖÐsynchronizedÓ÷¨(zz)
 
´ò¸ö±È·½£ºÒ»¸öobject¾ÍÏñÒ»¸ö´ó·¿×Ó£¬´óÃÅÓÀÔ¶´ò¿ª¡£·¿×ÓÀïÓÐ ºÜ¶à·¿¼ä£¨Ò²¾ÍÊÇ·½·¨£©¡£ÕâЩ·¿¼äÓÐÉÏËøµÄ£¨synchronized·½·¨£©£¬ ºÍ²»ÉÏËøÖ®·Ö£¨ÆÕͨ·½·¨£©¡£·¿ÃÅ¿Ú·Å×ÅÒ»°ÑÔ¿³×£¨key£©£¬Õâ°ÑÔ¿³×¿ÉÒÔ´ò¿ªËùÓÐÉÏËøµÄ·¿¼ä¡£ÁíÍâÎÒ°ÑËùÓÐÏëµ÷ÓøöÔÏó·½·¨µÄÏ̱߳ÈÓ÷³ÉÏë½øÈëÕâ·¿×Óij¸ö ......

javaÊý¾Ý¿âÉè¼ÆÖеÄ14¸ö¼¼ÇÉ

 ÏÂÊöÊ®Ëĸö¼¼ÇÉ£¬ÊÇÐí¶àÈËÔÚ´óÁ¿µÄÊý¾Ý¿â·ÖÎöÓëÉè¼Æʵ¼ùÖУ¬Öð²½×ܽá³öÀ´µÄ¡£¶ÔÓÚÕâЩ¾­ÑéµÄÔËÓ㬶ÁÕß²»ÄÜÉú°ïÓ²Ì×£¬ËÀ¼ÇÓ²±³£¬¶øÒªÏû»¯Àí½â£¬ÊµÊÂÇóÊÇ£¬Áé»îÕÆÎÕ¡£²¢Öð²½×öµ½£ºÔÚÓ¦ÓÃÖз¢Õ¹£¬ÔÚ·¢Õ¹ÖÐÓ¦Óá£
      1. ԭʼµ¥¾ÝÓëʵÌåÖ®¼äµÄ¹Øϵ
¡¡¡¡
      ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØͼ | ¸ÓICP±¸09004571ºÅ