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

Java enum ö¾ÙÀàÐÍ

Java enum ö¾ÙÀàÐÍ
ö¾ÙÀàÐÍÊÇÒ»¸ö³£Á¿¼¯ºÏµÄÊý¾ÝÀàÐÍ¡£
ÒòΪ¶¼Êdz£Á¿£¬ËùÒÔÒ»¸öö¾ÙÀàÐÍÖеÄ×Ö¶ÎÃû¶¼Òª´óд¡£
ÔÚJAVAÖУ¬Ã¶¾ÙÀàÐ͵͍ÒåÊÇͨ¹ý“enum“¹Ø¼ü×Ö½øÐеġ£ÀýÈçÄãÒª¶¨Òå
Ò»¸ö±íʾһ¸öÐÇÆÚµÄÿһÌìµÄö¾ÙÀàÐÍ£º
public enum Day {
  SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY,
  SATURDAY
}
Ç¿ÁÒ½¨Òéµ±ÄãÐèÒª¶¨ÒåÒ»×é³£Á¿Ê±£¬Ê¹ÓÃö¾ÙÀàÐÍ¡£
ÏÂÃæÎÒÃÇÀ´¿´ÔõÑùʹÓÃÉÏÃæ¶¨ÒåµÄÀàÐÍDay£º
public class EnumTest {
  Day day;
 
  public EnumTest(Day day){
    this.day = day;
  }
 
  public void tellItLikeItIs(){
    switch(day){
      case MONDAY: System.out.println("Mondays are bad."); break;
      case FRIDAY: System.out.println("Fridays are better"); break;
      case SATURDAY:
      case SUNDAY: System.out.println("Weekends are best"); break;
      default: System.out.println("Midweek days are so-so.")
    }
  }
 
  public static void main(String[] args){
    EnumTest firstDay = new EnumTest(Day.MONDAY);
    firstDay.tellItLikeItIs();
    EnumTest thirdDay = new EnumTest(Day.WEDNESDAY);
        thirdDay.tellItLikeItIs();
        EnumTest fifthDay = new EnumTest(Day.FRIDAY);
        fifthDay.tellItLikeItIs();
        EnumTest sixthDay = new EnumTest(Day.SATURDAY);
        sixthDay.tellItLikeItIs();
        EnumTest seventhDay = new EnumTest(Day.SUNDAY);
        seventhDay.tellItLikeItIs();
  }
}
Êä³ö£º
Mondays are bad.
Midweek days are so-so.
Fridays are better.
Weekends are best.
Weekends are best.
JAVAÖе


Ïà¹ØÎĵµ£º

java¶ÁÈ¡mp3Îļþ

java¶ÁÈ¡mp3Îļþ ÊÕ²Ø
JMFʵ¼ÊÉÏÊÇJavaµÄÒ»¸öÀà°ü¡£JMF 2.1.1¼¼ÊõÌṩÁËÏȽøµÄýÌå´¦ÀíÄÜÁ¦£¬´Ó¶øÀ©Õ¹ÁËJavaƽ̨µÄ¹¦ÄÜ¡£ÕâЩ¹¦ÄܰüÀ¨£ºÃ½Ìå²¶»ñ¡¢Ñ¹Ëõ¡¢Á÷ת¡¢»Ø·Å£¬ÒÔ¼°¶Ô¸÷ÖÖÖ÷ҪýÌåÐÎʽºÍ±àÂëµÄÖ§³Ö£¬ÈçM-JPEG¡¢H.263¡¢MP3¡¢RTP/RTSP (ʵʱ´«ËÍЭÒéºÍʵʱÁ÷תЭÒé)¡¢Macromedias Flash¡¢IBMµÄHotMediaºÍBeatniksµÄRi ......

Java²Ù×÷MS WordºÍExcelÎĵµ

ÄÜͨ¹ýJavaÀ´²Ù×÷Word»òÕßExcelµÄapi£¬¾ÝÎÒËùÖªµÄÓÐÕâЩ£¬¶¼¿¼²ìÁËһϣ¬¿ªÔ´µÄ³ýÁËOpenofficeºÍofficewriter¶ÔWordµÄ±í¸ñÓкõÄÖ§³ÖÍ⣬ÆäËû¶¼ºÜ²»×¨Òµ£¬»òÕß²»Ö§³Ö¡£
jacob http://sourceforge.net/projects/jacob-project/
JACOB is a JAVA-COM Bridge that allows you to call COM Automation components from Java. ......

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 ......

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¡£ ......

JAVA¿ò¼Ü


Struts¡¢HibernateºÍSpringµÄÇáÐÍJ2EE¼Ü¹¹µÄÑо¿ 
 
  
¹Ø¼ü´Ê Struts£¬Hibernate£¬Spring£¬Óû§¹ÜÀí
Ò»¡¢ÌØÐÔ
1. StrutsÓëMVC
StrutsÊÇApache JakartaÏîÄ¿µÄ×é³É²¿·Ö¡£¸ÃÏîÄ¿µÄÄ¿±êÊÇΪ½¨Á¢Java Web Ó¦ÓóÌÐò¶øÌṩµÄÒ»¸ö¿ªÔ´
¿ò¼Ü¡£Í¨¹ýʹÓÃStruts¿ò¼Ü¿ÉÒԸĽøºÍÌá¸ßJava Server Pages (JSP ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ