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

Effective Java: Item 1

Static Factory Methods
Four Advantages:
1) have names
2) not required to create a new object each time they are invoked
3) return an object of any subtype of their return type
4) reduce the verbosity of creating parameterized type instances.(for example: newInstance() method)


Ïà¹ØÎĵµ£º

sql 2005 ´æ´¢¹ý³Ì·ÖÒ³ java ´úÂë

 create PROCEDURE pagelist
@tablename nvarchar(50),
@fieldname nvarchar(50)='*',         
@pagesize int output,--ÿҳÏÔʾ¼Ç¼ÌõÊý
@currentpage int output,--µÚ¼¸Ò³
@orderid nvarchar(50),--Ö÷¼üÅÅÐò
@sort int,--ÅÅÐò·½Ê½£¬1±íʾÉýÐò£¬0±íʾ½µÐòÅÅÁÐ ......

ÿ¸öJava³õѧÕß¶¼Ó¦¸Ã¸ã¶®µÄÁù¸öÎÊÌâ

¶ÔÓÚÕâ¸öϵÁÐÀïµÄÎÊÌ⣬ÿ¸öѧJavaµÄÈ˶¼Ó¦¸Ã¸ã¶®¡£µ±È»£¬Èç¹ûÖ»ÊÇѧJavaÍæÍæ¾ÍÎÞËùνÁË¡£Èç¹ûÄãÈÏΪ×Ô¼ºÒѾ­³¬Ô½³õѧÕßÁË£¬È´²»ºÜ¶®ÕâЩÎÊÌ⣬Ç뽫Äã×Ô¼ºÖعé³õѧÕßÐÐÁС£ÄÚÈݾùÀ´×ÔÓÚCSDNµÄ¾­µäÀÏÌù¡£
¡¡¡¡ÎÊÌâÒ»£ºÎÒÉùÃ÷ÁËʲô£¡
String s = "Hello world!";
¡¡¡¡Ðí¶àÈ˶¼×ö¹ýÕâÑùµÄÊÂÇ飬µ«ÊÇ£¬ÎÒÃǵ½µ×ÉùÃ÷ÁËʲô£¿ ......

JAVAÏîÄ¿´úÂë±àд¹æ·¶


 
´úÂë±àд¹æ·¶Ä¿µÄ£ºÄܹ»ÔÚ±àÂë¹ý³ÌÖÐʵÏֹ淶»¯£¬ÎªÒÔºóµÄ³ÌÐò¿ª·¢ÖÐÑø³ÉÁ¼ºÃµÄÐÐΪϰ¹ß¡£
´úÂë±àд¹æ·¶Ê¹Ó÷¶Î§£ºJ2EEÏîÄ¿¿ª·¢¡£
°üÃüÃû¹æ·¶£º
Ä¿µÄ£º°üµÄÃüÃû¹æ·¶Ó¦µ±ÌåÏÖ³öÏîÄ¿×ÊÔ´Á¼ºÃµÄ»®·Ö
servletÀàËùÔÚ°üÃüÃû¹æ·¶£º¹«Ë¾Ãû³Æ.¿ª·¢×éÃû³Æ.ÏîÄ¿Ãû³Æ.web.servlet
ÀýÈ磺net.linkcn.web.servlet
×Ô¶¨Òå± ......

javaλÔËËãÀý×Ó

/*
Ò»¹²3¸öÒÆÎ»ÔËËã·û£¬×óÒÆÎ»<<£¬ÓÒÒÆÎ»>>ºÍÎÞ·ûºÅÒÆÎ»>>>¡£×óÒÆÎ»<<ÔÚµÍλ´¦²¹0¡£ÓÒÒÆÎ»>>ÈôֵΪÕýÔòÔÚ¸ßλ²åÈë0£¬ÈôֵΪ¸ºÔòÔÚ¸ßλ²åÈë1¡£ÎÞ·ûºÅÓÒÒÆÎ»>>>ÎÞÂÛÕý¸º¶¼ÔÚ¸ßλ´¦²åÈë0¡£
·ÇÔËËã·û~
&¶ÔÁ½¸öÕûÐͲÙ×÷ÊýÖжÔӦλִÐв¼¶û´úÊý£¬Á½¸öλ¶¼Îª1ʱÊä³ö1£¬·ñÔò0¡£
......

ÕÅТÏé¡¶Java¾ÍÒµÅàѵ½Ì³Ì¡·Ô´´úÂë 02 ²¿·Ö

¡¶Java¾ÍÒµÅàѵ½Ì³Ì¡· ×÷ÕߣºÕÅТÏé ÊéÖÐÔ´Âë
¡¶Java¾ÍÒµÅàѵ½Ì³Ì¡·P34Ô´Âë
³ÌÐòÇåµ¥£ºPromote.java
class Promote
{
 public static void main(String args[])
 {
  byte b = 50;
  char c = 'a';
  short s = 1024;
  int i = 50000;
  float ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ