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

javaÖеÄstaticÏê½â

Èç¹ûÒ»¸öÀà³ÉÔ±±»ÉùÃ÷Ϊstatic£¬Ëü¾ÍÄܹ»ÔÚÀàµÄÈκζÔÏó´´½¨Ö®Ç°±»·ÃÎÊ£¬¶ø²»±ØÒýÓÃÈκζÔÏó¡£static ³ÉÔ±µÄ×î³£¼ûµÄÀý×ÓÊÇmain( ) ¡£ÒòΪÔÚ³ÌÐò¿ªÊ¼Ö´ÐÐʱ±ØÐëµ÷ÓÃmain() £¬ËùÒÔËü±»ÉùÃ÷Ϊstatic¡£
ÉùÃ÷ΪstaticµÄ±äÁ¿ÊµÖÊÉϾÍÊÇÈ«¾Ö±äÁ¿¡£µ±ÉùÃ÷Ò»¸ö¶ÔÏóʱ£¬²¢²»²úÉústatic±äÁ¿µÄ¿½±´£¬¶øÊǸÃÀàËùÓеÄʵÀý±äÁ¿¹²ÓÃͬһ¸östatic±äÁ¿£¬ÀýÈ磺ÉùÃ÷Ò»¸östaticµÄ±äÁ¿count×÷ΪnewÒ»¸öÀàʵÀýµÄ¼ÆÊý¡£ÉùÃ÷ΪstaticµÄ·½·¨ÓÐÒÔϼ¸ÌõÏÞÖÆ£º 
1¡¢ËüÃǽöÄܵ÷ÓÃÆäËûµÄstatic ·½·¨¡£
2¡¢ËüÃÇÖ»ÄÜ·ÃÎÊstaticÊý¾Ý¡£
3¡¢ËüÃDz»ÄÜÒÔÈκη½Ê½ÒýÓÃthis »òsuper¡£
Èç¹ûÄãÐèҪͨ¹ý¼ÆËãÀ´³õʼ»¯ÄãµÄstatic±äÁ¿£¬Äã¿ÉÒÔÉùÃ÷Ò»¸östatic¿é£¬Static ¿é½öÔÚ¸ÃÀà±»¼ÓÔØÊ±Ö´ÐÐÒ»´Î¡£ÏÂÃæµÄÀý×ÓÏÔʾµÄÀàÓÐÒ»¸östatic·½·¨£¬Ò»Ð©static±äÁ¿£¬ÒÔ¼°Ò»¸östatic ³õʼ»¯¿é£º
public class UserStatic {  
        static int a = 3;  
        static int b;    
        static void meth(int x) {  
            System.out.println("x = " + x);  
            System.out.println("a = " + a);  
            System.out.println("b = " + b);    
        }   
        static {  
            System.out.println("Static block initialized.");  
            b = a * 4;    
        }   
        public static void main(String args[]) {  
            meth(42);   
        } &


Ïà¹ØÎĵµ£º

javaÈëÃÅ

 Javaѧϰ´ÓÈëÃŵ½¾«Í¨ 
Ò»¡¢ JDK (Java Development Kit) 
JDKÊÇÕû¸öJavaµÄºËÐÄ£¬°üÀ¨ÁËJavaÔËÐл·¾³£¨Java Runtime Envirnment£©£¬Ò»¶ÑJava¹¤¾ßºÍJava»ù´¡µÄÀà¿â(rt.jar)¡£²»ÂÛʲôJavaÓ¦Ó÷þÎñÆ÷ʵÖʶ¼ÊÇÄÚÖÃÁËij¸ö°æ±¾µÄJDK¡£Òò´ËÕÆÎÕJDKÊÇѧºÃJavaµÄµÚÒ»²½¡£×îÖ÷Á÷µÄJ ......

javaÐĵã¡

 javaÐĵã¡--ºÜºÃµÄjavaѧϰÀú³Ì£¨×ª×ÔÕŹú±¦£© ÊÕ²Ø ´ËÎÄÓÚ2009-10-26±»ÍƼöµ½CSDNÊ×Ò³
ÈçºÎ±»ÍƼö£¿
1.    Êý×éÓÐûÓÐlength()Õâ¸ö·½·¨? StringÓÐûÓÐlength()Õâ¸ö·½·¨£¿
        ´ð£ºÊý×éûÓÐlength()Õâ¸ö·½·¨£¬ÓÐlengthµÄÊôÐÔ¡£
     ......

javaËæ»úÊýµÄ²úÉú

1. import java.util.*; 
2.(A) public class Test
       { public static void main(String[] args)
         { 
         //Éú³É [0-n) ¸ö²»Öظ´µÄËæ»úÊý  st ÓÃÀ´±£´æ ......

Java Reflection

 
·´ÉäÊÇJavaÓïÑÔÖкÜÖØÒªµÄÒ»¸ö×é³É²¿·Ö£¬ËùÒԾʹ˻°ÌâÌÖÂÛµÄ×ÊÔ´¿ÉνÊýÖ®²»¾¡£¬ÈÕ³£¿ª·¢Ò²»á¾­³£Ê¹Óõ½¹ØÓÚ·´ÉäµÄReflection
API¡£Java5.0
Tiger³öÏÖÒԺ󣬸ü¶Ô·´ÉäAPIÓÐÁËеÄÀ©Õ¹£¬¾¡¹ÜÌÖÂ۵ϰÌâºÜ¶à£¬²»¹ýÎÒ»¹ÊǾõµÃ²»¹»È«Ã棬ÓÈÆäÊǶԷºÐÍÕâÒ»¿é£¬ËùÒÔ¾ÍÎÒËùÖª£¬ÔÙ»¨Á¦Æø×ܽáÒ»·¬
Ê×ÏÈ·´ÉäµÄÈë¿ÚÊÇ´ÓClass¿ ......

Java Web ¹¤×÷Ô­Àí£¨×ª£©

 Http´¦Àí²½Öè:
1.¿Í»§¶ËºÍWeb·þÎñÆ÷½¨Á¢Á¬½Ó;
2.¿Í»§¶Ë·¢ËÍhttpÇëÇó;
3.·þÎñÆ÷¶Ë½ÓÊÕ¿Í»§¶ËµÄhttpÇëÇó,Éú³ÉhttpÏìÓ¦»Ø·¢;
4.·þÎñÆ÷¹Ø±ÕÁ¬½Ó.
ÇëÇó:ÇëÇóÐÐ,ÇëÇóÍ·,¿ÕÐÐ,ÏûÏ¢Ìå.
ÏìÓ¦:״̬ÐÐ,ÏìӦͷ,¿ÕÐÐ,ÏûÏ¢Ìå.
Servlet:
ÌØµã:1.ÆÕͨµÄJava´úÂë,ʹÓÃÁËеÄAPI;
2.²»ÊôÓÚJ2SE,¾ßÓе¥¶ÀµÄ¹æ·¶;
3.¼Ì³ÐÓÚHttpS ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ