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

Java±ÊÊÔÌ⡾ת¡¿

1.д³ö³ÌÐòÔËÐнá¹û
  
public
class
TestString {
    public
static
void
link(String a){
         a+="World"
;
    }
    public
static
void
main(String []args){
         String a = "Hello"
;
         link(a);
         System.out.println(a);
    }
}
´ð: ÕâµÀÌ⿼Á½¸ö·½Ãæ:
1).¡¡String¶ÔÏóµÄÄÚÈÝÊDz»ÄܸıäµÄ,a+="World"²¢²»ÊǰÑaËùÖ¸¶ÔÏó¸Ä±ä,
¡¡¡¡¶øÊÇÏÈÉú³ÉÒ»¸öÁÙʱString¶ÔÏó,ÆäֵΪa+"World",È»ºóÔÚ°ÑÕâ¸öÁÙʱ
¡¡¡¡¶ÔÏ󸳸øa.
2).¡¡JavaÖк¯Êý²ÎÊý´«µÝ·½Ê½ÎªCall by value,link·½·¨ÖлáÉú²úaµÄÒ»¸ö
¡¡¡¡¿½±´,ͬÑùÖ¸ÏòaËùÖ¸µÄ¶ÔÏó,×ÛºÏÒÔÉÏÁ½µã,µÃ³ö½á¹ûΪ Hello
 
2. д³öÏÂÃæ´úÂëµÄ½á¹û
 
System.out.println(
"
ja
"
+
"
va
"
 
==
 
"
java
"
);
 
´ð:"=="ÓÃÀ´±È½Ï¶ÔÏóµÄÒýÓÃ,¶øequals()ÓÃÀ´±È½Ï¶ÔÏóµÄÄÚÈÝ,µ«ÊÇÈç¹ûÊÇ×Ö·û´®³£Á¿,ÓÃ"=="Ò²¿ÉÒԱȽÏÄÚÈÝ
ÊÇ·ñÏàµÈ,"ja"+"va"ºÍ"java"¶¼ÊÇ×Ö·û´®³£Á¿,Òò´Ë½á¹ûΪtrue
ͬÀí,ÏÂÃæ´úÂë½á¹ûÒ²ÊÇtrue
 
final
 String str 
=
 
"
java
"
;
System.out.println(str
==
"
java
"
)
 
3.¼Ì³ÐʱºòÀàµÄÖ´ÐÐ˳ÐòÎÊÌâ,Ò»°ã¶¼ÊÇÑ¡ÔñÌâ,ÎÊÄ㽫»á´òÓ¡³öʲô?
public
class
Parent {
    //1
    static
int
a = 1;
    //2
    static
  
    {
       a=10;
       System.out.println("parent static
code"
);
    }
    //4
    public
Parent(){
      System.out.println("Parent constructor


Ïà¹ØÎĵµ£º

°Ë Ò»¸öJAVA°¸Àý

   ¼ÙÉèÐèÇó(ÈçÓÐÀ×ͬ£¬´¿ÊôÇɺÏ)£º
     ÓÐÒ»¸öÈ«¹úÐԵĴóÆóÒµ£¬ÔÚÈ«¹ú¸÷µØÐèÒª²¿ÊðÉÏǧ̨¿Í»§»ú£¬ÕâЩ¿Í»§»úÐèҪʵʱÓë·þÎñÆ÷½»»¥£¬½øÐÐÊý¾Ý´¦Àí¡£ÊµÊ±ÐÔÒªÇó¸ß£¬°²È«ÐԸߣ¬ÒªÇóÖ§³ÖÊÂÎñ£¬ÒÔ¼°²»ÖжϷþÎñ¡£
   
Ó²¼þ²¿Êð£º
  1¡¢ 3000̨¿Í»§»ú
  2¡¢ 10̨· ......

JAVA³ÌÐòÔ±µÄǮ;

      Ç廪´óѧ³ö°æÉç¡¶Java³ÌÐòÔ±£¬ÉϰàÄǵãʶù¡·×÷ÕߣºÖÓÉù Õ½ڣº1.1С½Ú
      ÎÒÃǸոսøÈë±¾ÊéµÄÕýÌâ¾ÍÄóöÒ»¸öËײ»¿ÉÄ͓Ǯ”×ÖÀ´ºÍ´ó¼Ò´óÌ¸ÌØÌ¸£¬Î´Ãâ²»ÑÅ¡£µ«ÊÇ£¬ÎÒ»¹ÊÇÒªÔÚÒ»¿ªÊ¼¾ÍҪ˵Õâ¸öÎÊÌ⣬ÒòΪÕâÊǺܶàÅóÓѹØÐĵÄÎÊÌ⣬Ϊʲô²»ÏÈ˵ ......

java Êý×ÖÖ¤ÊékeytoolÓ÷¨

Java ÖÐµÄ keytool.exe £¨Î»ÓÚ JDK\Bin Ŀ¼Ï£©¿ÉÒÔÓÃÀ´´´½¨Êý×ÖÖ¤Ê飬ËùÓеÄÊý×ÖÖ¤ÊéÊÇÒÔÒ»ÌõÒ»Ìõ(²ÉÓñðÃûÇø±ð)µÄÐÎʽ´æÈëÖ¤Êé¿âµÄÖУ¬Ö¤Êé¿âÖеÄÒ»ÌõÖ¤Êé°üº¬¸ÃÌõÖ¤ÊéµÄ˽Կ£¬¹«Ô¿ºÍ¶ÔÓ¦µÄÊý×ÖÖ¤ÊéµÄÐÅÏ¢¡£Ö¤Êé¿âÖеÄÒ»ÌõÖ¤Êé¿ÉÒÔµ¼³öÊý×ÖÖ¤ÊéÎļþ£¬Êý×ÖÖ¤ÊéÎļþÖ»°üÀ¨Ö÷ÌåÐÅÏ¢ºÍ¶ÔÓ¦µÄ¹«Ô¿¡£
KeytoolÊÇÒ»¸öJavaÊý¾ÝÖ ......

javaÃæÊÔÖÐҪעÒâµÄµØ·½


1.JavaÀïÃæÊ¹ÓÃ
static
·½·¨ÓÐʲôºÃ´¦£¿
´ð£ºÔÚÏîÄ¿ÖУ¬¶ÔÓÚÆµ·±Ê¹Óõķ½·¨£¬Ê¹ÓÃstatic
ÐÞÊλáÌá¸ßЧÂÊÂ𣿠
¾²Ì¬·½·¨µÄºÃ´¦¾ÍÊDz»ÓÃÉú³ÉÀàµÄʵÀý¾ÍÄÜÖ±½Óµ÷ÓúͶÔÏóÎÞ¹Ø
Äã²»ÓÃÉú³É¶ÔÏó¾ÍÄÜÓÃÕâ¸ö·½·¨ÁË£¬²»ÊÇÌá¸ßЧÂÊ£¿ÄãÉú³É¶ÔÏóµÃÕ¼ÓÃÄÚ´æ¿Õ¼ä°¡ 
ÖÁÓÚ¾²Ì¬ÊôÐÔÒ²ÄÜÌá¸ßЧÂÊ£¬ÄãÆÕͨµÄÊôÐÔÿ¸öÀà¶Ô ......

JAVAºÍFlexÃô½Ýµ÷ÓÃ(¶þ)

    FlexÔÚºÍjavaµ÷Óùý³ÌÖУ¬ÆäʵÓиü¼ÓÁé»îµÄ°ì·¨À´Ìá¸ßϵͳµÄÃô½Ý¶È£¬¼«´óÌá¸ßϵͳµÄñîºÏºÍ¿ª·¢Ð§ÂÊ¡£ÔÚÕâÀïÎÒ¼ÌÐø¸ø´ó¼Ò½éÉÜһϣ¬Ãô½Ýµ÷ÓÃÖеÄjava¶¯Ì¬´úÂëµ÷Óá£
    ÏÈ¿´javaµÄÀà(BeanShell)ÕâÀïÖ÷ÒªÊǽÓÊÕjava´úÂëÀ´¶¯Ì¬µ÷ÓõÄ
    package com.shine.framework.be ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ