JAVAÖµ´«µÝ(call by value)
public class Foo {
static void operate(StringBuffer x,StringBuffer y){
x.append(y);
y=x;
}
public static void main(String args[]){
StringBuffer a = new StringBuffer("A");
StringBuffer b = new StringBuffer("B");
operate(a,b);
System.out.println(a+","+b);
}
}
Êä³öAB , B
JAVA·½·¨µ÷ÓÃÊÇͨ¹ý“´«Öµ”£¬¶ÔÓÚÔÐÍÀ´Ëµ£¬ÊǰÑÖµcopy¹ýÈ¥£¬Óëµ÷ÓÃÕ߾Ͳ»Ïà¸ÉÁË¡£µ«ÊǶÔÓÚÒýÓÃÀ´Ëµ£¬Ö»ÊÇÒâζ×ŰÑÄÚ´æµØÖ·´«¹ýÈ¥£¬ÀïÃæ´æ·ÅµÄ“ÄÚÈÝ”¸úµ÷ÓÃÕßÊÇͬһ¸ö£¡Ò²¼´ËµÐÞ¸ÄÄÚÈÝ»áÓ°Ïìµ÷ÓÃÕß
x.append(y);//»áʹa±ä³ÉAB,
µ«ÊÇ
y = x ;//Ö»ÊÇʹ“Õâ¸ö”·½·¨ÄÚµÄÁÙʱ±äÁ¿yÖ¸Ïòx,¶ø²»»áÓ°Ïì´Ë·½·¨ÍâµÄµ÷ÓÃÕßµÄÒýÓã¬
ËùÒÔb»¹ÊǺ¬B
Ïà¹ØÎĵµ£º
1, ±£Ö¤Ḭ̈߳²È«µÄÈýÖÖ·½·¨ :
a, ²»Òª¿çÏ̷߳ÃÎʹ²Ïí±äÁ¿
b, ʹ¹²Ïí±äÁ¿ÊÇ finalÀàÐ͵Ä
c, ½«¹²Ïí±äÁ¿µÄ²Ù×÷¼ÓÉÏͬ²½
2, Ò»¿ªÊ¼¾Í½«ÀàÉè¼Æ³ÉḬ̈߳²È«µÄ , ±ÈÔÚºóÆÚÖØÐÂÐÞ¸´Ëü ,¸üÈÝÒ× .
3, ±àд¶àÏ̳߳ÌÐò , Ê×Ïȱ£Ö¤ËüÊÇÕýÈ·µÄ , Æä´ÎÔÙ¿¼ÂÇÐÔÄÜ .
4, ÎÞ״̬»òÖ»¶Á¶ÔÏóÓÀÔ¶ÊÇḬ̈߳²È«µÄ .
5, ²»Òª½«Ò»¸ö¹²Ïí±äÁ¿Âã ......
/Download by HTTP
//For other protocol, do it yourself
import java.net.*;
import java.io.*;
public class DonwLoa ......
JavaScriptÊÇÒ»ÖÖͨÓõġ¢»ùÓÚÔÐ͵ġ¢ÃæÏò¶ÔÏóµÄ½Å±¾ÓïÑÔ£¬¶ø½Å±¾ÓïÑÔ¾ÍÊÇÖ¸¿ÉÒÔºÍHtmlÓïÑÔ»ìºÏʹÓõÄÓïÑÔ
1.JavaScriptÓëJavaµÄÇø±ð
A. JavaScriptÊǽâÊÍÐ͵ÄÓïÑÔ£¬µ±³ÌÐòÖ´ÐеÄʱºò£¬ä¯ÀÀÆ÷Ò»±ß½âÊÍÒ»±ßÖ´ÐС£¶øJavaÊDZàÒëÐ͵ÄÓïÑÔ£¬±ØÐë¾¹ý±àÒë²ÅÄÜÖ´ÐÐ
B. ´úÂë ......
Ï̵߳Ĵ´½¨ºÍÆô¶¯
JavaÓïÑÔÒѾÄÚÖÃÁ˶àÏß³ÌÖ§³Ö£¬ËùÓÐʵÏÖRunnable½Ó¿ÚµÄÀà¶¼¿É±»Æô¶¯Ò»¸öÐÂỊ̈߳¬ÐÂÏ̻߳áÖ´ÐиÃʵÀýµÄrun()·½·¨£¬µ±run()·½·¨Ö´ÐÐÍê±Ïºó£¬Ï߳̾ͽáÊøÁË¡£Ò»µ©Ò»¸öÏß³ÌÖ´ÐÐÍê±Ï£¬Õâ¸öʵÀý¾Í²»ÄÜÔÙÖØÐÂÆô¶¯£¬Ö»ÄÜÖØÐÂÉú³ÉÒ»¸öÐÂʵÀý£¬ÔÙÆô¶¯Ò»¸öÐÂÏ̡߳£
ThreadÀàÊÇʵÏÖÁËRunnable½Ó¿ÚµÄÒ»¸öʵÀý£¬Ëü´ú±í ......