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

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

java IO²Ù×÷ (¶Áд¡¢×·¼Ó¡¢É¾³ý¡¢Òƶ¯¡¢¸´ÖƵÈ)


Ò»¡¢¶àÖÖ·½Ê½¶ÁÎļþÄÚÈÝ¡£
1¡¢°´×Ö½Ú¶ÁÈ¡ÎļþÄÚÈÝ
2¡¢°´×Ö·û¶ÁÈ¡ÎļþÄÚÈÝ
3¡¢°´ÐжÁÈ¡ÎļþÄÚÈÝ
4¡¢Ëæ»ú¶ÁÈ¡ÎļþÄÚÈÝ
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java ......

JSP/Java»ñÈ¡HTTP headerÐÅÏ¢(request)Àý×Ó

<%
//header.jsp
out.println("Protocol: " + request.getProtocol() + "<br>");
out.println("Scheme: " + request.getScheme() + "<br>");
out.println("Server Name: " + request.getServerName() + "<br>" );
out.println(&quo ......

JAVAÅжÏ×Ö·û´®ÊÇ·ñΪÊý×Ö

StringתCharacterÊý×飬ÓÃCharacterµÄisDigitºÍisLetterº¯ÊýÈ¥Åжϡ£
public static boolean isNumeric(String str) {
for (int i = str.length(); i = 0;) {
if (!Character.isDigit(str.charAt(i))) {
return false;
}
}
return true;
}
public static boolean isNumeric(String str) {
Pattern patt ......

java ÈÃÎÒÈçºÎÈ¥°®Äã

Èí¼þ¼¼ÊõµÄѸÃÍ·¢Õ¹ÈÃJava
ÊÀ½çµÄWeb ¿ò¼Ü
ÁìÓò
·çÆðÔÆÓ¿£¬¸÷Öּܹ¹²ã³ö²»Çµ«ÄãÄÇ?
¡¡¡¡»Øµ½ÁùÄêǰµÄ½ñÌì̸ÂÛÕâ¸ö»°Ì⣬ÎÒ»áÍѿڶø³ö£ºStruts. ÄÇÊÇÒ»¸ö¶ÔStruts¼¸ºõ³ç°ÝµÄʱ´ú£¬¼¸ºõûÈË¶ÔÆäÖÊÒÉ¡£ÄÇʱJava
ÊÀ½çµÄWeb

frameworkÊÀ½çÈç´Ë"µ¥´¿"£¬µ¥´¿µÃÈç´Ë¿ìÀÖ¡£
¡¡¡¡¾­µä£¬¿°³Æ¾­µä¡£ÌÈÈôÎÒÔÚ´ËÊ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ