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

javaÖÐÌæ»»ÎʺÅ

String srt="abc?abc";
str.replaceAll("?", "#");
»áÌáʾÕâÑùµÄ´íÎó
Dangling meta character '?' near index 0
?
^
at java.util.regex.Pattern.error(Unknown Source)
at java.util.regex.Pattern.sequence(Unknown Source)
at java.util.regex.Pattern.expr(Unknown Source)
at java.util.regex.Pattern.compile(Unknown Source)
at java.util.regex.Pattern.<init>(Unknown Source)
at java.util.regex.Pattern.compile(Unknown Source)
at java.lang.String.replaceAll(Unknown Source)
str.replaceAll("[?]", "#");
ÕâÑùд¾Í¿ÉÒÔÁË


Ïà¹ØÎĵµ£º

¹¦ÄÜÍêÉÆµÄJavaÁ¬½Ó³Øµ÷ÓÃʵÀý


/**
* Title: ConnectPool.java
* Description: Á¬½Ó³Ø¹ÜÀíÆ÷
* Copyright: Copyright (c) 2002/12/25
* Company:
* Author :
* Version 2.0
*/
import java.io.*;
import java.sql.*;
import java.util.*;
import java.util.Date;
/**
* ¹ÜÀíÀàDBConnectionManagerÖ§³Ö¶ÔÒ»¸ö»ò¶à¸öÓÉÊôÐÔÎļ ......

JavaÖз½·¨ÃüÃû¾­Ñé

JavaÖз½·¨ÃüÃûÒ»°ãÊÇ£º¶¯´Ê/¶¯´ÊÐÔ´Ê×飬Ê××ÖĸСд£¬Öм䵥´ÊµÄÊ××Öĸ´óд£¬ÆäËü×ÖĸСд¡£
¾¡Á¿Ó¦Óüòµ¥µÄ¡¢³£Óõĵ¥´Ê£¬Ê¾Àý:
get/set                          first/last
add/remove& ......

java·½·¨µÄÖØÔØÓ븲¸Ç

java¶à̬µÄ2ÖÖ±íÏÖÐÎʽ ·½·¨ÖØÔغͷ½·¨¸²¸Ç
·½·¨ÖØÔØ£ºÍ¬Ò»¸öÀàÖУ¬·½·¨ÃûÏàͬ£¬²ÎÊýÁÐ±í²»Í¬µÄ2¸ö»ò¶à¸ö·½·¨¹¹³É·½·¨µÄÖØÔØ¡£
·½·¨¸²¸Ç£º×ÓÀàÖØÐÂʵÏÖÁ˸¸ÀàÖеķ½·¨¡£
·½·¨ÖØÔØ
/**
* ·½·¨ÖØÔØÂú×ãµÄÌõ¼þ
* ͬһ¸öÀàÖУ¬·½·¨ÃûÏàͬ£¬²ÎÊýÁÐ±í²»Í¬µÄ2¸ö»ò¶à¸ö·½·¨¹¹³É·½·¨µÄÖØÔØ
* ²ÎÊýÁÐ±í²»Í¬Ö¸²ÎÊýµÄÀàÐÍ£¬²Î ......

zz: dz̸JavaµÄÊäÈëÊä³öÁ÷

 JavaÓïÑÔµÄÊäÈëÊä³ö¹¦ÄÜÊÇÊ®·ÖÇ¿´ó¶øÁé»îµÄ£¬ÃÀÖв»×ãµÄÊÇ¿´ÉÏÈ¥ÊäÈëÊä³öµÄ´úÂë²¢²»ÊǺܼò½à£¬ÒòΪÄãÍùÍùÐèÒª°ü×°Ðí¶à²»Í¬µÄ¶ÔÏó¡£ÔÚJavaÀà¿âÖУ¬IO²¿·ÖµÄÄÚÈÝÊǺÜÅÓ´óµÄ£¬ÒòΪËüÉæ¼°µÄÁìÓòºÜ¹ã·º:±ê×¼ÊäÈëÊä³ö£¬ÎļþµÄ²Ù×÷£¬ÍøÂçÉϵÄÊý¾ÝÁ÷£¬×Ö·û´®Á÷£¬¶ÔÏóÁ÷£¬zipÎļþÁ÷....±¾ÎĵÄÄ¿µÄÊÇΪ´ó¼Ò×öÒ»¸ö¼òÒªµÄ½éÉÜ¡£ ......

Java¶ÁȡͼƬÎļþµÄ¿í¶ÈºÍ¸ß¶È

InputStream is = new FileInputStream(filename);//ͨ¹ýÎļþÃû³Æ¶ÁÈ¡
»ò
InputStream is =new ByteArrayInputStream(byte[] a);//ͨ¹ýÎļþµÄ×Ö½ÚÊý×é¶ÁÈ¡
BufferedImage buff = ImageIO.read(is);
buff.getWidth();¡¡//µÃµ½Í¼Æ¬µÄ¿í¶È
buff.getHeight();  //µÃµ½Í¼Æ¬µÄ¸ß¶È
is.close(); //¹Ø±ÕStream ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ