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

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 ......

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 ......

java¼Òô³ÌÐò

 
±¾ÈËÍøÉÏÊÕ¼¯µÄÁ½¸öjava
¼Òô³ÌÐò,ÎÄÕ³ö´¦²»¼ÇµÃÁË.
³ÌÐò1:
 import javax.sound.sampled.*;
import javax.swing.JFrame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.Toolkit;
import javax.swing.JPanel;
import java.awt.event.ActionListener;
......

JavaÖÐCalendarºÍDateµÄһЩʹÓÃÓ÷¨¼¼ÇÉ

1. Èç¹ûÒѾ­ÖªµÀij¸öµØµãµÄÊ±Çø£¬Ä꣬Ô£¬ÈÕ£¬Ê±£¬·Ö£¬Ã룬ϣÍûµÃµ½×ª»»ºóµÄ±¾ÏµÍ³Ê±¼ä£¬¿ÉÒÔ²ÉÓÃÈçÏµķ½·¨£º
·½·¨£º¼ÙÉèÊ±ÇøÊÇGMT+08:00,£¬ÄêÊÇ2009Ä꣬ÔÂÊÇ11Ô£¬ÈÕÊÇ7ÈÕ£¬Ê±ÊÇ10ʱ£¬·ÖÊÇ50·Ö£¬ÃëÊÇ30¡£
public class Time {
 
 public static void main(String[] args) {
  TimeZone tz = Tim ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ