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
±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;
......
»ùÓÚJavaµÄһЩȨÏÞ¿ò¼Ü¼ò½é
JOSSO
JOSSO(Java Open Single Sign-On)ÊÇÒ»¸ö¿ªÔ´µÄJ2EE-basedµÄSSO(SSO£ºµ¥Ò»µÇ¼¼¼ÊõÊÇÒ»ÖÖÈÏÖ¤ºÍÊÚȨ»úÖÆ£¬ËüÔÊÐí×¢²áÓû§Ö»ÐèÒªÔÚÈÎÒ»³ÉÔ±ÍøÕ¾ÉϵǼһ´Î£¬¶øºóÊÚȨ·ÃÎÊÆäËûÁ¬½ÓµÄ·ÖÖ§ÍøÕ¾£¬ÎÞÐèÔÙ½øÐÐÑéÖ¤µÇ¼)»ù´¡½á¹¹.ËüµÄÄ¿µÄÊÇÌṩһÖÖÓÃÀ´½â¾öÔÚÍ³Ò ......
RXTXÊÇÒ»¸ö¿ªÔ´°ü£¬Ö÷ÒªÊÇÔÚCOMM¿ªÔ´°üÖÐ×öÀ©ÕÅ£¬ÒÔǰµÄCOMM°üÖ»ÄÜÔÚWINDOWSÏÂÃæ¶Ô´®¿Ú»ò²¢¿Ú×ö²Ù×÷£¬À©³äºóµÄRXTX¿ÉÒÔÔÚLINUXºÍMAC϶Դ®¿ÚºÍ²¢¿Ú×ö²Ù×÷¡£ ÏÖÔÚ¿çÆ½Ì¨£º
ÔÚRXTXÍøÕ¾ÏÂÔØJAR°üºÍ¶¯Ì¬¿â
http://users.frii.com/jarvi/rxtx/download.html
ÏÂÔØºóÅäÖû·¾³
Windows
¿½±´RXTXcomm.jar Îļþ ......
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
public class TestIO {
public static void main(String[] args) {
String fileName="E://test.txt";
testInputStream(fileName);
}
public static void testInputStre ......
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 ......