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

java Timer ѧϰ

TimerλÓÚjava.utilÏÂÃæ£¬Ò»°ã½ÐËûjava¼ÆÊ±Æ÷¡£
javaAPIµÄ½âÊÍÈçÏÂ:
Ò»ÖÖÏß³ÌÉèÊ©£¬ÓÃÓÚ°²ÅÅÒÔºóÔÚºǫ́Ïß³ÌÖÐÖ´ÐеÄÈÎÎñ¡£¿É°²ÅÅÈÎÎñÖ´ÐÐÒ»´Î£¬»òÕß¶¨ÆÚÖØ¸´Ö´ÐС£
ÏÈÀ´¿´¿´Ð§¹û£º
1.Éè¼Æ¼ÆÊ±Æ÷ 
import java.io.IOException;
import java.util.Calendar;
import java.util.Timer;
public class TimerTest {


public static void main(String args[]) {
Timer timer = new Timer();
ÔÚ1ÃëºóÖ´ÐдËÈÎÎñ,ÿ´Î¼ä¸ô2Ãë,Èç¹û´«µÝÒ»¸öData²ÎÊý,¾Í¿ÉÒÔÔÚij¸ö¹Ì¶¨µÄʱ¼äÖ´ÐÐÕâ¸öÈÎÎñ.
timer.schedule(new MyTask(), 1000, 2000);

while (true) {
int ch;
try {
ch = System.in.read();
if (ch - 'c' == 0) {
timer.cancel();// ʹÓÃÕâ¸ö·½·¨Í˳öÈÎÎñ
System.out.println("½áÊøÈÎÎñ!");
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}
}
}

2.²¼ÖÃÈÎÎñ£º
import com.db.BackupMysql;

public class MyTask extends java.util.TimerTask {
@Override
public void run() {

System.out.println("$$$$$ÃÀÔª¶à¶à$$$$$");
}

}


Ïà¹ØÎĵµ£º

JFreeChart (Java¿ªÔ´Í¼±í)

JFCÊÇÒ»¸öÇáÁ¿¼¶µÚÈý·½¿ªÔ´×é¼þ,²»ÒÀÀµÆäËû×é¼þ,ʹÓÃProject¼´¿É¡£
×÷ÓãºÒÔͼ±í·½Ê½Õ¹Ê¾Êý¾Ý
꿅᣼www.jfree.org
Àà¿â£ºJFreeChart¡¢JCommon(JFreeReportºÍJFreeChartµÄ¹«¹²Àà¿â)
Ö¸ÄÏ£º jfreechart-1.0.13-install.pdf
API: jfreechart-1.0.13-javadocs.zip
ѹËõ°ü£ºjfreechart-1.0.13
ant   ......

java»ñÈ¡URLµØÖ·

     String   url=request.getScheme()+"://";  
        url+=request.getHeader("host");  
        url+=request.getRequestURI();  
       ......

java ÖÐ set map table list µÄ×ܽá

1.Collection List Set Map Çø±ð¼ÇÒä
ÕâЩ¶¼´ú±íÁËJavaÖеļ¯ºÏ£¬ÕâÀïÖ÷Òª´ÓÆäÔªËØÊÇ·ñÓÐÐò£¬ÊÇ·ñ¿ÉÖØ¸´À´½øÐÐÇø±ð¼ÇÒ䣬ÒÔ±ãÇ¡µ±µØÊ¹Ó㬵±È»»¹´æÔÚͬ²½·½ÃæµÄ²îÒ죬¼ûÉÏһƪÏà¹ØÎÄÕ¡£
 
ÓÐÐò·ñ
ÔÊÐíÔªËØÖØ¸´·ñ
Collection
·ñ
ÊÇ
List
ÊÇ
ÊÇ
Set
AbstractSet
·ñ
·ñ
HashSet
TreeSet
ÊÇ£¨Óöþ²æÊ÷Å ......

java´´½¨Xml±Ê¼Ç


ÓÃjava´´½¨XmlµÄ4´óÀࣺ
 
Element£º½ÚµãÀà
AttributeÊôÐÔÀà
Document£ºÖ¸µÄ¾ÍÊÇÎĵµÀà
XMLOutput£ºÊä³öÀà
´ËÀàÊÇÓÃjava½¨Á¢Ò»¸öxmlÎļþ
 
public class TestJdom {
    //´´½¨XML£¨Ä£ÐÍ£©dom
    public static void main(String[] args) {
     ......

ٲȻÒѾ­·ÏµôÁË£¨ÖØÐ¼ñÆðJava£©

·ÏÁË¡£2ÄêûÕý¾­ÓùýJavaÁË¡£ÎªÁ˰ïÅóÓÑæ±ØÐëÈ«²¿¼ñÆðÀ´¡£BT¼Æ»®±»ÆÈÔÝÍ£¡£
»¹ÊǺÃÄÔ×Ó²»ÈçÀñÊÍ·¡£
¼ÇÏÂÀ´£º
Java»·¾³±äÁ¿ÉèÖãº
http://blog.csdn.net/aneka/archive/2008/09/19/2948209.aspx
ѧϰ Java ¿ª·¢µÄµÚÒ»²½¾ÍÊǹ¹½¨¿ª·¢»·¾³£¬ÏÂÃæÒÔ JDK6.0 ÔÚ Windows XP ÉϵݲװÅäÖÃΪÀýÀ´½²Êö£º
µÚÒ»²½£ºÏÂÔØ JDK
´ ......
© 2009 ej38.com All Rights Reserved. ¹ØÓÚE½¡ÍøÁªÏµÎÒÃÇ | Õ¾µãµØÍ¼ | ¸ÓICP±¸09004571ºÅ