ת£ºÉîÈëÀí½âjava¶à̬ÐÔ
¿´µ½ÕâÆª¹ØÓÚJava¶à̬µÄÌû×Ó£¬¾õµÃºÜ¶à£¬»ù±¾º¸ÇÁËJava¶à̬µÄ¸÷ÖÖ³¡¾°£¬ÕâÀïת¸ø´ó¼Ò²Î¿¼£º
http://blog.csdn.net/thinkghoster/archive/2008/04/19/2307001.aspx
ÉîÈëÀí½âjava¶à̬ÐÔ
×òÌì¿´µ½Ò»¸ö¹ØÓÚ¶à̬ÐÔµÄÌû×Ó£¬²Î¿¼ÁË»ØÌûÕßµÄÀí½â£¬¼ÓÈëÁËһЩ×Ô¼ºµÄ¿´·¨£¬ÕûÀí³öÀ´¹©´ó¼Ò²Î¿¼£¬²»Ò»¶¨ÍêÈ«ÕýÈ·£¬»¶Ó´ó¼ÒÅúÆÀÖ¸Õý¡£
£¨Ò»£©Ïà¹ØÀà
class
A
...
{
public
String show(D obj)
...
{
return
(
"
A and D
"
);
}
public
String show(A obj)
...
{
return
(
"
A and A
"
);
}
}
class
B
extends
A
...
{
public
String show(B obj)
...
{
return
(
"
B and B
"
);
}
public
String show(A obj)
...
{
return
(
"
B and A
"
);
}
}
class
C
extends
B
...
{}
class
D
extends
B
...
{}
£¨¶þ£©ÎÊÌ⣺ÒÔÏÂÊä³ö½á¹ûÊÇʲô£¿
A a1
=
new
A();
Ïà¹ØÎĵµ£º
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 ......
Java NIO APIÏê½â
ÔÚJDK
1.4ÒÔǰ£¬JavaµÄIO²Ù×÷¼¯ÖÐÔÚjava.ioÕâ¸ö°üÖУ¬ÊÇ»ùÓÚÁ÷µÄ×èÈû£¨blocking£©API¡£¶ÔÓÚ´ó¶àÊýÓ¦ÓÃÀ´Ëµ£¬ÕâÑùµÄAPIʹÓúܷ½
±ã£¬È»¶ø£¬Ò»Ð©¶ÔÐÔÄÜÒªÇó½Ï¸ßµÄÓ¦Óã¬ÓÈÆäÊÇ·þÎñ¶ËÓ¦Óã¬ÍùÍùÐèÒªÒ»¸ö¸üΪÓÐЧµÄ·½Ê½À´´¦ÀíIO¡£´ÓJDK 1.4Æð£¬NIO
API×÷Ϊһ¸ö»ùÓÚ»º³åÇø£¬²¢ÄÜÌṩ·Ç×èÈû(non-blo ......
18.×öÒ»¸öµ¥×ÓģʽµÄÀֻ࣬¼ÓÔØÒ»´ÎÊôÐÔÎļþ
package com.softeem.demo;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
/**
*@authorleno
*µ¥×Óģʽ£¬±£Ö¤ÔÚÕû¸öÓ¦ÓÃÆÚ¼äÖ»¼ÓÔØÒ ......
´úÀí·þÎñÆ÷µÄÓ¦Ó÷dz£¹ã·º¡£±ÈÈ磬ÔÚÆóÒµÍøÄÚ²¿£¬Ëü¿ÉÒÔÓÃÀ´¿ØÖÆÔ±¹¤ÔÚ¹¤×÷ʱä¯ÀÀµÄInternetÄÚÈÝ£¬×èÖ¹Ô±¹¤·ÃÎÊijЩÀàÐÍ
µÄÄÚÈÝ»òijЩָ¶¨µÄÍøÕ¾¡£´úÀí·þÎñÆ÷ʵ¼ÊÉϰçÑÝ×Åä¯ÀÀÆ÷ºÍWeb·þÎñÆ÷Ö®¼äµÄÖмäÈ˵ĽÇÉ«£¬Äܹ»¶Ôä¯ÀÀÆ÷ÇëÇó½øÐи÷ÖÖ¸÷ÑùµÄ´¦Àí£¬Äܹ»¹ýÂË¹ã¸æºÍ
Cookie£¬Äܹ»Ô¤ÏÈÌáÈ¡WebÒ³Ãæ£¬Ê¹µÃä¯ÀÀÆ÷·ÃÎÊ ......
//±¾³ÌÐòÁ¬½ÓµÄÊÇsql server 2005£¬ÓëÁ¬½Ósql server 2000Óе㲻ͬ£ºdriverNameºÍURL¶¼²»Í¬
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class create{
public void getConnection() th ......