java ÃæÊÔÌâ59µÀ£¨º¬²Î¿¼´ð°¸£©
Java
»ù´¡·½Ãæ
:
1
¡¢×÷ÓÃÓò
public,private,protected,
ÒÔ¼°²»Ð´Ê±µÄÇø±ð
´ð£º
Çø±ðÈçÏ£º
×÷ÓÃÓò
µ±Ç°Àà
ͬһ
package
×ÓËïÀà
ÆäËû
package
public √ √ √ √
protected √ √ √ ×
friendly √ √ × ×
private √ × × ×
²»Ð´Ê±Ä¬ÈÏΪ
friendly
2
¡¢
Anonymous Inner Class (
ÄäÃûÄÚ²¿Àà
)
ÊÇ·ñ¿ÉÒÔ
extends(
¼Ì³Ð
)
ÆäËüÀ࣬ÊÇ·ñ¿ÉÒÔ
implements(
ʵÏÖ
)interface(
½Ó¿Ú
)
´ð£º
ÄäÃûµÄÄÚ²¿À
Ïà¹ØÎĵµ£º
3.3 ÓαêÑ»·×î¼Ñ²ßÂÔ
ÎÒÃÇÔÚ½øÐÐPL/SQL±à³Ìʱ£¬¾³£ÐèҪѻ·¶ÁÈ¡½á¹û¼¯µÄÊý¾Ý¡£½øÐÐÖðÐд¦Àí£¬Õâ¸ö¹ý³Ì¾ÍÐèÒª¶ÔÓÎ±ê½øÐÐÑ»·¡£¶ÔÓÎ±ê½øÐÐÑ»·µÄ·½·¨ÓжàÖÖ£¬ÎÒÃÇÔÚ´ËÒ»Ò»·ÖÎö¡£
create or replace procedure proccycle(p varchar2)
as
cursor c_postype is select pos_type, description ......
Ò»¡¢Servlet¹ýÂËÆ÷µÄ¸ÅÄ
***************************************************************************************
Servlet¹ýÂËÆ÷ÊÇÔÚJava Servlet¹æ·¶2.3Öж¨ÒåµÄ£¬ËüÄܹ»¶ÔServletÈÝÆ÷µÄÇëÇóºÍÏìÓ¦¶ÔÏó½øÐмì²éºÍÐ޸ġ£¡¡¡¡¡¡
Servlet¹ýÂËÆ÷±¾Éí²¢²»²úÉúÇëÇóºÍÏìÓ¦¶ÔÏó£¬ËüÖ»ÄÜÌṩ¹ýÂË×÷Óá£Servlet¹ýÆÚÄÜ ......
1.java static inner class ºÍ non-static inner classµÄÇø±ð?
2.Çëд³öÒ»¸ösingletonģʽµÄclass.
ÄãÈç¹ûд³öÏÂÃæµÄ2ÖÖÑùʽ,ÎÒ»áÎÊÄã:ÇëÎÊÄãÈçºÎÔÚͬһ¸öjvmÖв¢ÇÒÔÚͬһ¸öclassLoaderÖеõ½ËüµÄ¶à¸öʵÀý?(Çë²»ÒªÆæ¹Ö)
ÑùÁÐ1:
public class Singleton {
private final static Singleton instance= ......
¡¡¡¡javaÖÐÓÐÁ½ÖÖ°üµÄµ¼Èë»úÖÆ£¬×ܽáÈçÏ£º
¡¡¡¡µ¥ÀàÐ͵¼Èë(single-type-import)£¬ÀýÈçimport java.io.File;
¡¡¡¡°´ÐèÀàÐ͵¼Èë(type-import-on-demand)£¬ÀýÈç import java.io.*;
¡¡¡¡¹ØÓÚÕâÁ½ÖÖµ¼ÈëÀàÐÍ´ó¼Ò¸÷ÓÐËù°®£¬ÖÚ˵·×ç¡¡£ÕâÀï·ÖÎöÒ»ÏÂÕâÁ½ÖÖµ¼ÈëÀàÐ͵ĴóÖ¹¤×÷ÔÀí¹©´ó¼Ò²Î¿¼¡£
¡¡¡¡µ¥ÀàÐ͵¼Èë±È½ÏºÃÀí½â£¬½ö½öµ ......