JavaÄÚ²¿ÀࣨInner Class£©Ïê½â
¼òµ¥µÄ˵£¬ÄÚ²¿£¨inner£©ÀàÖ¸ÄÇЩÀඨÒå´úÂë±»ÖÃÓÚÆäËüÀඨÒåÖеÄÀࣻ¶ø¶ÔÓÚÒ»°ãµÄ¡¢ÀඨÒå´úÂ벻ǶÌ×ÔÚÆäËüÀඨÒåÖеÄÀ࣬³ÆÎª¶¥²ã£¨top-level£©Àà¡£¶ÔÓÚÒ»¸öÄÚ²¿À࣬°üº¬Æä¶¨Òå´úÂëµÄÀà³ÆÎªËüµÄÍⲿ£¨outer£©Àà¡£
1 Static member class£¨¾²Ì¬³ÉÔ±Àࣩ
ÀàÉùÃ÷Öаüº¬“static”¹Ø¼ü×ÖµÄÄÚ²¿Àà¡£ÈçÒÔÏÂʾÀý´úÂ룬
Inner1/Inner2/Inner3/Inner4¾ÍÊÇOuterµÄËĸö¾²Ì¬³ÉÔ±Àà¡£¾²Ì¬³ÉÔ±ÀàµÄʹÓ÷½Ê½ÓëÒ»°ã¶¥²ãÀàµÄʹÓ÷½Ê½»ù±¾Ïàͬ¡£
public class Outer{
//just like static method, static member class has public/private/default access privilege levels
//access privilege level: public
public static class Inner1 {
public Inner1() {
//Static member inner class can access static method of outer class
staticMethod();
//Compile error: static member inner class can not access instance method of outer class
//instanceMethod();
}
}
//access privilege level: default
static class Inner2 {
}
//access privilege level: private
Ïà¹ØÎĵµ£º
Java³ÉÔ±µÄĬÈÏ·ÃÎÊ¿ØÖÆ
ÎÒ¶¥¶ÔÓÚÒ»¸öClassµÄ³ÉÔ±±äÁ¿»ò³ÉÔ±º¯Êý£¬Èç¹û²»ÓÃpublic, protected, privateÖеÄÈκÎÒ»¸öÐÞÊΣ¬ÄÇô¸Ã³ÉÔ±»ñµÃ“ĬÈÏ·ÃÎÊ¿ØÖÆ”¼¶±ð£¬¼´package access £¨°ü·ÃÎÊ£©¡£
ÊôÓÚpackage accessµÄ³ÉÔ±¿ÉÒÔ±»Í¬Ò»¸ö°üÖÐµÄÆäËûÀà·ÃÎÊ£¬µ«²»Äܱ»ÆäËû°üµÄÀà·ÃÎÊ¡£
° ......
JavaÖÐÒì³£Ò»°ã·ÖΪ3À࣬ϱ߽éÉÜÏ£¬½ö½öÊǸöÈËÀí½â¡£
µÚÒ»ÖÖÊDZàÒëÆÚÒì³££¬»òÕß½Ðcheck Exception¡£
±àÒëÆÚÒì³£µÄÌØµã£º
1.ϵͳҪÇó±ØÐëÔÚ³ÌÐòÀï×ö³ö´¦Àí£¬·ñÔò±¨±àÒë´íÎ󣬱àÒëÎÞ·¨Í¨¹ý£¬Ò²¾ÍÊÇËµÏµÍ³Ç¿ÖÆÒªÇó´¦Àí£¬¶ÔÓÚ´¦Àí·½Ê½£¬²»ÍâºõÖ±½Ócatch´¦ÀíºÍÅ׳öµ½Íâ²ã£¬µ«ÊÇ×îÖÕ»¹ÊÇÒª´¦ÀíµÄ¡£
2.Óû§×Ô¶¨ÒåÒ»¸ö±àÒëÆÚÒ ......
1.»ù±¾¸ÅÄîµÄÀí½â
¡¡¡¡¾ø¶Ô·¾¶£º¾ø¶Ô·¾¶¾ÍÊÇÄãµÄÖ÷Ò³ÉϵÄÎļþ»òĿ¼ÔÚÓ²ÅÌÉÏÕæÕýµÄ·¾¶£¬(URLºÍÎïÀí·¾¶)ÀýÈ磺
C:\xyz\test.txt ´ú±íÁËtest.txtÎļþµÄ¾ø¶Ô·¾¶¡£http://www.sun.com/index.htmÒ²´ú±íÁËÒ»¸ö
URL¾ø¶Ô·¾¶¡£
¡¡¡¡Ïà¶Ô·¾¶£ºÏà¶ÔÓëij¸ö»ù׼Ŀ¼µÄ·¾¶¡£°üº¬WebµÄÏà¶Ô·¾¶£¨HTMLÖеÄÏà¶ÔĿ¼£©£¬ÀýÈ磺ÔÚ
......
tomcatΪһ¸öjspºÍservletµÄÈÝÆ÷£¬µ«Ëü³ýÁËÕâ¸öÍ⻹×Ô´øÁËweb·þÎñÆ÷¡£Ò²¾ÍÊÇ˵£¬Ëü¼ÈÊÇservletÈÝÆ÷£¬Ò²ÊÇÒ»¸öweb·þÎñÆ÷¡£
ËüÊÇÓÃjava±àдµÄ£¬ÓÃÀ´Ö´ÐÐservletºÍjspµÄ£¬µ«´¦Àí¾²Ì¬×ÊÔ´ÉÏapacheµÈרҵ·þÎñÆ÷¹¦ÄÜÄÇôǿ¡£ËùÒԺܶàÈËÔ¸Ò⽫Á½Õß½áºÏÆðÀ´Ê¹Óá£tomcat´¦Àí¶¯Ì¬Ò³Ãæ£¬¶øappache´¦Àí¾²Ì¬×ÊÔ´£¬ÕâÑùÁ½Õ߸÷È¡Ëù³¤¡£Áí ......
/*
ArrayListÊÇ×î³£ÓõÄListʵÏÖÀ࣬ÄÚ²»ÊÇͨ¹ýÊý×éʵÏֵģ¬ËüÔÊÐí¶ÔÔªËØ½øÐпìËÙËæ»ú·ÃÎÊ¡£Êý×éµÄȱµãÊÇÿ¸öÔªËØÖ®¼ä²»Äܺ¬ÓГ¿Õ϶”£¬µ±Êý×é´óС²»Âú×ãʱÐèÒªÔö¼Ó´æ´¢ÄÜÁ¦£¬¾ÍÒª½«ÒÑÓÐÊý×éÊý¾Ý¸´ÖƵ½ÐµĴ洢¿Õ¼äÖС£µ±´ÓArrayListµÄÖмäλÖòåÈë»òÕßɾ³ýÔªËØÊ±£¬ÐèÒª¶ÔÊý×é½øÐи´ÖÆ¡¢Òƶ¯£¬´ú¼Û±È½Ï¸ß¡£Òò ......