javaÈëÃÅ
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÷µÄJDKÊÇSun¹«Ë¾·¢²¼µÄJDK£¬³ýÁËSunÖ®Í⣬»¹Óкܶ๫˾ºÍ×éÖ¯¶¼¿ª·¢ÁË×Ô¼ºµÄJDK£¬ÀýÈçIBM¹«Ë¾¿ª·¢µÄJDK£¬BEA¹«Ë¾µÄJrocket£¬»¹ÓÐGNU×éÖ¯¿ª·¢µÄJDKµÈµÈ¡£ÆäÖÐIBMµÄJDK°üº¬µÄJVM£¨Java Virtual Machine£©ÔËÐÐЧÂÊÒª±ÈSun JDK°üº¬µÄJVM¸ß³öÐí¶à¡£¶ø×¨ÃÅÔËÐÐÔÚx86ƽ̨µÄJrocketÔÚ·þÎñ¶ËÔËÐÐЧÂÊÒ²Òª±ÈSun JDKºÃºÜ¶à¡£µ«²»¹ÜÔõô˵£¬ÎÒÃÇ»¹ÊÇÐèÒªÏȰÑSun JDKÕÆÎպá£
1¡¢ JDKµÄÏÂÔØºÍ°²×°
JDKÓÖ½Ð×öJ2SE£¨Java2 SDK Standard Edition£©£¬¿ÉÒÔ´ÓSunµÄJavaÍøÕ¾ÉÏÏÂÔØµ½£¬http://java.sun.com/j2se/downloads.html ;;;£¬JDKµ±Ç°×îеİ汾ÊÇJ2SDK1.4.2£¬½¨ÒéÏÂÔØ¸Ã°æ±¾µÄJDK£¬ÏÂÔØÒ³ÃæÔÚÕâÀhttp://java.sun.com/j2se/1.4.2/download.html¡£
ÏÂÔØºÃµÄJDKÊÇÒ»¸ö¿ÉÖ´Ðа²×°³ÌÐò£¬Ä¬Èϰ²×°Íê±Ïºó»áÔÚC:Program FilesJavaĿ¼Ï°²×°Ò»Ì×JRE£¨¹©ä¯ÀÀÆ÷À´Ê¹Óã©£¬ÔÚC:j2sdk1.4.2ϰ²×°Ò»Ì×JDK£¨Ò²°üÀ¨Ò»Ì×JRE£©¡£È»ºóÎÒÃÇÐèÒªÔÚ»·¾³±äÁ¿PATHµÄ×îÇ°ÃæÔö¼ÓjavaµÄ·¾¶C:j2sdk1.4.2in¡£ÕâÑùJDK¾Í°²×°ºÃÁË¡£
2¡¢ JDKµÄÃüÁ¾ß
JDKµÄ×îÖØÒªÃüÁîÐй¤¾ß£º
java£º Æô¶¯JVMÖ´ÐÐclass
javac£º Java±àÒëÆ÷
jar£º Java´ò°ü¹¤¾ß
javadoc£º JavaÎĵµÉú³ÉÆ÷
ÕâЩÃüÁîÐбØÐëÒª·Ç³£·Ç³£ÊìϤ£¬¶ÔÓÚÿ¸ö²ÎÊý¶¼ÒªºÜ¾«Í¨²ÅÐС£¶ÔÓÚÕâЩÃüÁîµÄѧϰ£¬JDK DocumentationÉÏÓÐÏêϸµÄÎĵµ¡£
¶þ¡¢ JDK Documentation
DocumentationÔÚJDKµÄÏÂÔØÒ³ÃæÒ²ÓÐÏÂÔØÁ¬½Ó£¬½¨ÒéͬʱÏÂÔØDocumentation¡£DocumentationÊÇ×î×îÖØÒªµÄ±à³ÌÊֲᣬº¸ÇÁËÕû¸öJavaËùÓз½ÃæµÄÄÚÈݵÄÃèÊö¡£¿ÉÒÔÕâÑù˵£¬Ñ§Ï°Java±à³Ì£¬´ó²¿·Öʱ¼ä¶¼ÊÇ»¨ÔÚ¿´Õâ¸öDocumentationÉÏÃæµÄ¡£ÎÒÊÇËæÉíЯ´øµÄ£¬Ð´Java´úÂëµÄʱºò£¬ËæÊ±²é¿´£¬Ðëô§²»ÀëÊÖ¡£
Èý¡¢ Ó¦Ó÷þÎñÆ÷(App Server)
App ServerÊÇÔËÐÐJavaÆóÒµ×é¼þµÄƽ̨£¬¹¹³ÉÁËÓ¦ÓÃÈí¼þµÄÖ÷ÒªÔËÐл·¾³¡£µ±Ç°Ö÷Á÷µÄApp ServerÊÇBEA¹«Ë¾µÄWeblogic&nbs
Ïà¹ØÎĵµ£º
дÈë
public static void Writer(String value) {
try{
File file2 = new File("F:\\countDB.txt");
if(!file2.exists()){
  ......
Ò»ÖøÃûÈí¼þ¹«Ë¾µÄjava±ÊÊÔËã·¨Ì⣡(2008-11-06 12:49:19)±êÇ©£ºjava ÃæÊÔÌâ it ·ÖÀࣺJ2SE
ÔÌâÈçÏ£ºÓÃ1¡¢2¡¢2¡¢3¡¢4¡¢5ÕâÁù¸öÊý×Ö£¬ÓÃjavaдһ¸ömainº¯Êý£¬´òÓ¡³öËùÓв»Í¬µÄÅÅÁУ¬È磺512234¡¢412345µÈ£¬ÒªÇó£º "4 "²»ÄÜÔÚµÚÈý룬 "3 "Óë "5 "²»ÄÜÏàÁ¬.
ÎÒ¿´ÁË»ØÌù¶¼Ã»Óкܺýâ¾ö£¬Ö÷ÒªÊÇûÓÐÅųýÖ ......
³£ÓõÄÉè¼ÆÄ£Ê½·ÖΪÈçÏ 23 ÖÖģʽ£º
Abstract Factory£º
Ìṩһ¸ö´´½¨Ò»ÏµÁÐÏà¹Ø»òÏ໥ÒÀÀµ¶ÔÏóµÄ½Ó¿Ú£¬¶øÎÞÐèÖ¸¶¨ËüÃǾßÌåµÄÀà¡£
Adapter£º
½«Ò»¸öÀàµÄ½Ó¿Úת»»³É¿Í»§Ï£ÍûµÄÁíÒ»¸ö½Ó¿Ú£¬Ê¹µÃÔÀ´ÓÉÓÚ½Ó¿Ú²»¼æÈݶø²»ÄÜÒ»Æð¹¤×÷µÄÄÇЩÀà¿ÉÒÔÒ»Æð¹¤×÷¡£
Bridge£º
½«³éÏ󲿷ÖÓëËüµÄʵÏÖ²¿·Ö·ÖÀ룬ʹ֮¿ÉÒÔ¶ÀÁ¢±ä»¯¡£
C ......
JDK°æ±¾
JDK1.4.x
¹¦ÄÜ
ʵÏÖÁË´øÓи´Ñ¡¿òµÄ×ÊÔ´¹ÜÀíÆ÷Ê÷Ŀ¼£¬»¹ÓÐÐèÒª¸Ä½øµÄµØ·½£¬ÎÒÔÚÒÔºó¸üУ¬Èç¹ûÄÇλÅóÓÑÓкõĽ¨Òé»¶ÓÌá³ö
»¶Ó´ó¼ÒÌáÒâ¼û£¬½»Á÷
......