¼ò½à°æjava»ù´¡ÖªÊ¶Ð¡È«
1. »·¾³±äÁ¿µÄÅäÖãºpathºÍclasspathÖ¸Ïòjava/binĿ¼Ï£»
2. javaÓïÑÔµÄÌص㣺¿ÉÒÆÖ²£¬ÃæÏò¶ÔÏ󣬷ֲ¼ÐÔ£¬½¡×³ÐÔ£¬°²È«ÐÔ£¬¼òµ¥ÐÔ£¬¸ßÐÔÄÜ£¬¶àỊ̈߳¬¶¯Ì¬ÐÔ¡£
3. Êý¾ÝÀàÐÍ£º
ÕûÐÍ£º×Ö½ÚÐÍ£¨byte 1×Ö½Ú£© ¶ÌÕûÐÍ£¨short 2×Ö½Ú£© »ù±¾ÐÍ£¨int 4×Ö½Ú£© ³¤ÕûÐÍ£¨long 8×Ö½Ú£©£»
¸¡µãÐÍ£ºµ¥¾«¶È¸¡µã£¨float 4×Ö½Ú£© Ë«¾«¶È¸¡µã£¨double 8×Ö½Ú£©£»Èç1.5E5£¬ -1.7E-7£»
ĬÈÏË«¾«¶È£¬Èç¹ûÖ¸¶¨µ¥¾«¶È£¬Ð´·¨£º1.5F»ò1.5f£»
×Ö·ûÐÍ£ºÓëc/c++²»Í¬£¬charÊÇ2×Ö½Ú£¬´æ·ÅµÄ²»ÊÇASCIIÂ룬¶øÊÇUnicodeÂë¡£
²¼¶ûÐÍ£ºtrueºÍfalse£¬Óëc/c++²»Í¬£¬²»ÄÜÓÃÕûÐÍÖµ±íʾÂß¼½á¹û£¬Ö»ÄÜÓò¼¶ûÐÍ¡£
³£Á¿£ºfinal intMALE=1; final eight=o11£» final sixth=oxFF;
±äÁ¿£ºint test=1£»java±äÁ¿±ØÐëÉèÖóõʼ»¯Öµ¡£
4. Á÷³Ì¿ØÖÆÓï¾ä£º
¿ÕÓï¾ä£º±í´ïʽºóÃæ¼ÓÒ»¸ö·ÖºÅ£¬È磺“b=a£» £»”
¿éÓï¾ä£ºÐ´ÔÚ´óÀ¨ºÅÖГ{b=a£»}”
if(){} if(){}else{} if(){}else if(){} else if(){}else{} switch(key){case key: aa(); break;}
while(){} do{}while(); for(){}
5. ´ø±êºÅµÄbreakºÍcontinue£º
outer: for(){... break outer;} outer: for(){... continue outer;}
6. ×¢ÊÍ£º
ÐÐ×¢ÊÍ£º // ; ¿é×¢ÊÍ /* .. */ ; Îĵµ×¢ÊÍ /** ... */ ;
7. ÃæÏò¶ÔÏóµÄËĸö»ù±¾ÌØÕ÷£º³éÏóÐÔ£¬·â×°ÐÔ£¬¼Ì³ÐÐÔ£¬¶à̬ÐÔ£»
³éÏó£ºÄ£ÄâÎïÀíʵÌåºÍÂ߼ʵÌå¡£
·â×°£º½«Êý¾ÝÒÔ¼°²Ù×÷·½·¨×éÖ¯ÔÚÒ»Æð£¬ÐγɶÀÁ¢¹¹¼þ£¬´Ó¶øʹÍⲿÎÞ·¨·ÃÎÊ£¬³ý·Çͨ¹ý½Ó¿Ú£¨interface£©£»
¼Ì³Ð£º´Ó¸¸ÀàÅÉÉú³ö×ÓÀ࣬ʹ×ÓÀà×Ô¶¯ÓµÓи¸ÀàµÄ·½·¨ºÍÊôÐÔ£»
¶à̬£ºÔÊÐí²»Í¬ÀàµÄ¶ÔÏó¶ÔͬһÏûÏ¢×ö³öÏìÓ¦£¬´Ó¶ø²úÉú²»Í¬Ð§¹û¡£°üÀ¨²ÎÊý»¯¶à̬ÐÔºÍÔËÐз½·¨¶à̬ÐÔ£»
¶ÔÏó£ºÒ»¸öÎïÀí»òÂ߼ʵÌ壬ÊÇpcÄ£ÄâÕæÊÇÊÀ½çµÄÒ»¸ö³éÏó¡£ÀàµÄʵÀý»¯£»
Àࣺ¶ÔÏóµÄÄ£°å£¬¾ßÓÐͬÀàÌØÕ÷µÄ¶ÔÏóµÄ¼¯ºÏ¡£
ÏûÏ¢£º¶ÔÏó¼äͨ¹ýÏûϢʵÏÖÏ໥×÷Ó᣷Ö3²¿·Ö£¬½ÓÊܶÔÏ󣬽ÓÊÜÕßÖ´Ðеķ½·¨£¬·½·¨µÄ²ÎÊý£»
8. ÀàµÄÐÞÊηû£º
&nb
Ïà¹ØÎĵµ£º
ÔÚJavaÖУ¬²»Í¬µÄÀ඼ÓÐ×Ô¼ºµ¥¶ÀµÄCache»úÖÆ£¬ÊµÏֵķ½·¨Ò²¿ÉÄÜÓÐËù²»Í¬£¬ÎÄÕÂÁоÙÁËJavaÖг£¼ûµÄ¸÷ÀàCache»úÖƵÄʵÏÖ·½·¨£¬Í¬Ê±½øÐÐÁË×ۺϵıȽϡ£
OSCache
OSCacheÊǸöÒ»¸ö¹ã·º²ÉÓõĸßÐÔÄܵÄJava EE»º´æ¿ò¼Ü£¬OSCacheÄÜÓÃÓÚÈκÎJavaÓ¦ÓóÌÐòµÄÆÕͨµÄ»º´æ½â¾ö·½°¸¡£
OSCacheÓÐÒÔÏÂÌص㣺»º´æÈκζÔÏó£¬Äã¿ÉÒÔ²»ÊÜÏÞÖƵ ......
̽Ë÷ Java ͬ²½»úÖÆ http://www.ibm.com/developerworks/cn/java/j-lo-synchronized/ Monitor Object ²¢·¢Ä£Ê½ÔÚ Java ͬ²½»úÖÆÖеÄʵÏÖ ¼¶±ð£º Öм¶ Àî Èýºì (lisanh@cn.ibm.com), ¸ß¼¶Èí¼þ¹¤³Ìʦ, IBM 2008 Äê 12 Ô 26 ÈÕ
±¾ÎÄ´ÓµäÐ굀 Monitor Object Éè¼ÆģʽÈëÊÖ£¬´ÓÒ»¸öеÄÊӽǣ¬À ......
System.out.println(System.getProperty("java.version")); //java°æ±¾ºÅ
System.out.println(System.getProperty("java.vendor")); //JavaÌṩÉÌÃû³Æ
System.out.println(System.getProperty("java.vendor.url")); //JavaÌṩÉÌÍøÕ¾
System.out.println( ......