[תÔØ] javaÍêÃÀ¾µä¶ÁÊé±Ê¼Ç
javaÍêÃÀ¾µä¶ÁÊé±Ê¼Ç
µÚÒ»Õ ¸ÅÊö
µÚ¶þÕ JAVAÓïÑÔ»ù´¡
¡ù¹Ø¼ü×Ö£º
»ù±¾Êý¾ÝÀàÐÍ£º byte short int char long float double boolean
Ñ»·¿ØÖÆ£º do while for break continue
·ÖÖ§¿ØÖÆ£º if else switch case default break
·½·¨ ±äÁ¿ ºÍÀàµÃÐÞÊ讣º private public protected final static abstract
synchronized volatile strictfp transient
×ÖÃæÖµ³£Á¿£º false true null
·½·¨Ïà¹ØµÃ¹Ø¼ü×Ö£º return void
°üÏà¹ØµÃ¹Ø¼ü×Ö£º package import
Òì³£´¦Àí£º try catch finally throw throws
¶ÔÏóÏà¹Ø£º new extends implements super class instanceof this
¡ùºÜ¶àËãÊõÔËËã²Ù×÷¿ÉÒÔ²úÉú¸¡µãÐÍÎÞ·¨±í´ïµÄÊý×Ö£¬ÈçÎÞÏÞ´ó£¬ÎÞÏÞСµÈ£¬ÕâЩÊý¾ÝµÄ±í´ïͨ¹ý¸¡µãÊý·â×°ÀࣨFloatºÍDouble£©ËùÌṩµÄÌØÊâÊôÐÔÀ´±í´ï¡£
Float.NaN ·ÇÊý×Ö
Float.NEGATIVE_INFINITY ÎÞÏÞС
Float.POSITIVE_INFINITY ÎÞÏÞ´ó
Double.NaN ·ÇÊý×Ö
Double.NEGATIVE_INFINITY ÎÞÏÞС
Double.POSITIVE_INFINITY ÎÞÏÞ´ó
Êý¾ÝÀàÐ͵Ä×Ô¶¯×ª»»Í¼£º
char--->{
int-->long-->float-->double
byte-->short-->{
¡ùÄÚÖÃÀà¶ÔÓ¦µÄ»ù±¾ÀàÐÍ£º
Byte-->byte;Short-->short;Integer-->int;Long-->long;Float-->float;Double-->double
Boolean-->boolean;Character-->char;String-->char[]
¡ù½«»ù±¾Êý¾ÝÀàÐÍתΪStringÀàÐÍ£ºstring str1; int intv1=300; str1=String.valueOf(intv1);
½«stri
Ïà¹ØÎĵµ£º
µ¥ÀàÐ͵¼È루single-type-import£©£¬ÀýÈçimport java.io.File£»
¡¡¡¡°´ÐèÀàÐ͵¼È루type-import-on-demand£©£¬ÀýÈç import java.io.*£»
¡¡¡¡¹ØÓÚÕâÁ½ÖÖµ¼ÈëÀàÐÍ´ó¼Ò¸÷ÓÐËù°®£¬ÖÚ˵·×ç¡¡£ÕâÀï·ÖÎöÒ»ÏÂÕâÁ½ÖÖµ¼ÈëÀàÐ͵ĴóÖ¹¤×÷ÔÀí¹©´ó¼Ò²Î¿¼¡£
¡¡¡¡µ¥ÀàÐ͵¼Èë±È½ÏºÃÀí½â£¬½ö½öµ¼ÈëÒ»¸öpu ......
1¡¢Timer½éÉÜ
½¨Á¢ÈÎÎñ£ºÊ¹ÓÃTimerµ÷¶ÈµÄÈÎÎñÓ¦¸Ã¼Ì³ÐTimerTask³éÏóÀ࣬¸ÃÀàʵÏÖRunnable½Ó¿Ú£¬ÒòЩ¾ß±¸¶àÏ̵߳ÄÄÜÁ¦£¬ÊµÏָýӿڵÄrun·½·¨£¬¸Ã·½·¨ÊÇÐèÒª¸ß¶ÈµÄÈÎÎñÖ´ÐÐÌå¡£
µ÷¶ÈÈÎÎñ£ºµ÷¶ÈÈÎÎñͨ¹ýTimerÀàÍê³É,µ÷¶ÈÈÎÎñͨ¹ýschedul·½·¨Íê³É£¬²éÒ»ÏÂjava docÎĵµ:
Java´úÂë
void schedule(TimerTask task, Date tim ......
Ò». stream
´ú±íµÄÊÇÈκÎÓÐÄÜÁ¦²ú³öÊý¾ÝµÄÊý¾ÝÔ´£¬»òÊÇÈκÎÓÐÄÜÁ¦½ÓÊÕÊý¾ÝµÄ½ÓÊÕÔ´¡£ÔÚJavaµÄIOÖУ¬ËùÓеÄstream£¨°üÀ¨InputºÍOut stream£©¶¼°üÀ¨Á½ÖÖÀàÐÍ£º
1 ÒÔ×Ö½ÚΪµ¼ÏòµÄstream
ÒÔ×Ö½ÚΪµ¼ÏòµÄstream£¬±íʾÒÔ×Ö½ÚΪµ¥Î»´ÓstreamÖжÁÈ¡»òÍùstreamÖÐдÈëÐÅÏ¢¡£ÒÔ×Ö½ÚΪµ¼ÏòµÄstream°üÀ¨ÏÂÃ漸ÖÖÀàÐÍ£º
Input s ......
ÉùÒô¿ÉÒÔ´´ÔìÒâ¾³£¬´¥·¢åÚÏ룬µ±ÓëÐéÄâͼÏñÏà½áºÏʱ£¬¸ü¼Ó¿ÉÒÔÈÃÕû¸öÊÀ½ç²¼Âú»Ã¾õ¡£ÉùÒôÊǶàýÌå¼¼ÊõµÄ»ù´¡¡£Õâ¾ÍÊÇSun¹«Ë¾µÄJavaýÌå¼¼Êõ¿ª·¢Ð¡×éæÓÚÔ¤±¸Java Sound 1.0 API²¢½«Æä°üº¬ÓÚÏÂÒ»°æ±¾µÄJAVA¿ª·¢¹¤¾ß¿âÖеÄÔÒò¡£
¡¡¡¡ÔÚJAVA2ƽ̨³öÏÖ֮ǰ£¬JAVAÓïÑÔÖ»ÄÜ´¦Àíµç»°ÒôÖʵÄÉùÒô£¬ÒÔµ¥ÉùµÀ8KHZµÄ²ÉÑùƵÂʴ洢Ϊ&mu ......
Java¼ÓÃÜÓë½âÃÜ£¨by quqi99£©
×÷ÕߣºÕÅ»ª ·¢±íÓÚ£º2009-12-31
°æ鬃 ......