java面試常見問題

1???㈠??瀵矽薄???瑰?????浜??歸?⒙???

1.?借薄锛?

?借薄灏辨??蹇界?ヤ?涓?涓婚?涓?涓?褰??????????崇???ｄ??歸???浠ヤ究?村?????版敞??涓?褰??????????崇???歸?????借薄骞朵???绠?浜?瑙ｅ?ㄩ?ㄩ??棰?锛??????????╁?朵腑??涓??ㄥ??锛????朵??ㄩ?ㄥ??缁??????借薄????涓や釜?歸???涓???杩?绋??借薄锛?浜????版???借薄??

2.缁ф?匡?

缁ф?挎??涓?绉???缁?绫葷??灞?娆℃ā??锛?骞朵???璁稿??榧??辯被???????瀹???渚?浜?涓?绉???纭?琛ㄨ堪?辨?х???規???瀵矽薄??涓?涓??扮被??浠ヤ??版????绫諱腑娲劇??锛?杩?涓?杩?绋?绉頒負绫葷戶?褲???扮被缁ф?誇???濮?绫葷???規?э??扮被绉頒負??濮?绫葷??娲劇??绫夥?瀛?绫夥?锛?????濮?绫葷О涓烘?扮被???虹被锛??剁被锛???娲劇??绫誨??浠ヤ?瀹????虹被?ｉ??缁ф?挎?規???瀹?渚?????锛?骞朵?绫誨??浠ヤ慨?規??澧????扮???規?浣誇??撮?????規??????瑕???

3.灏?瑁?锛?

灏?瑁?????杩?绋????版?????磋搗?ワ?瀵規?版????璁塊?????介??杩?宸插??涔??????????㈠??瀵矽薄璁＄??濮?浜?杩?涓??烘??姒?蹇碉??崇?闆??涓?????浠ヨ???缁???涓?绯誨??瀹??ㄨ??娌彙??灏?瑁???瀵矽薄锛?杩?浜?瀵矽薄??杩?涓?涓???淇??ょ???ュ?ｈ?塊???朵?瀵矽薄??

4.?澶????э?

澶????ф??????璁鎬???绫葷??瀵矽薄瀵瑰??涓?娑???浣??哄??搴???澶????у???????闆??澶????у??????澶????с??澶????ц??瑷??鋒???墊椿???借薄??琛?涓哄?變韓??浠ｇ???變韓??浼??匡?寰?濂界??瑙ｅ?充?搴??ㄧ?搴??芥?闆??????棰???

2??String?????烘?????版??绫誨?????

?烘???版??绫誨??????byte??int??char??long??float??double??boolean??short??

java.lang.String绫繪??final绫誨????锛???姝や???浠ョ戶?胯?涓?绫彙??涓??戒慨?矽?涓?绫彙??涓轟???楂?????????绌洪?達???浠?搴?璇ョ??tringBuffer绫?

3??int????Integer???浠?涔??哄??

Java???渚?涓ょ?涓?????绫誨??锛?寮??ㄧ被??????濮?绫誨??锛?????缃?绫誨??锛???Int??java????濮??版??绫誨??锛?Integer??java涓?nt??渚???灏?瑁?绫彙??Java涓烘??涓???濮?绫誨????渚?浜?灏?瑁?绫彙??

??濮?绫誨??灏?瑁?绫?

booleanBoolean

charCharacter

byteByte

shortShort

intInteger

longLong

floatFloat

doubleDouble

寮??ㄧ被??????濮?绫誨????琛?涓哄???ㄤ???锛?骞朵?瀹?浠??鋒??涓?????璇?涔???寮??ㄧ被??????濮?绫誨???鋒??涓??????瑰????ㄦ?锛?瀹?浠?????锛?澶у?????搴???棰?锛?杩?绉?绫誨??浠ュ??绉?绫誨?????版??缁???瀛????褰?寮??ㄧ被??????濮?绫誨???ㄤ???涓?绫葷??瀹?渚??版???舵????瀹???缂虹???箋??瀵矽薄寮??ㄥ??渚???????缂虹???間負?null锛?????濮?绫誨??瀹?渚???????缂虹???間?瀹?浠???绫誨?????熾??

4??String???StringBuffer???哄??

JAVA骞沖?版??渚?浜?涓や釜绫夥?String??StringBuffer锛?瀹?浠???浠ュ?ㄥ??????浣?瀛?绗?覆锛??沖????澶?涓?瀛?绗???瀛?绗??版????杩?涓?String绫繪??渚?浜??闆?間????瑰????瀛?绗?覆????杩?涓?StringBuffer绫繪??渚???瀛?绗?覆杩?琛?淇??廣??褰?浣??ラ??瀛?绗??版??瑕??瑰?????跺??浣?灏卞??浠ヤ嬌??tringBuffer???稿???幫?浣???浠ヤ嬌??tringBuffers?ュ?ㄦ??????瀛?绗??版????

5??杩?琛??跺?甯鎬?涓???寮?甯告??浣?寮???锛?

寮?甯歌〃绀虹?搴?杩?琛?杩?绋?涓????藉?虹?扮????姝ｅ父?舵??锛?杩?琛??跺?甯歌〃绀鴻?????虹????甯告??浣?涓????介???扮??寮?甯革???涓?绉?甯歌?杩?琛???璇???java缂?璇??ㄨ?姹??規?蹇?椤誨０?????哄???藉????????杩?琛??跺?甯革?浣???骞朵?瑕?姹?蹇?椤誨０?????烘??琚????風??杩?琛??跺?甯搞??

6??璇村??ervlet?????藉?ㄦ??锛?骞惰?村??ervlet??CGI???哄????

Servlet琚????″?ㄥ??渚?????锛?瀹瑰?ㄨ?琛???nit?規?锛?璇鋒??拌揪?惰?琛???ervice?規?锛?service?規????ㄦ淳?ｈ?琛?涓?璇鋒?瀵瑰???doXXX?規?锛?doGet锛?doPost锛?绛?锛?褰????″?ㄥ?沖??灏?瀹?渚???姣????跺??璋??ㄥ??estroy?規???

涓?cgi???哄???ㄤ?servlet澶?浜????″?ㄨ?绋?涓?锛?瀹???杩?澶?绾跨??瑰?杩?琛???ervice?規?锛?涓?涓?瀹?渚???浠ユ???′?澶?涓?璇鋒?锛?骞朵??跺??渚?涓???涓?浼???姣?锛???CGI瀵規??涓?璇鋒??戒駭???扮??杩?绋?锛????″??????灏遍??姣?锛???浠ユ????涓?浣?浜?servlet??

7??璇村??rrayList,Vector,?LinkedList??瀛??ㄦ?ц?藉???規??

ArrayList??Vector?芥??浣跨?ㄦ?扮??瑰?瀛??ㄦ?版??锛?姝ゆ?扮???绱??闆ぇ浜?瀹???瀛??ㄧ???版??浠ヤ究澧????????ュ??绱?锛?瀹?浠??藉??璁哥?存?ユ??搴??風儲寮???绱?锛?浣??????ュ??绱?瑕?娑????扮???绱?绉誨?ㄧ????瀛???浣?锛???浠ョ儲寮??版??蹇??????ユ?版?????Vector?變?浣跨?ㄤ?synchronized?規?锛?绾跨?瀹????锛???甯告?ц?戒?杈?ArrayList宸?锛???LinkedList浣跨?ㄥ?????捐〃瀹??闆???????搴??風儲寮??版????瑕?杩?琛???????????????8??EJB???轟???浜?????瀹??扮??锛?骞惰?村??essionBean??EntityBean???哄??锛?StatefulBean??StatelessBean???哄????

????EJB????Session?Bean??Entity?Bean??Message?Driven?Bean锛??轟?JNDI??RMI??JAT绛?????瀹??般??

SessionBean??2EE搴??ㄧ?搴?涓?琚??ㄦ?ュ????涓?浜????″?ㄧ????涓??℃??浣?锛?渚?濡?璁塊???版??搴???璋??ㄥ?朵?EJB缁?浠躲??EntityBean琚??ㄦ?ヤ唬琛ㄥ??ㄧ郴缁?涓??ㄥ?扮???版????

瀵逛?瀹㈡?鋒?猴?SessionBean??涓?绉?????涔??у?矽薄锛?瀹?瀹??版??浜??ㄦ???″?ㄤ?杩?琛???涓??￠?昏???

瀵逛?瀹㈡?鋒?猴?EntityBean??涓?绉???涔??у?矽薄锛?瀹?浠ｈ〃涓?涓?瀛??ㄥ?ㄦ??涔??у???ㄥ?ㄤ腑??瀹?浣???瀵矽薄瑙??撅?????涓?涓??辯?版??浼?涓?搴??ㄧ?搴?瀹??扮??瀹?浣???

Session?Bean?杩???浠ュ??缁???涓郝?Stateful?Session?Bean?涓??Stateless?Session?Bean?锛?杩?涓ょ????Session?Bean?藉??浠ュ?绯葷??昏??懼???method涔?涓??ц?锛?涓????????Stateful?Session?Bean???浠ヨ?闆??煎???????舵??锛???姝ら??甯告?ヨ?達?涓?涓?浣跨?ㄨ??浼???涓?涓??稿?瑰????Stateful?Session?Bean???瀹?浣???Stateless?Session?Bean??界?朵????昏?缁?浠訛?浣???浠??翠?璐?璐ｈ?闆?浣跨?ㄨ???舵??锛?涔?灏辨??璇村?浣跨?ㄨ???煎???Stateless?Session?Bean????跺??锛?EJB?Container?骞朵?浼??懼?葷?瑰?????Stateless?Session?Bean???瀹?浣??ユ?ц?杩?涓??method???㈣?涔?锛?寰????芥?頒釜浣跨?ㄨ???ㄦ?ц???涓??Stateless?Session?Bean????methods??訛?浼?????涓?涓??Bean????Instance??ㄦ?ц???浠???瀛??歸?㈡?ョ??锛??Stateful?Session?Bean?涓??Stateless?Session?Bean?姣?杈?锛??Stateful?Session?Bean?浼?娑????J2EE?Server?杈?澶?????瀛?锛??惰???Stateful?Session?Bean???浼??垮?村?ㄤ?浠???浠ョ淮??浣跨?ㄨ?????舵????

9??Collection????Collections???哄?????

????Collection??????绫葷??涓?绾ф?ュ?ｏ?缁ф?誇?浠????ュ?ｄ富瑕???Set???List.

Collections????瀵歸????绫葷??涓?涓?甯??╃被锛?浠???渚?涓?绯誨???????規?瀹??闆?瑰??绉?????????绱?????搴???绾跨?瀹??ㄥ??绛???浣???

10??&??&&???哄?????

????&??浣?杩?绠?绗??琛ㄧず??浣?涓?杩?绠?锛?&&???昏?杩?绠?绗??琛ㄧず?昏?涓?锛?and锛???

11??HashMap??Hashtable???哄?????

????HashMap??Hashtable??杞婚??绾у???幫???绾跨?瀹??ㄧ??瀹??幫?锛?浠?浠??藉????浜?Map?ュ?ｏ?涓昏??哄???ㄤ?HashMap??璁哥┖锛?null锛????鹼?key锛?,?變???绾跨?瀹????????涓????介??浜?Hashtable??

HashMap??璁稿?null浣?涓轟?涓?entry??key????value锛???Hashtable涓???璁搞??

HashMap??Hashtable??contains?規??繪??浜?锛??規??containsvalue??containsKey????涓?ontains?規?瀹規??璁╀漢寮?璧瘋??瑙ｃ???

Hashtable缁ф?胯??Dictionary绫夥???HashMap??Java1.2寮?杩???Map?interface??涓?涓?瀹??般??

??澶х??涓?????锛?Hashtable???規???Synchronize??锛???HashMap涓???锛??ㄥ?涓?绾跨?璁塊??Hashtable?訛?涓???瑕???宸變負瀹????規?瀹??闆??姝ワ???HashMap?灏卞?椤諱負涔???渚?澶???姝ャ???

Hashtable??HashMap???ㄧ??hash/rehash绠?娉??藉ぇ姒?涓??鳳???浠ユ?ц?戒?浼???寰?澶х??宸?寮???

12??final,?finally,?finalize???哄?????

????final??ㄤ?澹版??灞??э??規???绫夥?????琛ㄧず灞??т?????锛??規?涓???瑕???锛?绫諱???缁ф?褲??

finally??寮?甯稿???璇??ョ?????涓??ㄥ??锛?琛ㄧず?繪???ц???

finalize??Object绫葷??涓?涓??規?锛??ㄥ???炬?堕???ㄦ?ц????跺??浼?璋??ㄨ????跺?矽薄??姝ゆ?規?锛???浠ヨ???姝ゆ?規???渚????炬?堕???剁???朵?璧?婧????訛?渚?濡??抽????浠剁????

13??sleep()????wait()???浠?涔??哄????

????sleep??绾跨?绫夥?Thread锛????規?锛?瀵艱?存?ょ嚎绋??????ц???瀹??堕?達?缁??ц??轟?缁??朵?绾跨?锛?浣??????х?舵??渚??朵???锛??版?跺??浼????ㄦ?㈠???璋???leep涓?浼????懼?矽薄????

wait??Object绫葷???規?锛?瀵規?ゅ?矽薄璋???ait?規?瀵艱?存??绾跨??懼?瀵矽薄??锛?杩??ョ??寰?姝ゅ?矽薄??绛?寰???瀹?姹?锛???????瀵規?ゅ?矽薄????otify?規?锛???notifyAll锛?????绾跨???杩??ュ?矽薄??瀹?姹???澶??峰?瀵矽薄??杩??ヨ?琛??舵????

14??Overload??Override???哄????Overloaded???規???????浠ユ?瑰??杩????肩??绫誨???

?規???????Overriding????杞?verloading??Java澶????х??涓???琛ㄧ?般??????Overriding???剁被涓?瀛?绫諱??村????х??涓?绉?琛ㄧ?幫???杞?verloading??涓?涓?绫諱腑澶????х??涓?绉?琛ㄧ?般??濡????ㄥ??绫諱腑瀹?涔????規?涓??剁?剁被???稿??????绉闆?????幫???浠?璇磋?ユ?規?琚??????(Overriding)??瀛?绫葷??瀵矽薄浣跨?ㄨ?涓??規??訛?灏?璋??ㄥ??绫諱腑??瀹?涔?锛?瀵瑰????瑷?锛??剁被涓???瀹?涔?濡???琚?"灞???浜???濡????ㄤ?涓?绫諱腑瀹?涔?浜?澶?涓????????規?锛?瀹?浠?????涓????????頒釜?版????涓????????扮被??锛???绉頒負?規?????杞?Overloading)??Overloaded???規?????浠ユ?瑰??杩????肩??绫誨????

15??error??exception??浠?涔??哄???

error?琛ㄧず?㈠?涓???涓????戒?寰??伴?劇?????典???涓?绉?涓ラ????棰???姣?濡?璇村??瀛?婧㈠?恒??涓????芥????绋?搴??藉???杩??風?????點??

????exception?琛ㄧず涓?绉?璁捐?℃??瀹??伴??棰???涔?灏辨??璇達?瀹?琛ㄧず濡???绋?搴?杩?琛?姝ｅ父锛?浠?涓?浼??????????點??

16????姝ュ??寮?姝ユ??浣?寮???锛??ㄤ?涔????典?????浣跨?ㄤ?浠?锛?涓句?璇存????

濡????版??灏??ㄧ嚎绋??村?變韓??渚?濡?姝ｅ?ㄥ?????版??浠ュ?????借????涓?绾跨?璇誨?幫?????姝ｅ?ㄨ?葷???版?????藉凡缁?琚????涓?绾跨???杩?浜?锛??ｄ?杩?浜??版??灏辨???變韓?版??锛?蹇?椤昏?琛???姝ュ??????

褰?搴??ㄧ?搴??ㄥ?矽薄涓?璋??ㄤ?涓?涓???瑕??辮垂寰??挎?堕?存?ユ?ц????規?锛?骞朵?涓?甯???璁╃?搴?绛?寰??規???杩????訛?灏卞?璇ヤ嬌?ㄥ?姝ョ?绋?锛??ㄥ?澶????典????ㄥ?姝ラ??寰?寰?寰??存????????

17??abstract?class??interface??浠?涔??哄???

澹版???規???瀛??ㄨ??涓??誨???闆????绫昏??????借薄绫夥?abstract?class锛?锛?瀹??ㄤ?瑕???寤轟?涓?浣??版??浜??烘??琛?涓虹??绫夥?骞朵負璇ョ被澹版???規?锛?浣?涓??藉?ㄨ?ョ被涓?瀹??拌?ョ被?????點??涓??藉??寤?bstract?绫葷??瀹?渚????惰????浠ュ??寤轟?涓?????锛??剁被????涓?涓??借薄绫夥?骞惰?╁???????蜂?瀛?绫葷??涓?涓?瀹?渚???涓??芥???借薄?????芥?版???借薄?????規???Abstract?绫葷??瀛?绫諱負瀹?浠??剁被涓????????借薄?規???渚?瀹??幫?????瀹?浠?涔????借薄绫諱負??姒????璋ф案???鴻開??姊?妞??锛?姒?婀?褰???娓????姊㈡?借?跺???鴻開缁?搴???妞???/br?/>?ュ?ｏ?interface锛????借薄绫葷????浣????ㄦ?ュ?ｄ腑锛??????規??芥???借薄????澶?缁ф?挎?у????杩?瀹??拌??風???ュ?ｈ???峰????ュ?ｄ腑???????規??芥???借薄??锛?娌℃??涓?涓???绋?搴?浣????ュ?ｅ????浠ュ??涔?static?final???????????ュ?ｇ??瀹??頒?瀛?绫葷?鎬技锛??や?璇ュ???扮被涓??戒??ュ?ｅ??涔?涓?缁ф?胯?涓恒??褰?绫誨???扮?規???ュ?ｆ?訛?瀹?瀹?涔?锛??沖?绋?搴?浣?缁?浜?锛?????杩?绉??ュ?ｇ???規????跺??锛?瀹???浠ュ?ㄥ???頒?璇ユ?ュ?ｇ??绫葷??浠諱?瀵矽薄涓?璋??ㄦ?ュ?ｇ???規????變????借薄绫夥?瀹???璁鎬嬌?ㄦ?ュ?ｅ??浣?涓哄??ㄥ??????绫誨??????甯哥???ㄦ????缂?灏???????寮??ㄥ??浠ヨ漿?㈠?版?ュ?ｇ被????浠??ュ?ｇ被??杞????instanceof?杩?绠?绗???浠ョ?ㄦ?ュ?沖????瀵矽薄??绫繪???????頒??ュ?ｃ??

18??heap??stack??浠?涔??哄????

????涓?绉?绾垮艦????锛??舵坊???????ゅ??绱?????浣?搴??ㄥ??涓?娈靛???????????у??杩????虹???瑰?杩?琛?澶?????

????????涓?涓?缁?????绱?

19??forward???redirect???哄??

forward?????″?ㄨ?鋒?璧?婧?锛????″?ㄧ?存?ヨ?塊???????闆????URL锛????ｄ釜URL????搴???瀹矽?誨??杩??ワ??跺????杩?浜???瀹瑰????缁?娴?瑙????娴?瑙??ㄦ?規??涓??ラ?????″?ㄥ????????瀹規??浠????挎?ョ??锛???浠ュ?????闆????涓?杩??????ョ???闆????

????redirect灏辨?????＄???規???昏?,????涓?涓??舵????,??璇?娴?瑙??ㄩ???闆?昏?鋒??ｄ釜?闆??锛?涓????ヨ?存?瑙??ㄤ??ㄥ????璇鋒??????????伴???拌?鋒?锛???浠?ession,request???伴?藉??浠ヨ?峰?????

锛?浣??????ユ?版???跺????瑕?璁闆???椤圭??????椤瑰?沖??锛???浠ユ???ラ??搴??蹇???

20??EJB涓?JAVA?BEAN???哄??锛?

Java?Bean?????澶??ㄧ??缁?浠訛?瀵?ava?Bean骞舵病??涓ユ?肩??瑙???锛???璁轟?璁詫?浠諱?涓?涓?Java绫婚?藉??浠ユ??涓?涓?Bean??浣???甯告???典?锛??變?Java?Bean??琚?瀹瑰?ㄦ????寤猴?濡?Tomcat锛???锛???浠?ava?Bean搴??鋒??涓?涓?????????????????锛???甯?ava?Bean杩?瑕?瀹???erializable?ュ?ｇ?ㄤ?瀹???ean????涔??с??Java?Bean瀹???涓??稿?浜?寰?杞?COM妯″??涓??????拌?绋???COM缁?浠訛?瀹???涓??借?璺ㄨ?绋?璁塊??????Enterprise?Java?Bean??稿?浜?DCOM锛??沖??甯?寮?缁?浠躲??瀹????轟?Java??杩?绋??規?璋????RMI锛???????锛???浠?JB??浠ヨ?杩?绋?璁塊??锛?璺ㄨ?绋???璺ㄨ?＄???猴???浣?EJB蹇?椤昏?甯?缃插?ㄨ?稿?Webspere??WebLogic杩??風??瀹瑰?ㄤ腑锛?EJB瀹㈡?蜂?涓??存?ヨ?塊????姝ｇ??EJB缁?浠訛???????杩??跺?瑰?ㄨ?塊????EJB瀹瑰?ㄦ??EJB缁?浠剁??浠ｇ??锛?EJB缁?浠剁?卞?瑰?ㄦ????寤哄??绠＄????瀹㈡?烽??杩?瀹瑰?ㄦ?ヨ?塊????姝ｇ??EJB缁?浠躲??

[b/]21??Static?Nested?Class????Inner?Class??涓??????

????Static?Nested?Class??琚?澹版??涓洪????锛?static锛??????ㄧ被锛?瀹???浠ヤ?渚?璧?浜?澶??ㄧ被瀹?渚?琚?瀹?渚?????????甯哥?????ㄧ被??瑕??ㄥ??ㄧ被瀹?渚????????藉??渚?????

22??JSP涓??ㄦ??INCLUDE涓?????INCLUDE???哄??锛?

?ㄦ??INCLUDE??sp:include?ㄤ?瀹??奧?<jsp:include?page="included.jsp"?flush="true"?/>瀹??繪??浼?妫??ユ??????浠朵腑??????锛??????ㄤ??????ㄦ??椤甸???骞朵???浠ュ甫???般??

????INCLUDE??nclude浼???瀹???瀹?涓?浼?妫??ユ??????浠剁??????锛????ㄤ?????????椤甸??lt;%@?include?file="included.htm"?%>?

23??浠?涔??跺????ssert???

????assertion(??瑷?)?ㄨ蔣浠跺???涓???涓?绉?甯哥?ㄧ??璋?璇??瑰?锛?寰?澶?寮???璇?瑷?涓??芥????杩?绉??哄?躲???ㄥ???頒腑锛?assertion灏辨???ㄧ?搴?涓???涓??¤???ワ?瀹?瀵逛?涓?boolean琛ㄨ揪寮?杩?琛?妫??ワ?涓?涓?姝ｇ‘绋?搴?蹇?椤諱?璇?杩?涓?boolean琛ㄨ揪寮????間負true锛?濡???璇ュ?間負false锛?璇存??绋?搴?宸茬?澶?浜?涓?姝ｇ‘???舵??涓?锛?绯葷?灏?缁??鴻?????????恒??涓????ヨ?達?assertion?ㄤ?淇?璇?绋?搴????烘?????抽????姝ｇ‘?с??assertion妫??ラ??甯稿?ㄥ?????娴?璇??跺?????涓轟???楂??ц?斤??ㄨ蔣浠跺??甯???锛?assertion妫??ラ??甯告???抽??????

24??GC??浠?涔???涓轟?涔?瑕???GC??

????GC?????炬?堕????????锛?Gabage?Collection锛?,??瀛?澶?????缂?绋?浜哄??瀹規???虹?伴??棰????版?癸?蹇?璁版??????璇?????瀛????朵?瀵艱?寸?搴???绯葷???涓?绋沖?????沖穿婧?锛?Java??渚???GC???藉??浠ヨ???ㄧ??娴?瀵矽薄?????杩?浣??ㄥ??浠???杈懼?拌???ㄥ???跺??瀛???????锛?Java璇?瑷?娌℃????渚????懼凡??????瀛????劇ず??浣??規???

?

25??short?s1?=?1;?s1?=?s1?+?1;??浠?涔?????short?s1?=?1;?s1?+=?1;??浠?涔?????

????short?s1?=?1;?s1?=?s1?+?1;?锛?s1+1杩?绠?缁?????int??锛???瑕?寮哄?惰漿?㈢被??锛?

short?s1?=?1;?s1?+=?1;锛???浠ユ?ｇ‘缂?璇?锛?

26??Math.round(11.5)绛??煎?灏???Math.round(-11.5)绛??煎?灏???

????Math.round(11.5)==12

Math.round(-11.5)==-11

round?規?杩???涓????版???ヨ????挎?存?幫????闆??1/2??姹???loor.

27??String?s?=?new?String("xyz");??寤轟???涓?String?Object??

????涓や釜

28??璁捐??涓?绾跨?锛??朵腑涓や釜绾跨?姣?娆″??澧???1锛????涓や釜绾跨?瀵?姣?娆″??灏?1?????虹?搴???

浠ヤ?绋?搴?浣跨?ㄥ???ㄧ被瀹??扮嚎绋?锛?瀵?澧??????跺??娌℃??????椤哄???棰???

public?class?ThreadTest1{

??private?int?j;

??public?static?void?main(String?args[]){

ThreadTest1?tt=new?ThreadTest1();

Inc?inc=tt.new?Inc();

Dec?dec=tt.new?Dec();

for(int?i=0;i<2;i++){

Thread?t=new?Thread(inc);

t.start();

t=new?Thread(dec);

t.start();

}

}

??private?synchronized?void?inc(){

j++;

System.out.println(Thread.currentThread().getName()+"-inc:"+j);

??}

??private?synchronized?void?dec(){

j--;

System.out.println(Thread.currentThread().getName()+"-dec:"+j);

??}

??class?Inc?implements?Runnable{

public?void?run(){

for(int?i=0;i<100;i++){

inc();

}

}

??}

??class?Dec?implements?Runnable{

public?void?run(){

for(int?i=0;i<100;i++){

dec();

}

?}

??}

}

29??Java??娌℃??goto?

java涓???淇???瀛?锛??闆?ㄦ病????ava涓?浣跨?ㄣ??

30?????ㄤ?涓?绾跨?????un()杩???start()?

???ㄤ?涓?绾跨???璋???tart()?規?锛?浣跨嚎绋???浠ｈ〃??????澶????哄?浜???杩?琛??舵??锛?杩????崇??瀹???浠ョ??VM璋?搴?苟?ц???杩?骞朵????崇??绾跨?灏變?绔??寵?琛???run()?規???浠ヤ駭??蹇?椤婚???虹????蹇??ュ??姝??涓?绾跨???

31??EJB????锛?SessionBean,EntityBean锛?璇村?轟?浠??????藉?ㄦ??锛???濡?浣?绠＄??浜??＄??锛?

SessionBean锛?Stateless?Session?Bean??????藉?ㄦ?????卞?瑰?ㄥ?沖????锛?褰?瀹㈡?鋒?哄???鴻?鋒?瑕?寤虹??涓?涓?Bean??瀹?渚??訛?EJB瀹瑰?ㄤ?涓?瀹?瑕???寤轟?涓??扮??Bean??瀹?渚?渚?瀹㈡?鋒?鴻??????????渚挎?句?涓??版????瀹?渚???渚?缁?瀹㈡?鋒?恒??褰?瀹㈡?鋒?虹??涓?娆¤??ㄤ?涓?Stateful?Session?Bean??訛?瀹瑰?ㄥ?椤葷???沖?ㄦ???″?ㄤ腑??寤轟?涓??扮??Bean瀹?渚?锛?骞跺?寵???闆?㈡?鋒?轟?锛?浠ュ??姝ゅ?㈡?鋒?鴻???tateful?Session?Bean????規??跺?瑰?ㄤ???璋??ㄥ??娲懼?頒?姝ゅ?㈡?鋒?虹?稿?寵????Bean瀹?渚???

EntityBean锛?Entity?Beans?藉??娲葷?稿?矽??跨???堕?達?骞朵??舵??????缁???????瑕??版??搴?涓????版??瀛????Entity?beans灏變??村??娲彙????涓??????у??ㄧ?搴????????¤?绋??ヨ?寸?????充嬌EJB瀹瑰?ㄥ穿婧?浜?锛?Entity?beans涔???瀛?娲葷????Entity?Beans???藉?ㄦ???藉?琚?瀹瑰?ㄦ?????Beans??宸辯?＄????

EJB??杩?浠ヤ?????绠＄??瀹??★?瀵矽薄绠＄??缁?缁?锛?OMG锛???瀵矽薄瀹??℃???★?OTS锛?锛?Sun?Microsystems??Transaction?Service锛?JTS锛???Java?Transaction?API锛?JTA锛?锛?寮???缁?锛?X/Open锛???XA?ュ?ｃ??

32??搴??ㄦ???″?ㄦ???ｄ?锛?

BEA?WebLogic?Server锛?IBM?WebSphere?Application?Server锛?Oracle9i?Application?Server锛?jBoss锛?Tomcat

33??缁???涓?涓?浣???甯歌??扮??runtime?exception??

ArithmeticException,?ArrayStoreException,?BufferOverflowException,?BufferUnderflowException,?CannotRedoException,?CannotUndoException,?ClassCastException,?CMMException,?ConcurrentModificationException,?DOMException,?EmptyStackException,?IllegalArgumentException,?IllegalMonitorStateException,?IllegalPathStateException,?IllegalStateException,?ImagingOpException,?IndexOutOfBoundsException,?MissingResourceException,?NegativeArraySizeException,?NoSuchElementException,?NullPointerException,?ProfileDataException,?ProviderException,?RasterFormatException,?SecurityException,?SystemException,?UndeclaredThrowableException,?UnmodifiableSetException,?UnsupportedOperationException

34???ュ?ｆ??????缁ф?挎?ュ????借薄绫繪??????瀹???implements)?ュ????借薄绫繪??????缁ф?垮??浣?绫?concrete?class)?

?ュ?ｅ??浠ョ戶?挎?ュ?ｃ???借薄绫誨??浠ュ????implements)?ュ?ｏ??借薄绫繪??????缁ф?垮??浣?绫夥?浣???????瀹?浣?绫誨?椤繪????纭????????芥?般??

35??List,?Set,?Map????戶?胯??Collection?ュ??

????List锛?Set??锛?Map涓???

36??璇村?烘?版??杩??ユ???宸ヤ??哄?舵??浠?涔??

J2EE???″?ㄥ???ㄦ?朵?寤虹??涓?瀹??伴????姹?杩??ワ?骞朵??寸淮??涓?灏?浜?姝ゆ?扮????姹?杩??ャ??瀹㈡?風??绋?搴???瑕?杩??ユ?訛?姹?椹卞?ㄧ?搴?浼?杩???涓?涓???浣跨?ㄧ??姹?杩??ュ苟灏??惰〃璁頒負蹇???濡???褰???娌℃??绌洪?茶??ワ?姹?椹卞?ㄧ?搴?灏辨?闆緩涓?瀹??伴????杩??ワ??闆緩杩??ョ???伴??????缃????闆?沖????褰?浣跨?ㄧ??姹?杩??ヨ??ㄥ??????锛?姹?椹卞?ㄧ?搴?灏?姝よ??ヨ〃璁頒負绌洪?詫??朵?璋??ㄥ氨??浠ヤ嬌?ㄨ?涓?杩??ャ??

37??abstract??method?????????舵??static,?????????舵??native锛??????????舵??synchronized?

?????戒???

38???扮???娌℃??length()杩?涓??規???String??娌℃??length()杩?涓??規?锛?

?扮?娌℃??length()杩?涓??規?锛???length??灞??с??String????length()杩?涓??規???

39??Set??????绱???涓??介??澶???锛??ｄ??ㄤ?涔??規??ュ?哄????澶?涓??????????=杩???equals()??瀹?浠???浣??哄???

Set??????绱???涓??介??澶???锛??ｄ???terator()?規??ュ?哄????澶?涓?????equals()???よ?諱袱涓?Set?????哥????

????equals()??==?規??沖??寮??ㄥ?兼??????????涓?瀵矽薄equals()?ㄧ被涓?琚?瑕???锛?涓虹????褰?涓や釜??绂葷??瀵矽薄????瀹瑰??绫誨???擱????璇?锛?杩??????箋??

40????????onstructor??????琚?override?

??????onstructor涓??借?缁ф?匡???姝や??介????Overriding锛?浣???浠ヨ???杞?verloading??

41????????浠ョ戶??tring绫?

String绫繪??final绫繪??涓???浠ョ戶?褲??

42??swtich?????戒??ㄥ??yte涓?锛??????戒??ㄥ??ong涓?锛??????戒??ㄥ??tring涓??

switch锛?expr1锛?涓?锛?expr1??涓?涓??存?拌〃杈懼?????姝や???缁??switch????case?璇??ョ?????闆?璇ユ???int???short???char??????byte??long,string??戒??戒??ㄤ?swtich??

43??try?{}????涓?涓?return璇??ワ??ｄ?绱ц??ㄨ?涓?try????finally?{}????code浼?涓?浼?琚??ц?锛?浠?涔??跺??琚??ц?锛???eturn??杩??????

浼??ц?锛???eturn???ц???

44??缂?绋?棰?:??ㄦ???????????規?绠???涔?浠?绛??煎????

2?<<?3

45??涓や釜瀵矽薄?肩?稿??(x.equals(y)?==?true)锛?浣??村????涓?????hash?code锛?杩??ヨ??瀵逛?瀵?

涓?瀵癸????稿????hash?code??

46??褰?涓?涓?瀵矽薄琚?褰?浣????頒????頒?涓??規???锛?姝ゆ?規????瑰??杩?涓?瀵矽薄??灞??э?骞跺??杩???????????缁???锛??ｄ?杩????闆????間???杩???寮??ㄤ?????

???間?????Java?缂?绋?璇?瑷??????間??????般??褰?涓?涓?瀵矽薄瀹?渚?浣?涓轟?涓????拌?浼????版?規?涓??訛????扮???煎氨??瀵矽?ュ?矽薄??寮??ㄣ??瀵矽薄????瀹瑰??浠ュ?ㄨ?璋??ㄧ???規?涓??瑰??锛?浣?瀵矽薄??寮??ㄦ??姘歌?涓?浼??瑰??????

47??褰?涓?涓?绾跨?杩??ヤ?涓?瀵矽薄??涓?涓?synchronized?規???锛??跺??绾跨???????杩??ユ?ゅ?矽薄???跺???規??

涓??斤?涓?涓?瀵矽薄??涓?涓?synchronized?規????界?變?涓?绾跨?璁塊????

48??缂?绋?棰?:???涓?涓?Singleton?烘?ャ??

Singleton妯″?涓昏?浣??ㄦ??淇?璇???ava搴??ㄧ?搴?涓?锛?涓?涓?绫?lass????涓?涓?瀹?渚?瀛??ㄣ??

涓???Singleton妯″???甯告????绉?绉?褰㈠?:

绗?涓?绉?褰㈠?:?瀹?涔?涓?涓?绫夥?瀹????????芥?頒負private??锛?瀹???涓?涓?static??private??璇ョ被????锛??ㄧ被??濮????跺??渚?璇?锛???杩?涓?涓?public??getInstance?規??峰??瀵瑰????寮???缁ц??璋??ㄥ?朵腑???規???

public?class?Singleton?{

private?Singleton(){}

????????file://?ㄨ??宸卞???ㄥ??涔???宸變?涓?瀹?渚?锛???涓???寰?濂???锛?

????????file://娉ㄦ??杩???private???渚????ㄨ???

????????private?static?Singleton?instance?=?new?Singleton();

????????file://杩?????渚?浜?涓?涓?渚?澶??ㄨ?塊????class???????規?锛???浠ョ?存?ヨ?塊??????

????????public?static?Singleton?getInstance()?{

????????????return?instance;?????

????????}?

????}?

????绗?浜?绉?褰㈠?:?

public?class?Singleton?{?

????private?static?Singleton?instance?=?null;

????public?static?synchronized?Singleton?getInstance()?{

????file://杩?涓??規?姣?涓??㈡?????矽?锛?涓??ㄦ??娆￠?借?琛?????瀵矽薄锛?????绗?涓?娆°?????????

????file://浣跨?ㄦ?剁????瀹?渚?锛???楂?浜?????锛?

????if?(instance==null)

????????instance锛?new?Singleton();

return?instance;?????}?

}?

?朵?褰㈠?:

瀹?涔?涓?涓?绫夥?瀹????????芥?頒負private??锛??????規?涓?tatic????

涓???璁や負绗?涓?绉?褰㈠?瑕??村??瀹??ㄤ??

49??Java???ュ?ｅ??C++????绫葷???稿????涓???澶???

?變?Java涓?????澶?缁ф?匡????????芥??涓?绫繪??瀵矽薄瑕?浣跨?ㄥ?????ㄥ??涓?绫繪??瀵矽薄???㈢???規???灞??э??版??????缁ф?挎?哄?跺氨涓??芥弧瓒寵?姹???涓?缁ф?跨?告??锛??ュ?ｆ???撮?????墊椿?э???涓烘?ュ?ｄ腑娌℃??浠諱?瀹??頒唬????褰?涓?涓?绫誨???頒??ュ?ｄ互??锛?璇ョ被瑕?瀹??版?ュ?ｉ???㈡???????規???灞??э?骞朵??ュ?ｉ???㈢??灞??у?ㄩ?璁ょ?舵??涓??㈤?芥??public?static,?????規?榛?璁ゆ???典???public.涓?涓?绫誨??浠ュ???闆?涓??ュ?ｃ??

50??Java涓???寮?甯稿????哄?剁??绠?????????搴??ㄣ??

褰?JAVA绋?搴?杩???浜?JAVA??璇?涔?瑙????訛?JAVA?????哄氨浼?灏?????????璇?琛ㄧず涓轟?涓?寮?甯搞??杩???璇?涔?瑙???????2绉????點??涓?绉???JAVA绫誨???缃???璇?涔?妫??ャ??渚?濡??扮?涓???瓒???,浼?寮???IndexOutOfBoundsException;璁塊??null??瀵矽薄?朵?寮???NullPointerException?????绉????靛氨??JAVA??璁哥?搴????╁?杩?绉?璇?涔?妫??ワ?绋?搴?????浠ュ??寤鴻??宸辯??寮?甯革?骞惰???遍???╁?ㄤ??剁??hrow?抽??瀛?寮???寮?甯搞????????寮?甯擱?芥??java.lang.Thowable??瀛?绫彙??

51?????懼???剁??浼??瑰????????骞惰????2绉????舵?哄?躲??

Java璇?瑷?涓?涓?涓??捐?????圭?瑰氨??寮??ヤ????懼???舵?哄?訛?浣?++绋?搴?????澶寸?肩????瀛?绠＄??????棰?杩?????瑙ｏ?瀹?浣垮?Java绋?搴????ㄧ???绋?搴????跺??涓?????瑕???????瀛?绠＄?????變???涓????懼???舵?哄?訛?Java涓???瀵矽薄涓?????"浣??ㄥ??"??姒?蹇碉?????瀵矽薄??寮??ㄦ????"浣??ㄥ??"?????懼???跺??浠ユ???????叉?㈠??瀛?娉??詫???????浣跨?ㄥ??浠ヤ嬌?ㄧ????瀛??????懼???跺?ㄩ??甯告??浣?涓轟?涓???????浣?绾у????绾跨?杩?琛?锛?涓???棰??ョ?????典?瀵瑰??瀛???涓?宸茬?姝諱骸???????挎?堕?存病??浣跨?ㄧ??瀵矽薄杩?琛?娓?妤??????訛?绋?搴???涓??藉???剁??璋??ㄥ???懼???跺?ㄥ?規??涓?瀵矽薄??????瀵矽薄杩?琛????懼???躲?????舵?哄?舵????浠ｅ??跺???懼???跺????璁闆???懼???訛?澧??????懼???躲??

[????????]???璐村?闆??锛? http://club.it.sohu.com/r-javalang-5140-0-15-0.html?

?

?

??涓婚?锛?java?稿?沖?虹??ヨ??锛???缃?椤??ユ??浜?0澶у????琛?涓郝??

?

?

52??璇瘋?村?轟????ラ????绾跨???姝ョ???規???

wait():浣誇?涓?绾跨?澶?浜?绛?寰??舵??锛?骞朵????炬????????瀵矽薄??lock??

sleep():浣誇?涓?姝ｅ?ㄨ?琛???绾跨?澶?浜??＄???舵??锛???涓?涓??????規?锛?璋??ㄦ?ゆ?規?瑕?????InterruptedException寮?甯搞??

notify():?ら??涓?涓?澶?浜?绛?寰??舵????绾跨?锛?娉ㄦ???????ㄨ??ㄦ?ゆ?規????跺??锛?骞朵??界‘?????ら????涓?涓?绛?寰??舵????绾跨?锛???????VM纭?瀹??ら????涓?绾跨?锛???涓?涓?????浼???绾с??

Allnotity():?ら??????澶??ョ??寰??舵????绾跨?锛?娉ㄦ??骞朵???缁??????ら??绾跨?涓?涓?瀵矽薄????锛?????璁╁??浠?绔?浜???

??

53??浣????ラ????????绫婚?芥????浜?锛?涓昏??規?锛?

??甯哥?ㄧ??????绫繪???List????Map???List????蜂?瀹??闆?????ArrayList????Vector锛?瀹?浠???????澶у?????琛??姣?杈???????寤恒??瀛??ㄥ????浣?浠諱?绫誨??瀵矽薄????绱???琛ㄣ???List????ㄤ????闆?肩儲寮?璁塊????绱?????褰????

Map???渚?浜?涓?涓??撮???ㄧ????绱?瀛??ㄦ?規????Map?????绫葷?ㄤ?瀛??ㄥ??绱?瀵癸?绉頒?"??"??"??锛?锛??朵腑姣?涓?????灏??頒?涓??箋??

54????杩頒?涓?JVM??杞?lass??浠剁???????哄??

JVM涓?绫葷??瑁?杞芥????lassLoader??瀹???瀛?绫繪?ュ???扮??,Java?ClassLoader???涓?涓???瑕???Java杩?琛??剁郴缁?缁?浠躲??瀹?璐?璐ｅ?ㄨ?琛??舵?ユ?懼??瑁??ョ被??浠剁??绫彙??

????

?

55??char??????涓??戒??藉??璐?涓?涓?涓???姹?瀛??涓轟?涔???

?藉?瀹?涔???涓轟?涓?涓?????锛???涓?ava涓?浠?nicode缂???锛?涓?涓?char??16涓?瀛???锛???浠ユ?句?涓?涓?????娌￠??棰???

56??澶?绾跨?????绉?瀹??版?規?,?芥??浠?涔????姝ユ????绉?瀹??版?規?,?芥??浠?涔???

澶?绾跨???涓ょ?瀹??版?規?锛???????缁ф??hread绫諱?瀹???unnable?ュ?Ｂ?

??姝ョ??瀹??版?歸?㈡??涓ょ?锛???????synchronized,wait涓?notify

?

???

58??绾跨????烘??姒?蹇點??绾跨????烘???舵??浠ュ???舵??涔??寸???崇郴

绾跨????ㄧ?搴??ц?杩?绋?涓?锛??藉??ц?绋?搴?浠ｇ????涓?涓??ц???浣?锛?姣?涓?绋?搴??沖??芥??涓?涓?绾跨?锛?涔?灏辨??绋?搴???韬???

Java涓???绾跨?????绉??舵????????锛?杩?琛???灏辯華????璧楓??缁??????

59??JSP??甯哥?ㄦ??浠?

<%@page?language="java"?contenType="text/html;charset=gb2312"?session="true"?buffer="64kb"?autoFlush="true"?isThreadSafe="true"?info="text"?errorPage="error.jsp"?isErrorPage="true"?isELIgnored="true"?pageEncoding="gb2312"?import="java.sql.*"%>

isErrorPage(?????戒嬌??xception瀵矽薄)锛?isELIgnored(????拷?ヨ〃杈懼?)

<%@include?file="filename"%>

<%@taglib?prefix="c"uri="http://......"%>

60??浠?涔????典?璋???oGet()??doPost()锛?

Jsp椤甸??腑??form??绛鵑????method灞??т負get?惰???oGet()锛?涓?ost?惰???oPost()???

61??servlet?????藉?ㄦ??

web瀹瑰?ㄥ??杞?ervlet锛????藉?ㄦ??寮?濮?????杩?璋???ervlet??init()?規?杩?琛?servlet????濮???????杩?璋???ervice()?規?瀹??幫??規??璇鋒???涓???璋??ㄤ?????do***()?規???缁??????★?web瀹瑰?ㄨ???ervlet??destroy()?規???

62??濡?浣??闆??servlet????绾跨?妯″?

<%@?page?isThreadSafe="false"%>

63??椤甸?㈤?村?矽薄浼??????規?

request锛?session锛?application锛?cookie绛?

64??JSP??Servlet????浜??稿???瑰??涓????癸?浠?浠?涔??寸????绯繪??浠?涔?锛??

JSP??Servlet???????╁?锛???璐ㄤ???Servlet??绠????瑰?锛??村己璋?搴??ㄧ??澶?琛ㄨ〃杈俱??JSP缂?璇?????"绫?ervlet"??Servlet??JSP??涓昏???涓????瑰?ㄤ?锛?Servlet??搴??ㄩ?昏?????ava??浠朵腑锛?骞朵?瀹??ㄤ?琛ㄧず灞?涓???HTML????绂誨??ャ????JSP?????墊??Java??HTML??浠ョ?????涓?涓??╁???涓?jsp????浠躲??JSP渚ч??浜?瑙??撅?Servlet涓昏??ㄤ??у?堕?昏???

65????绉?浼?璇?璺?韪?????

浼?璇?浣??ㄥ??ServletsJSP?椤甸?㈡??杩?

page????浠ｈ〃涓?涓?涓?椤甸?㈢?稿?崇??瀵矽薄??灞??с??涓?涓?椤甸?㈢?變?涓?缂?璇?濂界???Java?servlet?绫夥???浠ュ甫??浠諱????include???浠わ?浣???娌℃???include??ㄤ?锛?琛ㄧず??杩??㈠?????servlet???????琚?缂?璇????servlet????JSP?椤甸??

request????浠ｈ〃涓??Web?瀹㈡?鋒?哄???虹??涓?涓?璇鋒??稿?崇??瀵矽薄??灞??с??涓?涓?璇鋒????借法瓒?澶?涓?椤甸???娑???澶?涓??Web?缁?浠訛??變??forward???浠ゅ???include??ㄤ????崇郴锛?

session????浠ｈ〃涓??ㄤ???涓??Web?瀹㈡?鋒?虹??涓?涓??ㄦ?蜂?楠??稿?崇??瀵矽薄??灞??с??涓?涓??Web?浼?璇???浠ヤ?缁?甯鎬?璺ㄨ?澶?涓?瀹㈡?鋒?鴻?鋒?

application????浠ｈ〃涓??翠釜?Web?搴??ㄧ?搴??稿?崇??瀵矽薄??灞??с??杩?瀹?璐ㄤ???璺ㄨ??翠釜?Web?搴??ㄧ?搴?锛?????澶?涓?椤甸????璇鋒???浼?璇???涓?涓??ㄥ?浣??ㄥ??

66??Request瀵矽薄??涓昏??規?锛?

setAttribute(String?name,Object)锛?璁劇疆??瀛?涓?ame??request?????闆??

getAttribute(String?name)锛?杩?????ame??瀹???灞??у??

getAttributeNames()锛?杩???request瀵矽薄????灞??х????瀛?????锛?缁?????涓?涓???涓劇??瀹?渚?

getCookies()锛?杩???瀹㈡?風????????Cookie瀵矽薄锛?缁?????涓?涓?Cookie?扮?

getCharacterEncoding()锛?杩???璇鋒?涓???瀛?绗?????瑰?

getContentLength()锛?杩???璇鋒???Body???垮害

getHeader(String?name)锛??峰?HTTP??璁?瀹?涔?????浠跺ご淇℃??

getHeaders(String?name)锛?杩?????瀹???瀛???request?Header???????鹼?缁?????涓?涓???涓劇??瀹?渚?

getHeaderNames()锛?杩?????浠?equest?Header????瀛?锛?缁?????涓?涓???涓劇??瀹?渚?

getInputStream()锛?杩???璇鋒???杈??ユ?锛??ㄤ??峰?璇鋒?涓????版??

getMethod()锛??峰?瀹㈡?風???????″?ㄧ??浼????版?????規?

getParameter(String?name)锛??峰?瀹㈡?風??浼???缁????″?ㄧ??????name??瀹??????闆??

getParameterNames()锛??峰?瀹㈡?風??浼???缁????″?ㄧ???????????扮????瀛?锛?缁?????涓?涓???涓劇??瀹?渚?

getParameterValues(String?name)锛??峰???name??瀹??????扮????????

getProtocol()锛??峰??瀹㈡?風???????″?ㄧ??浼????版????渚???????璁???绉?

getQueryString()锛??峰??ヨ?㈠??绗?覆

getRequestURI()锛??峰?????鴻?鋒?瀛?绗?覆??瀹㈡?風???闆??

getRemoteAddr()锛??峰??瀹㈡?風????IP?闆??

getRemoteHost()锛??峰??瀹㈡?風??????瀛?

getSession([Boolean?create])锛?杩?????璇鋒??稿??ession

getServerName()锛??峰?????″?ㄧ????瀛?

getServletPath()锛??峰??瀹㈡?風????璇鋒?????????浠剁??璺?寰?

getServerPort()锛??峰?????″?ㄧ??绔??ｅ??

removeAttribute(String?name)锛????よ?鋒?涓???涓?涓?灞???

67??J2EE??????杩???骞沖?拌???妗??訛?

????J2EE??韬???涓?涓?????锛?涓?涓?涓轟?涓???甯?寮?搴??ㄧ??寮?????渚???????骞沖?般??

????J2EE涔???涓?涓?妗??訛?????JDBC??JNDI??RMI??JMS??EJB??JTA绛???????

68????浠???eb搴??ㄥ???杩?绋?涓?缁?甯擱???拌??烘??绉?缂?????瀛?绗??濡?iso8859-1绛?锛?濡?浣?杈??轟?涓???绉?缂?????瀛?绗?覆锛?

??Public?String?translate?(String?str)?{

????String?tempStr?=?"";

????try?{

??????tempStr?=?new?String(str.getBytes("ISO-8859-1"),?"GBK");

??????tempStr?=?tempStr.trim();

????}

????catch?(Exception?e)?{

??????System.err.println(e.getMessage());

????}

????return?tempStr;

??}

69??绠?杩伴?昏???浣?(&,|,^)涓??′歡??浣?(&&,||)???哄????

?哄??涓昏?绛?涓ょ?癸?a.?′歡??浣????芥??浣?甯?灏?????,???昏???浣?涓?浠???浠ユ??浣?甯?灏???,??涓???浠ユ??浣??闆?煎??

b.?昏???浣?涓?浼?浜х????璺?

70??XML??妗ｅ??涔?????绉?褰㈠?锛?瀹?浠?涔??存??浣???璐ㄥ?哄??锛?瑙ｆ??XML??妗ｆ??????绉??瑰?锛??

a:?涓ょ?褰㈠??dtd??schema锛?b:???璐ㄥ?哄??:schema??韬???xml??锛???浠ヨ?XML瑙ｆ???ㄨВ??(杩?涔???浠?DTD涓???灞?schema???規??????)锛?c:??DOM,SAX,STAX绛??

????DOM:澶???澶у????浠舵?跺?舵?ц?戒???????甯稿??瀹熾??杩?涓???棰?????OM????缁???????????锛?杩?绉?缁??????ㄧ????瀛?杈?澶?锛???涓?DOM蹇?椤誨?ㄨВ????浠朵??????翠釜??妗ｈ??ュ??瀛?,????瀵?ML?????鴻?塊??

SAX:涓??頒?DOM,SAX??浜?浠堕┍?ㄥ????XML瑙ｆ???瑰???瀹?椤哄?璇誨??XML??浠訛?涓???瑕?涓?娆″?ㄩ?ㄨ?杞芥?翠釜??浠躲??褰????闆????浠跺?澶達???妗ｇ???锛???????绛懼?澶翠???绛劇????訛?瀹?浼?瑙???涓?涓?浜?浠訛??ㄦ?烽??杩??ㄥ?跺??璋?浜?浠朵腑???ュ???浠ｇ???ュ???XML??浠訛?????瀵?ML??椤哄?璁塊???

????STAX:Streaming?API?for?XML?(StAX)

71??绠?杩?ynchronized??java.util.concurrent.locks.Lock??寮????锛?

涓昏??稿???癸?Lock?藉????synchronized??瀹??扮??????????

涓昏?涓????癸?Lock??姣?synchronized?寸簿纭???绾跨?璇?涔????村ソ???ц?姐??synchronized浼????ㄩ???鵑??锛???Lock涓?瀹?瑕?姹?绋?搴?????宸ラ???撅?骞朵?蹇?椤誨??inally浠??ヤ腑???俱??

72??EJB??瑙??插??涓?涓?瀵矽薄

涓?涓?瀹??寸???轟?EJB????甯?寮?璁＄??缁????卞??涓?瑙??茬???锛?杩???涓?瑙??插??浠ョ?變?????寮???????渚?锛?姣?涓?瑙??叉??浣???宸ヤ?蹇?椤婚?靛驚Sun???告??渚???EJB瑙???锛?浠ヤ?璇?褰兼?や??寸???煎?規?с??杩???涓?瑙??插??????EJB缁?浠跺?????锛?Enterprise?Bean?Provider锛????搴??ㄧ?????锛?Application?Assembler锛????ㄧ講??锛?Deployer锛???EJB????″?ㄦ??渚???锛?EJB?Server?Provider锛???EJB?瀹瑰?ㄦ??渚???锛?EJB?Container?Provider锛???绯葷?绠＄????锛?System?Administrator锛?

涓?涓?瀵矽薄??Remote锛?Local锛??ュ?ｃ??Home锛?LocalHome锛??ュ?ｏ?Bean绫?

73??EJB瀹瑰?ㄦ??渚???????

涓昏???渚?澹版???ㄦ??绠＄????浠ｇ??浜х??????缁??х?＄????瀹??ㄣ??浜??＄?＄????????骞跺??琛?绠＄??绛????°??

74??EJB瑙???瑙?瀹?EJB涓?绂?姝㈢????浣?????浜?锛??

????1.涓??芥??浣?绾跨???绾跨?API(绾跨?API????绾跨?瀵矽薄???規?濡?notify,wait绛?)锛?2.涓??芥??浣?awt锛?3.涓??藉???版???″?ㄥ???斤?4.涓??藉?歸????灞???瀛???锛?5.涓??戒嬌??O??浣??存?ュ??????浠剁郴缁?锛?6.涓??藉??杞芥???闆?.锛?7.涓??藉?this浣?涓哄??????杩???锛?8.涓??藉驚??璋??ㄣ??

75??remote?ュ?ｅ??home?ュ?ｄ富瑕?浣???

remote?ュ?ｅ??涔?浜?涓??℃?規?锛??ㄤ?EJB瀹㈡?風??璋??ㄤ??℃?規???

home?ュ?ｆ??EJB宸ュ???ㄤ???寤哄??绉婚?ゆ?ユ??JB瀹?渚?

76??bean?瀹?渚??????藉?ㄦ??

瀵逛?Stateless?Session?Bean??Entity?Bean??Message?Driven?Bean涓???瀛??ㄧ??叉?绠＄??锛???瀵逛?Entity?Bean??Statefull?Session?Bean瀛???ache绠＄??锛???甯稿??????寤哄??渚?锛?璁劇疆涓?涓???????寤?JB?Object锛?create锛???涓??℃?規?璋??ㄣ??remove绛?杩?绋?锛?瀵逛?瀛??ㄧ??叉?绠＄????Bean锛???reate涔???瀹?渚?骞朵?浠???瀛?娓??わ????????ㄧ??叉?璋?搴??哄?朵??????ㄥ??渚?锛???瀵逛?瀛???ache绠＄????Bean????杩?婵?娲誨???繪?娲繪?哄?朵???Bean???舵??骞堕???跺??瀛?涓?瀹?渚??伴????

77??EJB??婵?娲繪?哄??

浠?tateful?Session?Bean?涓轟?锛???ache澶у??沖??浜???瀛?涓???浠ュ???跺???ㄧ??Bean瀹?渚????伴??锛??規??MRU??NRU绠?娉?锛?瀹?渚??ㄦ?娲誨???繪?娲葷?舵??涔??磋?绉夥?婵?娲繪?哄?舵??褰?瀹㈡?風??璋??ㄦ??涓?EJB瀹?渚?涓??℃?規??訛?濡???瀵瑰?EJB?Object???拌??宸辨病??缁?瀹?瀵瑰???Bean瀹?渚???浠??跺?繪?娲?ean瀛??ㄤ腑锛???杩?搴??????哄?跺???ㄥ??渚?锛???澶?锛?婵?娲夥?姝ゅ??渚????舵????杩???浼?璋??ㄥ?瑰???ejbActive??ejbPassivate?規???

78??EJB????绉?绫誨??

浼?璇?锛?Session锛?Bean?锛?瀹?浣?锛?Entity锛?Bean?娑???椹卞?ㄧ??锛?Message?Driven锛?Bean

浼?璇?Bean??????涓烘???舵??锛?Stateful锛??????舵??锛?Stateless锛?涓ょ?

瀹?浣?Bean????涓?ean绠＄??????缁??э?BMP锛???瀹瑰?ㄧ?＄??????缁??э?CMP锛?涓ょ?

79??瀹㈡??绔?璋???JB瀵矽薄????涓??烘??姝ラ??

璁劇疆JNDI???″伐??浠ュ??JNDI???″?闆??绯葷?灞??э??ユ??ome?ュ?ｏ?浠?Home?ュ?ｈ???reate?規???寤?emote?ュ?ｏ???杩?Remote?ュ?ｈ??ㄥ?朵??℃?規???

80??濡?浣?缁?weblogic??瀹?澶у?????瀛???

?ㄥ????eblogic??????涓?锛?浣?浜?????omian瀵瑰????″?ㄧ??褰?涓???startServerName锛?锛?澧???set?MEM_ARGS=-Xms32m?-Xmx200m锛???浠ヨ??存??灏???瀛?涓?2M锛???澶?00M

?

81??濡?浣?璁懼????weblogic???????ㄦā寮?(寮???妯″?)涓?浜у????甯?妯″??

??浠ュ?ㄧ?＄???у?跺?頒腑淇??瑰?瑰????″?ㄧ?????ㄦā寮?涓哄?????浜у??妯″?涔?涓???????淇??規???＄?????ㄦ??浠舵????commenv??浠訛?澧???set?PRODUCTION_MODE=true??

82??濡?浣????ㄦ?朵???杈??ョ?ㄦ?峰??涓?瀵????

淇??規???″???ㄦ??浠訛?澧????WLS_USER??WLS_PW椤廣??涔???浠ュ??oot.properties??浠朵腑澧?????瀵?杩????ㄦ?峰????瀵???.

83????eblogic绠＄???跺?頒腑瀵逛?涓?搴??ㄥ??(????璇存??涓?涓?缃?绔?,Domain)杩?琛?jms??ejb??杩??ユ?绛??稿?充俊??杩?琛???缃???,瀹???淇?瀛??ㄤ?涔???浠朵腑?

淇?瀛??ㄦ??omain??config.xml??浠朵腑锛?瀹??????″?ㄧ???稿???缃???浠躲??

84??璇磋??eblogic涓?涓?涓?Domain??缂虹????褰?缁????姣?濡?瑕?灏?涓?涓?绠?????helloWorld.jsp?懼?ヤ???褰?涓?,?剁???ㄦ?瑙??ㄤ?灏卞??????ttp://涓繪??绔??ｅ??/helloword.jsp灏卞??浠ョ???拌?琛?缁???浜?????姣?濡?杩??朵腑?ㄥ?頒?涓?涓???宸卞????javaBean璇ュ?浣????

Domain??褰????″?ㄧ??褰?applications锛?灏?搴??ㄧ??褰??懼?ㄦ?ょ??褰?涓?灏???浠ヤ?涓哄??ㄨ?塊??锛?濡?????Web搴????搴??ㄧ??褰???瑕?婊¤凍Web搴??ㄧ??褰?瑕?姹?锛?jsp??浠跺??浠ョ?存?ユ?懼?ㄥ??ㄧ??褰?涓?锛?Javabean??瑕??懼?ㄥ??ㄧ??褰???WEB-INF??褰???classes??褰?涓?锛?璁劇疆???″?ㄧ??缂虹??搴??ㄥ???浠ュ???闆?ㄦ?瑙??ㄤ?????杈??ュ??ㄥ????

85????eblogic涓???甯?ejb??娑????闆??浜???缃???浠?

涓???绫誨????EJB娑???????缃???浠朵???锛??芥????扮????缃???浠跺????ejb-jar.xml,weblogic-ejb-jar.xmlCMP瀹?浣?Bean涓???杩???瑕?weblogic-cmp-rdbms-jar.xml?

86??濡?浣???eblogic涓?杩?琛?ssl??缃?涓?瀹㈡?風????璁よ????缃???璇磋??2ee(????)杩?琛?ssl????缃?

缂虹??瀹?瑁?涓?浣跨??emoIdentity.jks??DemoTrust.jks??KeyStore瀹???SL锛???瑕???缃????″?ㄤ嬌??nable?SSL锛???缃??剁???ｏ??ㄤ駭??妯″?涓???瑕?浠?CA?峰??绉???瀵??ュ???闆??璇?涔????寤?dentity??trust?keystore锛?瑁?杞借?峰???瀵??ュ???闆??璇?涔?????浠ラ??缃?姝?SL杩??ユ??????杩???????????

87??濡?浣??ョ????eblogic涓?宸茬???甯???EJB?

??浠ヤ嬌?ㄧ?＄???у?跺?幫??ㄥ????Deployment涓???浠ユ?ョ??????宸插??甯???EJB

88??CORBA??浠?涔???ㄩ????浠?涔???

CORBA??????????卞?矽薄璇鋒?浠ｇ??缁???(Common?Object?Request?Broker?Architecture)锛??卞?矽薄绠＄??缁?缁??(Object?Management?Group锛?缂╁??涓郝?OMG)????????瀹???缁??????ュ?ｅ??涔?璇?瑷?(IDL),?璇?瑷?缁?瀹?(binding:涔?璇?涓鴻??缂?)????璁稿??ㄧ?搴??翠???浣?????璁?????剁????涓猴??ㄤ?????绋?搴?璁捐?¤??瑷?涔????ㄤ?????杩?绋?涓?杩?琛?锛?涓轟???????浣?绯葷?寮?????

89??璇磋?翠???????????璇磋???j2ee涓?????绉?甯哥?ㄦā寮????瀵矽?捐?℃ā寮???涓?浜???娉?

??Session?Facade?Pattern锛?浣跨??essionBean璁塊??EntityBean

Message?Facade?Pattern锛?瀹??闆?姝ヨ???

EJB?Command?Pattern锛?浣跨??ommand?JavaBeans??浠?essionBean锛?瀹??拌交??绾ц?塊??

Data?Transfer?Object?Factory锛???杩?DTO?Factory绠???EntityBean?版????渚??規??

Generic?Attribute?Access锛???杩?AttibuteAccess?ュ?ｇ????EntityBean?版????渚??規??

Business?Interface锛???杩?杩?绋?锛????幫??ュ?ｅ??Bean绫誨???扮?稿???ュ?ｈ???涓??￠?昏?涓??存??

锛ワ吉锛㈡?舵????璁捐?″ソ??灏??存?ュ獎??绯葷????ц?姐?????╁??с????缁存?ゆ?с??缁?浠跺?????ㄦ?у??寮?????????椤圭??瓒?澶???锛?椤圭????浼?瓒?搴?澶у??瓒??戒??拌??濂借?捐?＄????瑕??с??

90??璇磋?村??eblogic涓?寮???娑???Bean?剁??persistent涓?non-persisten??宸???

persistent?瑰???MDB??浠ヤ?璇?娑???浼???????????涔?灏辨??濡???EJB瀹瑰?ㄥ?虹?伴??棰???JMS???″?ㄤ??朵?灏?娑????ㄦ??DB???ㄧ???跺??????杩??ワ???non锛?persistent?瑰???娑???灏?琚?涓㈠???

?

91??Servlet?ц??朵???瀹??闆????涓??規?锛?

public?void?init(ServletConfig?config)

public?ServletConfig?getServletConfig()

public?String?getServletInfo()

public?void?service(ServletRequest?request,ServletResponse?response)

public?void?destroy()

92??j2ee甯哥?ㄧ??璁捐?℃ā寮?锛?璇存??宸ュ??妯″???

????Java涓???23绉?璁捐?℃ā寮?锛?

Factory锛?宸ュ??妯″?锛?锛???????Builder锛?寤洪??妯″?锛?锛????????Factory?Method锛?宸ュ???規?妯″?锛?锛?

Prototype锛???濮?妯″??妯″?锛?锛?Singleton锛???渚?妯″?锛?锛?????Facade锛??ㄩ?㈡ā寮?锛?锛?

Adapter锛??????ㄦā寮?锛?锛?????Bridge锛?妗ユ?妯″?锛?锛?????????Composite锛?????妯″?锛?锛?

Decorator锛?瑁?楗版ā寮?锛?锛?????Flyweight锛?浜???妯″?锛?锛??????Proxy锛?浠ｇ??妯″?锛?锛?

Command锛??戒護妯″?锛?锛???????Interpreter锛?瑙ｉ???ㄦā寮?锛?锛??Visitor锛?璁塊????妯″?锛?锛?

Iterator锛?杩?浠ｅ??妯″?锛?锛????Mediator锛?璋?????妯″?锛?锛?????Memento锛?澶?蹇?褰?妯″?锛?锛?

Observer锛?瑙?瀵???妯″?锛?锛????State锛??舵??妯″?锛?锛??????????Strategy锛?绛??ユā寮?锛?锛?

Template?Method锛?妯℃?挎?規?妯″?锛?锛??Chain?Of?Responsibleity锛?璐ｄ換?炬ā寮?锛?

宸ュ??妯″?锛?宸ュ??妯″???涓?绉?缁?甯歌?浣跨?ㄥ?扮??妯″?锛??規??宸ュ??妯″?瀹??扮??绫誨??浠ユ?規????渚????版??????涓?缁?绫諱腑??涓?涓?绫葷??瀹?渚?锛???甯歌?涓?缁?绫繪??涓?涓????辯???借薄?剁被骞朵?瀹??頒??稿?????規?锛?浣???杩?浜??規???瀵逛??????版??杩?琛?浜?涓???????浣???棣?????瑕?瀹?涔?涓?涓??虹被锛?璇ョ被??瀛?绫婚??杩?涓??????規?瀹??頒??虹被涓????規????跺????瑕?瀹?涔?涓?涓?宸ュ??绫夥?宸ュ??绫誨??浠ユ?規???′歡????涓?????瀛?绫誨??渚???褰?寰??闆??绫葷??瀹?渚???锛?寮???浜哄????浠ヨ??ㄥ?虹被涓????規???涓?蹇??????闆?杩?????????涓?涓?瀛?绫葷??瀹?渚???

93??EJB???存?ュ???闆????涓??℃?ュ?ｆ??Home?ュ?ｅ??锛?璇風??杩扮???便??

杩?绋??ュ?ｅ??Home?ュ?ｄ???瑕??存?ュ???幫?浠?浠???瀹??頒唬?????辨???″?ㄤ駭????锛?绋?搴?杩?琛?涓?瀵瑰?瀹??扮被浼?浣?涓哄?瑰??ュ?ｇ被????瀹?渚?琚?浣跨?ㄣ??

94????搴??芥??????绉??規?锛?璇峰??涓俱????AVA瀹??頒?涓?蹇?????搴???

??????搴????規???锛????ユ??搴?锛??存?ユ???ユ??搴???甯?灏???搴?锛?锛?浜ゆ?㈡??搴?锛???娉℃??搴???蹇?????搴?锛?锛????╂??搴?锛??存?ラ???╂??搴???????搴?锛?锛?褰?骞舵??搴?锛???????搴?锛?绠辨??搴????烘?版??搴?锛?

蹇?????搴???浼?浠ｇ????

/?/浣跨?ㄥ揩????搴??規?瀵?[?0?:n-?1?]??搴?

浠?a[?0?:n-?1?]涓????╀?涓???绱?浣?涓??i?d?d?l?e锛?璇ュ??绱?涓烘????

??浣?涓?????绱????蹭負涓ゆ??eft???r?i?g?h?t锛?浣垮?l?e?f?t涓?????绱??藉?浜?绛?浜????癸???right?涓?????绱??藉ぇ浜?绛?浜?????

??褰??頒嬌?ㄥ揩????搴??規?瀵?eft?杩?琛???搴?

??褰??頒嬌?ㄥ揩????搴??規?瀵?ight?杩?琛???搴?

??寰?缁???涓??e?f?t?+?m?i?d?d?l?e?+?r?i?g?h?t

95??璇峰?逛互涓???2EE涓?甯哥?ㄧ????璇?杩?琛?瑙ｉ??(??绠?????杩?

web瀹瑰???缁?澶?浜??朵腑??搴??ㄧ?搴?缁?浠訛?JSP锛?SERVLET锛???渚?涓?涓???澧?锛?浣?SP,SERVLET?存?ユ?村?瑰?ㄤ腑????澧??????ュ?ｄ氦浜?锛?涓?蹇??蟲敞?跺??绯葷???棰???涓昏???WEB???″?ㄦ?ュ???般??渚?濡?锛?TOMCAT,WEBLOGIC,WEBSPHERE绛???璇ュ?瑰?ㄦ??渚????ュ?ｄ弗?奸?靛??J2EE瑙???涓???WEB?APPLICATION?????????浠????靛??浠ヤ???????WEB???″?ㄥ氨????J2EE涓???WEB瀹瑰?ㄣ??

EJB瀹瑰???Enterprise?java?bean?瀹瑰?ㄣ???村?鋒??琛?涓?棰????矽?層??浠???渚?缁?杩?琛??ㄥ?朵腑??缁?浠?JB??绉?绠＄?????姐????瑕?婊¤凍J2EE瑙?????EJB?懼?ヨ?ュ?瑰???椹?涓?灏變?琚?瀹瑰?ㄨ?琛?楂???????绠＄????骞朵???浠ラ??杩??版?????ュ?ｆ?ヨ?峰?绯葷?绾у???????°??渚?濡???浠舵???°??浜??＄?＄????

JNDI锛?锛?Java?Naming?&?Directory?Interface锛?JAVA?藉????褰????°??涓昏???渚??????芥??锛???渚?涓?涓???褰?绯葷?锛?璁╁?跺?????扮??搴??ㄧ?搴??ㄥ?朵??㈢??涓???宸辯??绱㈠?锛?浠???婊¤凍蹇????ユ?懼??瀹?浣???甯?寮?搴??ㄧ?搴??????姐??

JMS锛?锛?Java?Message?Service锛?JAVA娑??????°??涓昏?瀹??闆??涓?搴??ㄧ?搴?涔??寸????璁????????瑰?圭?瑰??骞挎????

JTA锛?锛?Java?Transaction?API锛?JAVA浜??℃???°????渚???绉???甯?寮?浜??℃???°??搴??ㄧ?搴?????璋??ㄥ?舵??渚????ュ?ｅ?沖????

JAF锛?锛?Java?Action?FrameWork锛?JAVA瀹??ㄨ?よ??妗??躲????渚?涓?浜?瀹??ㄦ?у?舵?歸?㈢??妗??躲??璁╁???????杩???绉??ㄧ講????瀹?涔?瀹??拌??宸辯??涓??у???ㄦ?у?剁???ャ??

RMI/IIOP:锛?Remote?Method?Invocation?/internet瀵矽薄璇鋒?涓?浠???璁?锛?浠?浠?涓昏??ㄤ???杩?杩?绋?璋??ㄦ???°??渚?濡?锛?杩?绋???涓??拌?＄???轟?杩?琛?涓?涓?绋?搴?锛?瀹???渚??＄エ???????★???浠???浠ュ?ㄦ???拌?＄???轟?瀹??闆?瑰?剁?存?ヨ??ㄣ??褰??惰???瑕???杩?涓?瀹???瑙??????藉?ㄥ?????绯葷?涔??磋?琛???淇°??RMI??JAVA?規??????

96??JAVA璇?瑷?濡?浣?杩?琛?寮?甯稿???锛??抽??瀛?锛?throws,throw,try,catch,finally????浠ｈ〃浠?涔???涔?锛???ry??涓???浠ユ???哄?甯稿??锛?

Java??杩??㈠??瀵矽薄???規?杩?琛?寮?甯稿???锛?????绉?涓?????寮?甯歌?琛???绫夥?骞舵??渚?浜???濂界???ュ?ｃ????ava涓?锛?姣?涓?寮?甯擱?芥??涓?涓?瀵矽薄锛?瀹???Throwable绫繪???跺??瀛?绫葷??瀹?渚???褰?涓?涓??規??虹?闆?甯稿??渚挎???轟?涓?寮?甯稿?矽薄锛?璇ュ?矽薄涓???????寮?甯鎬俊??锛?璋??ㄨ?涓?瀵矽薄???規???浠ユ???峰?拌?涓?寮?甯稿苟杩?琛?澶?????Java??寮?甯稿???????杩?5涓??抽??璇??ュ???扮??锛?try??catch??throw??throws??finally??涓??????典?????ry?ユ?ц?涓?娈電?搴?锛?濡????虹?闆?甯革?绯葷?浼????猴?throws锛?涓?涓?寮?甯革?杩??跺??浣???浠ラ??杩?瀹???绫誨???ユ????锛?catch锛?瀹?锛???????锛?finally锛??辯己??澶????ㄦ?ュ?????

??ry?ユ??瀹?涓???棰??叉????"寮?甯???绋?搴???绱ц???ry绋?搴??????搴?????涓?涓?catch瀛??ユ?ユ??瀹?浣??寵???????"寮?甯???绫誨????

throw璇??ョ?ㄦ?ユ??纭??版???轟?涓?"寮?甯???

throws?ㄦ?ユ????涓?涓??????芥?闆???芥???虹????绉?"寮?甯???

Finally涓虹‘淇?涓?娈典唬??涓?绠″????浠?涔?"寮?甯??借??ц?涓?娈典唬????

??浠ュ?ㄤ?涓??????芥?拌??ㄧ??澶??㈠??涓?涓?try璇??ワ??ㄨ?涓??????芥?闆???ㄥ?????涓?try璇??ヤ??ゅ?朵?浠ｇ????姣?褰????頒?涓?try璇??ワ?"寮?甯???妗??跺氨?懼?闆????涓?????村?版??????try璇??ラ?藉??????濡???涓?涓?绾х??try璇??ユ病??瀵規??绉?"寮?甯?杩?琛?澶???锛?????灏變?灞?寮?锛??村?伴???版??澶???杩?绉?"寮?甯???try璇??ャ??

97??涓?涓?".java"婧???浠朵腑??????浠ュ????澶?涓?绫夥?涓??????ㄧ被锛?锛???浠?涔????訛?

??浠ャ??蹇?椤誨????涓?涓?绫誨??涓???浠跺???稿????

98??MVC????涓??ㄥ???芥???ｄ??????ュ????濡?浣?瀹????

MVC??Model锛?View锛?Controller??绠?????"Model"?浠ｈ〃????搴??ㄧ??涓??￠?昏?锛???杩?JavaBean锛?EJB缁?浠跺???幫?锛??"View"???搴??ㄧ??琛ㄧず?????SP椤甸??駭??锛?锛?"Controller"?????渚?搴??ㄧ??澶???杩?绋??у?訛?涓?????涓?涓?Servlet锛?锛???杩?杩?绉?璁捐?℃ā????搴??ㄩ?昏?锛?澶???杩?绋????劇ず?昏?????涓?????缁?浠跺???般??杩?浜?缁?浠跺??浠ヨ?琛?浜や??????ㄣ??

99??java涓?????绉??規???浠ュ???頒?涓?绾跨?锛??ㄤ?涔??抽??瀛?淇?楗闆??姝ユ?規???stop()??suspend()?規?涓轟?涓??ㄨ??浣跨???

??涓ょ?瀹??版?規?锛???????缁ф??hread绫諱?瀹???unnable?ュ??

??ynchronized?抽??瀛?淇?楗闆??姝ユ?規?

??瀵逛嬌??top()锛?????涓哄??涓?瀹??ㄣ??瀹?浼?瑙ｉ?ょ?辯嚎绋??峰??????????瀹?锛???涓?濡???瀵矽薄澶?浜?涓?绉?涓?杩?璐??舵??锛??ｄ??朵?绾跨??藉?ㄩ?ｇ??舵??涓?妫??ュ??淇??瑰??浠???缁???寰??炬??ュ?虹??姝ｇ????棰????ㄣ??suspend()?規?瀹規??????姝婚????璋???uspend()???跺??锛?????绾跨?浼???涓??ワ?浣??翠??舵?????ㄨ?涔????峰?????瀹???姝ゆ?訛??朵?浠諱?绾跨??戒??借?塊????瀹???璧?婧?锛??ら??琚?"??璧???绾跨??㈠?杩?琛???瀵逛換浣?绾跨??ヨ?達?濡???瀹?浠??蟲?㈠?????绾跨?锛????跺??璇??句嬌?ㄤ換浣?涓?涓???瀹???璧?婧?锛?灏變?????姝婚??????浠ヤ?搴?璇ヤ嬌??uspend()锛???搴??ㄨ??宸辯??Thread绫諱腑缃??ヤ?涓???蹇?锛????虹嚎绋?搴?璇ユ椿?ㄨ?????璧楓???ユ??蹇????虹嚎绋?搴?璇ユ??璧鳳?渚跨??ait()?藉?惰??ョ??寰??舵?????ユ??蹇????虹嚎绋?搴?褰??㈠?锛????ㄤ?涓?notify()???闆???ㄧ嚎绋???

100??java涓?????绉?绫誨????娴?锛?JDK涓烘??绉?绫誨????娴???渚?浜?涓?浜??借薄绫諱互渚?缁ф?匡?璇瘋?村?轟?浠?????????浜?绫夥?

瀛???娴?锛?瀛?绗????瀛???娴?缁ф?誇?InputStream??OutputStream锛?瀛?绗??缁ф?誇?InputStreamReader??OutputStreamWriter????ava.io??涓?杩???璁稿??朵???娴?锛?涓昏???涓轟???楂??ц?藉??浣跨?ㄦ?逛究??

?101??java涓?浼?瀛??ㄥ??瀛?娉?婕???锛?璇風??????杩般??

浼???濡?锛?int?i,i2;??return?(i-i2);???file://when?i涓鴻凍澶?澶х??姝ｆ??i2涓鴻凍澶?澶х??璐??般??缁???浼?????婧??锛?瀵艱?撮??璇???

102??java涓?瀹??闆??????哄?舵??浠?涔?锛?

?規???????Overriding????杞?verloading??Java澶????х??涓???琛ㄧ?般??????Overriding???剁被涓?瀛?绫諱??村????х??涓?绉?琛ㄧ?幫???杞?verloading??涓?涓?绫諱腑澶????х??涓?绉?琛ㄧ?般??

103?????懼???跺?ㄧ???烘????????浠?涔?锛????懼???跺?ㄥ??浠ラ┈涓????跺??瀛???锛???浠?涔???娉?涓誨?ㄩ???ヨ?????鴻?琛????懼???訛?

瀵逛?GC?ヨ?達?褰?绋?搴?????寤哄?矽薄?訛?GC灏卞?濮????ц?涓?瀵矽薄???闆????澶у?浠ュ??浣跨?ㄦ???點????甯革?GC???ㄦ?????劇???瑰?璁闆???绠＄????(heap)涓???????瀵矽薄????杩?杩?绉??瑰?纭?瀹???浜?瀵矽薄??"??杈劇??"锛???浜?瀵矽薄??"涓???杈劇??"??褰?GC纭?瀹?涓?浜?瀵矽薄涓?涓???杈??訛?GC灏辨??璐ｄ換???惰?浜???瀛?绌洪?淬????浠ャ??绋?搴?????浠ユ???ㄦ?ц?System.gc()锛?????C杩?琛?锛?浣???Java璇?瑷?瑙???骞朵?淇?璇?GC涓?瀹?浼??ц???

104????????????瀹?渚????????哄??锛?

static?i?=?10;?file://甯擱??

???class?A?a;??a.i?=10;//????

105??浠?涔???java搴?????锛?濡?浣?瀹???ava搴?????锛?

搴?????灏辨??涓?绉??ㄦ?ュ???瀵矽薄娴????哄?訛???璋?瀵矽薄娴?涔?灏辨??灏?瀵矽薄????瀹矽?琛?娴???????浠ュ?規???????瀵矽薄杩?琛?璇誨????浣?锛?涔???灏?娴???????瀵矽薄浼?杈?浜?缃?缁?涔??淬??搴???????涓轟?瑙ｅ?沖?ㄥ?瑰?矽薄娴?杩?琛?璇誨????浣??舵??寮???????棰???

搴???????瀹??幫?灏???瑕?琚?搴???????绫誨????erializable?ュ?ｏ?璇ユ?ュ?ｆ病????瑕?瀹??扮???規?锛?implements?Serializable????涓轟???娉ㄨ?ュ?矽薄????琚?搴???????锛??跺??浣跨?ㄤ?涓?杈??烘?(濡?锛?FileOutputStream)?ユ????涓?涓?ObjectOutputStream(瀵矽薄娴?)瀵矽薄锛??ョ??锛?浣跨??bjectOutputStream瀵矽薄??writeObject(Object?obj)?規?灏卞??浠ュ????頒負obj??瀵矽薄?????充?瀛??剁?舵??)锛?瑕??㈠???璇????ㄨ??ユ???

106????????浠ヤ?涓?涓?static?規????ㄥ???哄?歸??static?規???璋????

涓???浠?濡????朵腑????瀵矽薄??method()锛?涓??戒?璇?瀵矽薄??濮???.

107????clone()?規??訛???甯擱?芥??涓?琛?浠ｇ??锛???浠?涔?锛?

Clone???缂虹??琛?涓猴?super.clone();浠?璐?璐ｄ駭??姝ｇ‘澶у???绌洪?達?骞堕??浣?澶??躲??

108????AVA涓?锛?濡?浣?璺沖?哄?????澶???宓?濂?寰???锛?

??reak;?return??規???

109??List??Map??Set涓?涓??ュ?ｏ?瀛?????绱??訛?????浠?涔??圭?癸?

List?浠ョ?瑰??娆″??ユ??????绱?锛???????澶???绱???Set???娉??ユ????澶???绱?,???ㄦ??搴???Map?淇?瀛?key-value?鹼?value??澶??箋??

110??J2EE??浠?涔?锛?

J2EE??Sun???告???虹??澶?灞?(multi-diered),??甯?寮?(distributed),?轟?缁?浠?component-base)??浼?涓?绾у??ㄦā??(enterpriese?application?model).?ㄨ??風??涓?涓?搴??ㄧ郴缁?涓?锛??????у???藉????涓轟?????缁?浠訛?杩?浜?缁?浠跺?????ㄤ???璁＄???轟?锛?骞朵?澶?浜??稿???灞?娆?tier)涓?????灞?灞?娆″????瀹㈡?峰?(clietn?tier)缁?浠?web灞???缁?浠?Business灞???缁?浠?浼?涓?淇℃??绯葷?(EIS)灞???

111??UML?歸?⒙?

????寤烘ā璇?瑷?UML???ㄤ?????????????绫誨?俱??瀵矽薄?懼??????,琛?涓哄??浜や???椤哄?????浣???,瀹??闆?俱??

112??璇村?轟?浜?甯哥?ㄧ??绫夥???锛??ュ?ｏ?璇峰??涓?涓?

甯哥?ㄧ??绫夥?BufferedReader??BufferedWriter??FileReader??FileWirter??String??Integer

甯哥?ㄧ????锛?java.lang??java.awt??java.io??java.util??java.sql

甯哥?ㄧ???ュ?ｏ?Remote??List??Map??Document??NodeList?

113??寮???涓??界?ㄥ?頒??ｄ?璁捐?℃ā寮???ㄥ?ㄤ?涔??哄????

姣?涓?妯″??芥??杩頒?涓?涓??ㄦ??浠?????澧?涓?涓????虹?扮????棰?锛??跺????杩頒?璇ラ??棰???瑙ｅ?蟲?規????稿?????杩?杩?绉??瑰?锛?浣???浠ユ???版?″?頒嬌?ㄩ?ｄ?宸叉????瑙ｅ?蟲?規?锛??????ㄩ??澶??稿????宸ヤ???涓昏??ㄥ?頒?MVC??璁捐?℃ā寮????ㄦ?ュ???JSP/Servlet????J2EE???稿?沖??ㄣ??绠???宸ュ??妯″?绛???

114??jsp????浜??ㄤ??浣??ㄥ??????浠?涔???

JSP?辨??浠ヤ?6绉??烘???ㄤ??jsp:include锛??ㄩ〉?㈣?璇鋒????跺??寮??ヤ?涓???浠躲???jsp:useBean锛?瀵繪?炬????瀹?渚???涓?涓?JavaBean???jsp:setProperty锛?璁劇疆JavaBean??灞??с???jsp:getProperty锛?杈??烘??涓?JavaBean??灞??с???jsp:forward锛???璇鋒?杞??頒?涓??扮??椤甸?????jsp:plugin锛??規??娴?瑙??ㄧ被??涓?ava??浠剁????OBJECT??EMBED??璁般??

115??Anonymous?Inner?Class?(?垮?????ㄧ被)???????浠?xtends(缁ф???跺??绫夥???????浠?mplements(瀹???interface(?ュ????

??浠ョ戶?垮?朵?绫繪??瀹????朵??ュ?ｏ???wing缂?绋?涓?甯哥?ㄦ?ゆ?瑰???

116??搴??ㄦ???″?ㄤ?WEB?SERVER???哄??锛?

搴??ㄦ???″???Weblogic??Tomcat??Jboss

WEB?SERVER锛?IIS???Apache

117??BS涓?CS????绯諱??哄????

C/S??Client/Server??缂╁???????″?ㄩ??甯擱???ㄩ???ц?界??PC??宸ヤ?绔???灏????猴?骞堕???ㄥぇ???版??搴?绯葷?锛?濡?Oracle??Sybase??Informix???SQL?Server??瀹㈡?風????瑕?瀹?瑁?涓??ㄧ??瀹㈡?風??杞?浠躲??

B/锛蟲??Brower/Server??缂╁??锛?瀹㈡?鋒?轟???瑕?瀹?瑁?涓?涓?娴?瑙????Browser锛?锛?濡?Netscape?Navigator??Internet?Explorer锛????″?ㄥ??瑁?Oracle??Sybase??Informix???SQL?Server绛??版??搴????ㄨ?绉?缁???涓?锛??ㄦ?風???㈠???ㄩ??杩?WWW娴?瑙??ㄥ???幫?涓??ㄥ??浜??￠?昏??ㄥ??绔?瀹??幫?浣???涓昏?浜??￠?昏??ㄦ???″?ㄧ??瀹??般??娴?瑙??ㄩ??杩?锛?b?Server????版??搴?杩?琛??版??浜や???

C/S?涓??B/S??哄??锛??

锛?锛?纭?浠剁??澧?涓???:?

????C/S?涓???寤虹???ㄤ??ㄧ??缃?缁?涓?,?灏????撮????缃?缁???澧?,?灞???缃?涔??村????杩?涓??ㄦ???″?ㄦ??渚?杩??ュ???版??浜ゆ?㈡????

????B/S?寤虹???ㄥ箍??缃?涔?涓???,?涓?蹇???涓??ㄧ??缃?缁?纭?浠剁??澧?,渚?涓??佃??涓?缃?,?绉??ㄨ?懼?.?淇℃????宸辯?＄??.???姣?C/S?村己????搴??????涓?????瑕?????浣?绯葷???娴?瑙??ㄥ氨琛??

锛?锛?瀵瑰???ㄨ?姹?涓????

????C/S?涓????㈠???稿?瑰?哄?????ㄦ?風兢,?瀵逛俊??瀹??ㄧ???у?惰?藉??寰?寮??涓???楂?搴??哄????淇℃??绯葷?????/S?缁?????瀹?.???浠ラ??杩?B/S??甯??ㄥ??????寮?淇℃??.

????B/S?寤虹???ㄥ箍??缃?涔?涓?,?瀵瑰???ㄧ???у?惰?藉???稿?瑰急,????介?㈠??涓????ョ???ㄦ?楓??

锛?锛?瀵圭?搴??舵??涓????

????C/S?绋?搴???浠ユ?村??娉ㄩ??娴?绋?,???浠ュ?規????澶?灞?娆℃?￠??,?瀵圭郴缁?杩?琛???搴???浠ヨ?灏?????.

????B/S?瀵瑰???ㄤ互??璁塊????搴???澶?????????,?寤虹???ㄩ??瑕??村??浼??????虹?涔?涓?.?姣?C/S???撮????瑕?姹??B/S缁?????绋?搴??舵??????灞???瓒????浠?MS??.Net绯誨????BizTalk?2000?Exchange?2000绛?,??ㄩ?㈡????缃?缁?????浠舵??寤虹??绯葷?.?SUN???IBM?ㄧ??JavaBean???浠舵????绛?,浣柯?B/S?村??????.?

锛?锛?杞?浠堕???ㄤ????

????C/S?绋?搴???浠ヤ????垮?????翠??ц????,???浠剁?????ㄦ?т?濡???/S瑕?姹?涓?????浠剁?????ㄦ?уソ.

????B/S?瀵圭??澶???缁???,瑕?姹???浠剁?稿?圭??绔?????????藉??稿?矽?濂界??????灏卞?ヤ拱?ョ??椁?妗???浠ュ???╃????涓??????ㄥ?涓????沖ご妗?瀛??

锛?锛?绯葷?缁存?や?????

????C/S?绋?搴??變??翠????蹇?椤繪?翠???瀵?,?澶????虹?扮????棰?浠ュ??绯葷???绾????绾ч??????芥??????涓?涓??ㄦ?扮??绯葷?

????B/S???浠剁???,?歸?㈡??浠朵釜?????存??瀹??扮郴缁?????缂???绾??绯葷?缁存?ゅ??????版??灏?.?ㄦ?蜂?缃?涓???宸變?杞藉??瑁?灏卞??浠ュ???闆??绾??

锛?锛?澶?????棰?涓????

????C/S?绋?搴???浠ュ????ㄦ?烽?㈠?哄??,?骞朵??ㄧ?稿???哄??,?瀹??ㄨ?姹?楂???姹?,?涓???浣?绯葷??稿???搴?璇ラ?芥???稿????绯葷?

????B/S?寤虹???ㄥ箍??缃?涓?,??㈠??涓??????ㄦ?風兢,????ｅ?闆??,?杩???C/S??娉?浣??扮??.?涓???浣?绯葷?骞沖?闆?崇郴??灏?.?

锛?锛??ㄦ?鋒?ュ?ｄ????

????C/S?澶???寤虹????Window骞沖?頒?,琛ㄧ?版?規?????,瀵圭?搴???????瑕?姹?杈?楂?

????B/S?寤虹???ㄦ?瑙??ㄤ?,????村??涓闆???????ㄧ??琛ㄧ?版?瑰?涓??ㄦ?蜂氦娴?.?骞朵?澶ч?ㄥ???懼害??浣?,??浣?寮???????.?

锛?锛?淇℃??娴?涓????

????C/S?绋?搴?涓??????稿????涓?澶????????烘?寮?澶???,?浜や??х?稿?逛?

????B/S?淇℃??娴?????????,?B-B?B-C?B-G绛?淇℃????娴?????????,??村??浜ゆ??涓?蹇???

118??LINUX涓?绾跨?锛?GDI绫葷??瑙ｉ????

LINUX瀹??扮??灏辨???轟??稿?杞婚??绾ц?绋???"涓?瀵逛?"绾跨?妯″??锛?涓?涓?绾跨?瀹?浣?瀵瑰?涓?涓??稿?杞婚??绾ц?绋?锛???绾跨?涔??寸??绠＄???ㄦ?稿??芥?闆?涓?瀹??般???

GDI绫諱負?懼??璁懼?缂?绋??ュ?ｇ被搴???

119??STRUTS??搴???濡?STRUTS?舵??)?

Struts??????ava?Servlet/JavaServer?Pages????锛?寮???Web搴??ㄧ?搴???寮??炬?????framework???????truts?藉????哄?轟?MVC(Model-View-Controller)璁捐?℃ā寮???搴??ㄦ???躲???Struts??濡?涓???涓昏????斤??涓?.????涓?涓?controller?servlet锛??藉??ㄦ?風??璇鋒??????扮?稿???Action瀵矽薄???浜?.JSP????ag搴?锛?骞朵???ontroller?servlet涓???渚??寵??????锛?甯??╁???????寤轟氦浜?寮?琛ㄥ??搴??ㄣ???涓?.??渚?浜?涓?绯誨??瀹??ㄥ?矽薄锛?XML澶???????杩?Java?reflection?APIs???ㄥ???JavaBeans灞??с???介????????绀哄??娑?????

120??Jdo??浠?涔???

JDO??Java瀵矽薄??涔??????扮??瑙???锛?涓?ava?data?object??绠?绉?涔???涓?涓??ㄤ?瀛?????绉??版??浠?搴?涓???瀵矽薄????????API??JDO??渚?浜???????瀵矽薄瀛??????姝ゅ?瑰???浜哄???ヨ?達?瀛??ㄦ?版??瀵矽薄瀹??ㄤ???瑕?棰?澶???浠ｇ??锛?濡?JDBC?API??浣跨?????杩?浜?绻?????渚?琛?宸ヤ?宸茬?杞?绉誨??DO浜у????渚???韬?涓?锛?浣垮???浜哄??瑙ｈ?卞?烘?ワ?浠?????涓??堕?村??绮懼???ㄤ??￠?昏?涓??????锛?JDO寰??墊椿锛???涓哄????浠ュ?ㄤ換浣??版??搴?灞?涓?杩?琛???JDBC?????㈠???崇郴?版??搴?锛?RDBMS锛?JDO?撮???????渚??頒換浣??版??搴?灞???瀛??ㄥ???斤?姣?濡??崇郴?版??搴?????浠躲??XML浠ュ??瀵矽薄?版??搴?锛?ODBMS锛?绛?绛?锛?浣垮?搴??ㄥ??绉繪??ф?村己???

?