jsp面试题

娴?瑙???sp锛?html涔??寸???崇郴

1.JSP涓?Java?Servlet涓??凤????ㄦ???″?ㄧ???ц???锛???甯歌???璇ュ?㈡?风????灏辨??涓?涓?HTML????锛???姝ゅ?㈡?风????瑕???娴?瑙??ㄥ氨?芥?瑙?

2.?ㄥぇ澶???rowser/Server缁?????Web搴??ㄤ腑锛?娴?瑙??ㄧ?存?ラ??杩?HTML????JSP??褰㈠?涓??ㄦ?蜂氦浜?锛???搴??ㄦ?风??璇锋?

3.JSP?ㄦ???″?ㄤ??ц?锛?骞跺??ц?缁???杈??哄?板?㈡?风??娴?瑙??????浠???浠ヨ?村?烘??涓?涓?娴?瑙??ㄦ????

??瀹?涔???绛捐?缁ф?垮??涓?绫?/h2>

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杩?涓?绫诲??浠ョ户??agSupport????BodyTagSupport锛?涓よ????宸????????????ㄤ?娌℃??涓讳?????绛撅??????????ㄤ???涓讳?????绛俱??濡??????╃户??agSupport锛???浠ュ????oStartTag??doEndTag涓や釜?规?瀹???ag?????斤?濡??????╃户??odyTagSupport锛???浠ュ????oAfterBody杩?涓??规???

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杩?婊ゅ??ilter??浣??ㄥ????缃?

杩?婊ゅ?ㄧ??浣???

杩?婊ゅ?ㄦ??涓?涓?瀵硅薄锛???浠ヤ?杈?璇锋???淇??瑰??搴???瀹???浠ュ?ㄨ?锋??拌揪Servlet/JSP涔???瀵瑰?惰?琛?棰?澶???锛???涓??藉??ㄥ??搴?绂诲?Servlet/JSP涔???瀵瑰?惰?琛???澶???????浠ュ???浣?????涓?Servlet/JSP??瑕??ц????风???版??杞??㈡??椤甸?㈠?????璇?锛?浣?灏卞??浠ュ??涓?涓?杩?婊ゅ?ㄧ被锛??跺???ㄩ?ㄧ讲??杩版??浠讹?web.xml锛?涓???璇ヨ?婊ゅ?ㄤ?瀵瑰???Servlet/JSP??绯昏捣?ャ??浣???浠ヤ?涓?杩?婊ゅ?ㄤ互浣??ㄤ?涓?涓???涓?缁?servlet锛??朵釜??澶?涓?杩?婊ゅ?ㄨ?借?婊や?涓???澶?涓?servlet??涓?涓?杩?婊ゅ?ㄥ????ava.servlet.Filter?ュ?ｅ苟瀹?涔?瀹???涓?涓??规?锛?

1锛??void?init(FilterConfig?config)?throws?ServletException:?ㄨ?婊ゅ?ㄦ?ц?service??琚?璋????浠ヨ?剧疆杩?婊ゅ?ㄧ????缃?瀵硅薄??

2?void?destroy();?ㄨ?婊ゅ?ㄦ?ц?service??琚?璋??ㄣ??

3?Void?doFilter(ServletRequest?req锛?ServletResponse?res锛?FilterChain?chain)?throws?IOException锛?ServletException;

forward锛?涓?redirect????哄???????浜??瑰?瀹???/h2>

?

forward???????涓?椤甸?㈠??杞藉?版??椤甸???涓??瑰??娴?瑙??ㄧ??璺?寰?锛?redirect??璺宠浆?板???涓?椤甸???浼??瑰??娴?瑙??ㄧ??璺?寰?

??瀹???:???response.sendRedirect(潭??瀹?????璺?寰???)

杞???:?????request.getRequestDispatcher(潭杞???璺?寰???).forward(request锛??response);

?

jsp??缃?瀵硅薄??浣????

??涔?涓???缃?瀵硅薄锛?request??response??out??session??application??pageContext??config??page??exception

浣??ㄥ?涓?锛?

(1)?HttpServletRequest绫荤??Request瀵硅薄

浣????浠ｈ〃璇锋?瀵硅薄锛?涓昏??ㄤ??ュ??瀹㈡?风????杩?HTTP??璁?杩??ヤ?杈??版???″?ㄧ?????版????

(2)?HttpServletResponse绫荤??Respone瀵硅薄

浣????浠ｈ〃??搴?瀵硅薄锛?涓昏??ㄤ???瀹㈡?风???????版??

(3)?JspWriter绫荤??out瀵硅薄

浣????涓昏??ㄤ???瀹㈡?风??杈??烘?版??;?

????????Out???虹被??JspWriter

(4)?HttpSession绫荤??session瀵硅薄

浣????涓昏??ㄤ??ュ????淇?瀛?姣?涓??ㄦ?蜂俊??锛?涓?璇锋??宠????浼?璇?锛?

?????????浼?璇??舵??缁存????Web搴??ㄥ?????蹇?椤婚?㈠?圭????棰???

(5)?ServletContex绫荤??application瀵硅薄

浣????涓昏??ㄤ?淇?瀛??ㄦ?蜂俊??锛?浠ｇ????娈电??杩?琛???澧?锛?

????????瀹???涓?涓??变韩????缃?瀵硅薄锛??充?涓?瀹瑰?ㄤ腑??澶?涓??ㄦ?峰?变韩涓?涓?application瀵硅薄锛????朵?瀛???淇℃??琚??????ㄦ?锋???变韩.

(6)?PageContext绫荤??PageContext瀵硅薄

浣????绠＄??缃?椤靛??э?涓?SP椤甸?㈠??瑁?椤甸?㈢??涓?涓???锛?绠＄??瀵瑰?浜?JSP涓??规????瑙??ㄥ??涓?宸插?藉??瀵硅薄??璁块??锛?瀹?????寤哄????濮????芥???卞?瑰?ㄦ?ュ????????

(7)?ServletConfig绫荤??Config瀵硅薄

浣????浠ｇ????娈甸??缃?瀵硅薄锛?琛ㄧずServlet????缃???

(8)?Object绫荤??Page锛??稿?浜?this锛?瀵硅薄

浣????澶???JSP缃?椤碉???Object绫荤??涓?涓?瀹?渚?锛???????JSP瀹??扮被??瀹?渚?锛??冲??涔???JSP??韬?锛???????SP椤甸?㈣???翠?????????娉?????

(9)Exception

浣????澶???JSP??浠舵?ц??跺????????璇???寮?甯?

濡?????SP寮???涓?涓???澶╃?搴?锛?涓??ㄦ?版??搴?瀛??ㄨ??澶╃邯褰?锛?璇烽????澶╄?板???濂藉???ㄥ???锛?涓???

Application

doPost锛?doGet???哄???

1??褰?浣??存?ヨ?块??涓?涓?servlet?讹?璋??ㄧ????doGet?规??????

2??濡???浣???html???㈣?瀹?浜?method璁块????涓??规?锛???璋??ㄨ?ユ?规??????

3??get??post??浜ょ???版??????涓?涓??风??.get濂藉????澶????藉??rl??璺?8K锛??post娌¤?涓????堵?

jsp涔辩??濡?浣?瑙ｅ?筹???绉?瑙ｅ?虫?规???锛?

涓???JSP椤甸?㈡?剧ず涔辩??

浜???琛ㄥ????浜や腑???跺?虹?颁贡??

涓????版??搴?杩??ユ?跺?虹?颁贡??

椤甸?㈤?村?硅薄浼??????规?

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

????????request.setAttribute(key锛?value)

????????session.setAttribute(key锛?value)

????????application.setAttribute(key锛?value)

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

text?=?new?String(?text.getBytes(潭iso8859-1??锛???GBK??);

棣???浠モ??iso8859-1?宠В??涓?yte?扮?锛????ㄢ??GBK??????瀛?绗?覆

绠???浠?缁?涓?涓?servlet

servlet瀹瑰???

璐?璐ｅ???瀹㈡?疯?锋?????璇锋?浼???缁?servlet骞舵??缁???杩???缁?瀹㈡?枫??涓???绋?搴???瀹瑰?ㄥ????瀹??板???芥????????锛?浣?瀹瑰?ㄤ?servlet涔??寸???ュ?ｆ????ervletAPI瀹?涔?濂界??锛?杩?涓??ュ?ｅ??涔?浜?servlet瀹瑰?ㄥ??ervlet涓?瑕?璋??ㄧ???规???浼???缁?servlet??瀵硅薄绫汇??

servlet?????藉?ㄦ??锛?

servlet瀹瑰?ㄥ??寤?ervlet??涓?涓?瀹?渚?

瀹瑰?ㄨ??ㄨ?ュ??渚???init()?规?

濡???瀹瑰?ㄥ?硅??ervlet??璇锋?锛???璋??ㄦ?ゅ??渚???service()?规?

瀹瑰?ㄥ?ㄩ??姣???瀹?渚???璋??ㄥ????destroy()?规?

??姣?骞舵??璁拌?ュ??渚?浠ヤ?浣?涓哄???炬?堕??

涓????锋?浜?涓?涓?servlet锛?灏辨病????娉??绘?㈠?瑰?ㄦ?ц?涓?涓?瀹??寸?????藉?ㄦ????

瀹瑰?ㄥ??ervlet棣?娆¤?璋??ㄦ?跺??寤哄????涓?涓?瀹?渚?锛?骞朵???璇ュ??渚??ㄥ??瀛?涓?锛?璁╁??瀵规??????璇锋?杩?琛?澶?????瀹瑰?ㄥ??浠ュ?冲???ㄤ换浣??跺????杩?涓?瀹?渚?浠???瀛?涓?绉昏蛋???ㄥ?稿????妯″??涓?锛?瀹瑰?ㄤ负姣?涓?servlet??寤轰?涓???????瀹?渚?锛?瀹瑰?ㄥ苟涓?浼?姣??ュ?颁?涓?璇锋?灏卞??寤轰?涓??扮嚎绋?锛?????浣跨?ㄤ?涓?绾跨?姹??ュ?ㄦ????灏?绾跨?????缁??版?ョ??璇锋?锛?浣???杩?浠?servlet??瑙??规?ョ??锛???????涓烘??涓?璇锋???寤轰?涓??扮嚎绋????????稿????

BS涓?CS????绯讳??哄????

B/S妯″???????CP/IP??????涓?锛?浠?TTP涓轰?杈???璁?锛?瀹㈡?风????杩?Browser璁块??Web???″?ㄤ互??涓?涔??歌??????版?版??搴?????????浣?绯荤?????瀹??辨?瑙??ㄣ??Web???″?ㄣ??搴??ㄦ???″?ㄥ???版??搴????″?ㄧ?????瀹㈡?风????娴?瑙??ㄩ??杩?URL璁块??Web???″???Web???″?ㄨ?锋??版??搴????″???骞跺??峰???缁???浠?TML褰㈠?杩???瀹㈡?风??娴?瑙??ㄣ???

c/s?ㄧ郴缁??烘??涓???B/S?镐技锛?涓?杩???瑕??ㄥ?㈡?风??瀹?瑁?涓?涓?瀹㈡?风??杞?浠讹??辫?涓?杞?浠跺?规???″?ㄧ???版??杩?琛?璇诲??锛?灏卞????浠?甯哥?ㄧ??qq锛?灏辨??杩?绉?妯″????

JSP涓?SERVLET???哄????

JSP??缂?璇???SERVLET?跺????缂?璇???CLASS??浠堵??

?JSP????SERVLET????JAVA??浠垛??CLASS

jsp涓昏???瑙??惧?锛?servlet涓昏????у?跺?

JSP涓??ㄦ??INCLUDE涓?????INCLUDE???哄??锛?

?ㄦ??INCLUDE??sp:include?ㄤ?瀹??奥?瀹??绘??浼?妫??ユ??????浠朵腑??????锛??????ㄤ??????ㄦ??椤甸???骞朵???浠ュ甫???般???

????INCLUDE??nclude浼???瀹??帮?瀹?涓?浼?妫??ユ??????浠剁??????锛????ㄤ?????????椤甸??

JSP????缃?瀵硅薄???规???

9澶у??缃?瀵硅薄锛?

request锛?response锛?pagecontext锛?session锛?application锛?out锛?config锛?page锛?exception

request??HttpServletRequest??瀛?绫?

response??HttpServletResponse??瀛?绫?

session??HttpSession???瀛?绫?

pagecontext??PageContext??瀛?绫?

application??ServletContext???瀛?绫?

out??JspWriter???瀛?绫?

config??ServletConfig???瀛?绫宦?

page??Object???瀛?绫?

exception??Throwab???瀛?绫?

??绉?浼?璇?璺?韪?????

浼?璇?璺?韪???涓轰?璺?韪??ㄦ?蜂?service涔??寸??澶?娆′氦浜?.?

1.cookie?涔?灏辨????浠?甯歌???????/??浠跺す涓???涓?涓?COOKIE??褰??

2.session?姣?Cookie瀹???涓???瑙?.浣?????revice璧?婧??

3.url????.杩????ㄧ?ㄦ?风??IE绂?姝?ookie???跺?????ㄧ???规?????涓轰?绠℃??Cookie杩????session??借?????.??????

<%??>??<%!??>???哄??

<%??>?ㄤ???SP椤甸??腑宓???ava????

<%!??>?ㄤ???SP椤甸??腑?虫?????????规?锛???浠ュ?ㄨ?ラ〉??腑??<%??>????涓?璋????澹版?????????稿?浜?Servlet涓???瀹?涔?????????????

浣?璁や负??绉???椤垫??????楂???JSP?锛?MYSQL锛?SQL25.

SQL25????楂?锛?

????涓?ysql????椤佃??????ュ?烘??????璁板?锛???浠?璧峰?浣?缃?寮?濮??ュ?烘????瑕???璁板?锛?????SQL25涓?浼??ユ????璁板?锛????ョ??????????瑕???璁板?

绠???璇存??涓?浣?瀵?ervlet??璁よ??????ervlet???烘???舵???????藉?ㄦ??

HttpServlet绫绘??涓?涓??借薄绫伙???浠ヤ?璇ョ被娲剧???轰?涓?瀛?绫绘?ュ???颁?涓?HttpServlet锛??ュ???ヨ??Web绔??圭??璇锋?锛?璇ヨ?锋??ヨ??璁块??璇?eb绔??圭??瀹㈡?锋?瑙????锛?骞跺?澶?????????搴?缁???????Web绔??癸?Web绔??瑰??灏???搴?缁???????缁?瀹㈡?锋?瑙????锛???ttpServlet??瀛?绫讳腑锛?蹇?椤昏?冲???杞戒?琛ㄤ腑???朵腑涓?绉??规???

?规???doGet

?濡???Servlet????Http?GET璇锋?锛??ㄤ?Http?GET璇锋??

doPost

?濡???Servlet????Http?POST璇锋?锛??ㄤ?Http?POST璇锋??

doPut

?濡???Servlet????Http?PUT璇锋?锛??ㄤ?Http?PUT璇锋??

doDelete

?濡???Servlet????Http?DELETE璇锋?锛??ㄤ?Http?DELETE璇锋??

init??destroy

?濡?????瑕?绠＄??Servlet???藉?ㄦ??????????璧?婧?锛???浠ラ??杞借?涓や釜?规?

??甯革?涓???杞?ervice?规?锛?瀵逛?涓?琛ㄤ腑??姣?涓?绉?HTTP璇锋?锛?service?规???杩???娲惧??浠??扮?稿???Handler绾跨?锛?doXXX?规?锛??ュ???杩?浜???????HTTP璇锋???

???峰?帮???甯镐?涓???杞?oOptions??doTrace?规?锛?service?规???杩???娲惧??浠???oTrace??doOptions?ユ????HTTP1.1 TRACE??OPTIONS??

Servlet??甯歌?琛??ㄥ?绾跨??????″?ㄤ腑锛???姝わ???缂?????Servlet浠ｇ??蹇?椤昏?藉?澶???骞惰?璇锋???瀵规?版??璧?婧?????姝ヨ?块?????变韩璧?婧???????瀛?涓????版??锛?渚?濡?锛?瀹?渚???绫诲????锛???澶??ㄥ?硅薄锛?渚?濡?锛???浠躲???版??搴?杩??ユ??缃?缁?杩??ワ???

Protected void doGet(HttpServletRequest req锛?HttpServletResponse resp)

throws ServletException锛?IOException

浠?service?规???骞跺???HTTP GET璇锋???GET?规???璁稿?㈡?疯?诲???ヨ??Web???″?ㄧ??淇℃??锛?瀹㈡?烽??杩?浼???涓?涓?甯?RL???ヨ?㈠??绗?覆??浠ュ??璇????″?ㄥ????浠?涔?淇℃????

??杞芥????GET璇锋???doGet?规?杩?灏????ㄦ????HTTP HEAD璇锋?锛?HEAD璇锋?涔???涓?涓?GET璇锋?锛?瀹?寰??扮??杩?????搴?涓?????涓?涓?璇锋?澶达?header锛?瀛?娈碉???娌℃????搴?淇℃??????瀹广??

濡?????杞芥?规?锛?搴?璇ヤ?璇ヨ?锋?璇绘?版??锛??ㄥ??搴?涓?璁剧疆?翠釜headers锛?璁块??PrintWriter??杈??烘?瀵硅薄锛?????????搴??版????褰?璁剧疆headers?讹?搴?纭?淇?????content type??encoding??濡???浣跨??rintWriter瀵硅薄杩?????搴?锛??ㄥ????PrintWriter瀵硅薄涔???蹇?椤昏?剧疆content type??

Servlet寮???蹇?椤诲?ㄥ????搴??版??涔?????headers锛???涓哄?ㄥ???版??涔???headers???堕?藉???借??锋?般??

绠?????杩颁??版??杩??ユ???宸ヤ??哄?舵??浠?涔?锛?

?版??搴?杩??ユ??ㄥ??濮????跺???寤轰?瀹??伴?????版??搴?杩??ユ?惧?拌??ユ?涓?锛?杩?浜??版??搴?杩??ョ???伴?????辨??灏??版??搴?杩??ユ?版?ヨ?惧????????璁鸿?浜??版??搴?杩??ユ??????浣跨???杩??ユ??藉?涓??翠?璇??冲??ユ??杩?涔?澶???杩??ユ?伴????杩??ユ?????澶ф?版??搴?杩??ユ?伴????瀹?浜?杩?涓?杩??ユ??藉????????澶ц??ユ?帮?褰?搴??ㄧ?搴???杩??ユ?璇锋???杩??ユ?拌??杩???澶ц??ユ?伴???讹?杩?浜?璇锋?灏?琚????ュ?扮??寰?????涓???

?版??搴?杩??ユ?????灏?杩??ユ?板????澶ц??ユ?扮??璁剧疆瑕??????颁?????涓???绱?锛??

1)???灏?杩??ユ?版??杩??ユ?涓??翠??????版??搴?杩??ワ???浠ュ???搴??ㄧ?搴?瀵规?版??搴?杩??ョ??浣跨?ㄩ??涓?澶э?灏?浼???澶ч?????版??搴?杩??ヨ?婧?琚?娴?璐癸?

2)???澶ц??ユ?版??杩??ユ??界?宠?风????澶ц??ユ?帮?濡????版??搴?杩??ヨ?锋?瓒?杩?姝ゆ?帮????㈢???版??搴?杩??ヨ?锋?灏?琚????ュ?扮??寰?????涓?锛?杩?浼?褰卞??涔??????版??搴???浣???

3)?濡?????灏?杩??ユ?颁???澶ц??ユ?扮?稿樊澶?澶э??ｄ???????杩??ヨ?锋?灏?浼??峰?╋?涔???瓒?杩???灏?杩??ユ?伴????杩??ヨ?锋?绛?浠蜂?寤虹??涓?涓??扮???版??搴?杩??ャ??涓?杩?锛?杩?浜?澶т???灏?杩??ユ?扮???版??搴?杩??ュ?ㄤ娇?ㄥ??涓?浼?椹?涓?琚????撅?瀹?灏?琚??惧?拌??ユ?涓?绛?寰???澶?浣跨?ㄦ????绌洪?茶??跺??琚????俱??

jsp涔辩??濡?浣?瑙ｅ?筹?缁??轰?绉?浠ヤ???瀵瑰?瑙ｅ?虫?规?锛?骞剁??哄?瑰???绋?搴?妗?渚?锛?

涓???JSP椤甸?㈡?剧ず涔辩??

<%@?page?contentType=??text/html;?charset=gb2312??>

浜???琛ㄥ????浜や腑???跺?虹?颁贡??

request.seCharacterEncoding(潭gb2312??瀵硅?锋?杩?琛?缁?涓?缂???

涓????版??搴?杩??ュ?虹?颁贡??

瑕?娑???涓??????版?瑰?ㄩ?ㄦ??涔辩??锛?瑙ｅ?冲??娉?锛??ㄦ?版??搴????版??搴?URL涓???涓?useUnicode=true&characterEncoding=GBK灏?K浜???

??????杩?杩?婊ゅ?ㄥ????

浜?????erver.xml涓???璁剧疆缂????煎?

?㈠??瀵硅薄???瑰?????浜??归??/h2>

?

1.?借薄锛?

?借薄灏辨??蹇界?ヤ?涓?涓婚?涓?涓?褰??????????崇???ｄ??归???浠ヤ究?村?????版敞??涓?褰??????????崇???归?????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?归???涓???杩?绋??借薄锛?浜????版???借薄??

2.缁ф?匡?

缁ф?挎??涓?绉???缁?绫荤??灞?娆℃ā??锛?骞朵???璁稿??榧??辩被???????瀹???渚?浜?涓?绉???纭?琛ㄨ堪?辨?х???规???瀵硅薄??涓?涓??扮被??浠ヤ??版????绫讳腑娲剧??锛?杩?涓?杩?绋?绉颁负绫荤户?裤???扮被缁ф?夸???濮?绫荤???规?э??扮被绉颁负??濮?绫荤??娲剧??绫伙?瀛?绫伙?锛?????濮?绫荤О涓烘?扮被???虹被锛??剁被锛???娲剧??绫诲??浠ヤ?瀹????虹被?ｉ??缁ф?挎?规???瀹?渚?????锛?骞朵?绫诲??浠ヤ慨?规??澧????扮???规?浣夸??撮?????规??????瑕???

3.灏?瑁?锛?

灏?瑁?????杩?绋????版?????磋捣?ワ?瀵规?版????璁块?????介??杩?宸插??涔??????????㈠??瀵硅薄璁＄??濮?浜?杩?涓??烘??姒?蹇碉??崇?板??涓?????浠ヨ???缁???涓?绯诲??瀹??ㄨ??娌汇??灏?瑁???瀵硅薄锛?杩?浜?瀵硅薄??杩?涓?涓???淇??ょ???ュ?ｈ?块???朵?瀵硅薄??

4. 澶????э?

澶????ф??????璁镐???绫荤??瀵硅薄瀵瑰??涓?娑???浣??哄??搴???澶????у???????板??澶????у??????澶????с??澶????ц??瑷??锋???垫椿???借薄??琛?涓哄?变韩??浠ｇ???变韩??浼??匡?寰?濂界??瑙ｅ?充?搴??ㄧ?搴??芥?板??????棰???

?

String?????烘?????版??绫诲?????

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

java.lang.String绫绘??final绫诲????锛???姝や???浠ョ户?胯?涓?绫汇??涓??戒慨?硅?涓?绫汇??涓轰???楂?????????绌洪?达???浠?搴?璇ョ??tringBuffer绫?

int ?? Integer ??浠?涔??哄??

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

??濮?绫诲??灏?瑁?绫伙?booleanBoolean charCharacter byteByte shortShort

intInteger????????longLong????????floatFloat???? doubleDouble

寮??ㄧ被??????濮?绫诲????琛?涓哄???ㄤ???锛?骞朵?瀹?浠??锋??涓?????璇?涔???寮??ㄧ被??????濮?绫诲???锋??涓??????瑰????ㄦ?锛?瀹?浠?????锛?澶у?????搴???棰?锛?杩?绉?绫诲??浠ュ??绉?绫诲?????版??缁???瀛????褰?寮??ㄧ被??????濮?绫诲???ㄤ???涓?绫荤??瀹?渚??版???舵????瀹???缂虹???笺??瀵硅薄寮??ㄥ??渚???????缂虹???间负 null锛?????濮?绫诲??瀹?渚???????缂虹???间?瀹?浠???绫诲?????炽??

String ??StringBuffer???哄??

JAVA骞冲?版??渚?浜?涓や釜绫伙?String??StringBuffer锛?瀹?浠???浠ュ?ㄥ??????浣?瀛?绗?覆锛??冲????澶?涓?瀛?绗???瀛?绗??版????杩?涓?String绫绘??渚?浜??板?间????瑰????瀛?绗?覆????杩?涓?StringBuffer绫绘??渚???瀛?绗?覆杩?琛?淇??广??褰?浣??ラ??瀛?绗??版??瑕??瑰?????跺??浣?灏卞??浠ヤ娇??tringBuffer???稿???帮?浣???浠ヤ娇??tringBuffers?ュ?ㄦ??????瀛?绗??版????

杩?琛??跺?甯镐?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〃绀鸿?????虹????甯告??浣?涓????介???扮??寮?甯革???涓?绉?甯歌?杩?琛???璇???java缂?璇??ㄨ?姹??规?蹇?椤诲０?????哄???藉????????杩?琛??跺?甯革?浣???骞朵?瑕?姹?蹇?椤诲０?????烘??琚????风??杩?琛??跺?甯搞??

璇村??rrayList锛?Vector锛? LinkedList??瀛??ㄦ?ц?藉???规??/h2>

?

ArrayList??Vector?芥??浣跨?ㄦ?扮??瑰?瀛??ㄦ?版??锛?姝ゆ?扮???绱??板ぇ浜?瀹???瀛??ㄧ???版??浠ヤ究澧????????ュ??绱?锛?瀹?浠??藉??璁哥?存?ユ??搴??风储寮???绱?锛?浣??????ュ??绱?瑕?娑????扮???绱?绉诲?ㄧ????瀛???浣?锛???浠ョ储寮??版??蹇??????ユ?版?????Vector?变?浣跨?ㄤ?synchronized?规?锛?绾跨?瀹????锛???甯告?ц?戒?杈?ArrayList宸?锛???LinkedList浣跨?ㄥ?????捐〃瀹??板???????搴??风储寮??版????瑕?杩?琛???????????????锛?浣??????ユ?版???跺????瑕?璁板???椤圭??????椤瑰?冲??锛???浠ユ???ラ??搴??蹇???

?

Collection ?? Collections???哄????

Collection??????绫荤??涓?绾ф?ュ?ｏ?缁ф?夸?浠????ュ?ｄ富瑕???Set ??List.

Collections????瀵归????绫荤??涓?涓?甯??╃被锛?浠???渚?涓?绯诲???????规?瀹??板?瑰??绉?????????绱?????搴???绾跨?瀹??ㄥ??绛???浣???

&??&&???哄????

&??&&?藉??浣?涓洪?昏?杩?绠?绗???涓???浣跨???浣???&&??????璺?涓???锛?杩?绠??跺???ゆ??绗??峰???㈢??琛ㄨ揪寮????硷?濡????藉?纭?瀹??翠釜琛ㄨ揪寮????硷???涓?杩?琛?绗??峰???㈢??琛ㄨ揪寮???杩?绠???

???锛?&涔???浣?涓轰?杩?绠?绗?娇?ㄣ??

HashMap??Hashtable???哄????

HashMap??Hashtable??杞婚??绾у???帮???绾跨?瀹??ㄧ??瀹??帮?锛?浠?浠??藉????浜?Map?ュ?ｏ?涓昏??哄???ㄤ?HashMap??璁哥┖锛?null锛????硷?key锛?锛??变???绾跨?瀹????????涓????介??浜?Hashtable??

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

HashMap??Hashtable??contains?规??绘??浜?锛??规??containsvalue??containsKey????涓?ontains?规?瀹规??璁╀汉寮?璧疯??瑙ｃ??

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

??澶х??涓?????锛?Hashtable???规???Synchronize??锛???HashMap涓???锛??ㄥ?涓?绾跨?璁块??Hashtable?讹?涓???瑕???宸变负瀹????规?瀹??板??姝ワ???HashMap 灏卞?椤讳负涔???渚?澶???姝ャ??

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

final锛? finally锛? finalize???哄????

final ?ㄤ?澹版??灞??э??规???绫伙?????琛ㄧず灞??т?????锛??规?涓???瑕???锛?绫讳???缁ф?裤??

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

finalize??Object绫荤??涓?涓??规?锛??ㄥ???炬?堕???ㄦ?ц????跺??浼?璋??ㄨ????跺?硅薄??姝ゆ?规?锛???浠ヨ???姝ゆ?规???渚????炬?堕???剁???朵?璧?婧????讹?渚?濡??抽????浠剁????

sleep() ?? wait() ??浠?涔??哄???

sleep??绾跨?绫伙?Thread锛????规?锛?瀵艰?存?ょ嚎绋??????ц???瀹??堕?达?缁??ц??轰?缁??朵?绾跨?锛?浣??????х?舵??渚??朵???锛??版?跺??浼????ㄦ?㈠???璋???leep涓?浼????惧?硅薄????

wait??Object绫荤???规?锛?瀵规?ゅ?硅薄璋???ait?规?瀵艰?存??绾跨??惧?瀵硅薄??锛?杩??ョ??寰?姝ゅ?硅薄??绛?寰???瀹?姹?锛???????瀵规?ゅ?硅薄????otify?规?锛???notifyAll锛?????绾跨???杩??ュ?硅薄??瀹?姹???澶??峰?瀵硅薄??杩??ヨ?琛??舵????

Overload??Override???哄????Overloaded???规???????浠ユ?瑰??杩????肩??绫诲???

?规???????Overriding????杞?verloading??Java澶????х??涓???琛ㄧ?般??????Overriding???剁被涓?瀛?绫讳??村????х??涓?绉?琛ㄧ?帮???杞?verloading??涓?涓?绫讳腑澶????х??涓?绉?琛ㄧ?般??濡????ㄥ??绫讳腑瀹?涔????规?涓??剁?剁被???稿??????绉板?????帮???浠?璇磋?ユ?规?琚????? (Overriding)??瀛?绫荤??瀵硅薄浣跨?ㄨ?涓??规??讹?灏?璋??ㄥ??绫讳腑??瀹?涔?锛?瀵瑰????瑷?锛??剁被涓???瀹?涔?濡???琚???灞??解??浜???濡????ㄤ?涓?绫讳腑瀹?涔?浜?澶?涓????????规?锛?瀹?浠?????涓????????颁釜?版????涓????????扮被??锛???绉颁负?规?????杞?Overloading)??Overloaded???规?????浠ユ?瑰??杩????肩??绫诲????

error??exception??浠?涔??哄???

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

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

??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?变韩??渚?濡?姝ｅ?ㄥ?????版??浠ュ?????借????涓?绾跨?璇诲?帮?????姝ｅ?ㄨ?荤???版?????藉凡缁?琚????涓?绾跨???杩?浜?锛??ｄ?杩?浜??版??灏辨???变韩?版??锛?蹇?椤昏?琛???姝ュ??????

褰?搴??ㄧ?搴??ㄥ?硅薄涓?璋??ㄤ?涓?涓???瑕??辫垂寰??挎?堕?存?ユ?ц????规?锛?骞朵?涓?甯???璁╃?搴?绛?寰??规???杩????讹?灏卞?璇ヤ娇?ㄥ?姝ョ?绋?锛??ㄥ?澶????典????ㄥ?姝ラ??寰?寰?寰??存????????

abstract class??interface??浠?涔??哄???

澹版???规???瀛??ㄨ??涓??诲???板????绫昏??????借薄绫伙?abstract class锛?锛?瀹??ㄤ?瑕???寤轰?涓?浣??版??浜??烘??琛?涓虹??绫伙?骞朵负璇ョ被澹版???规?锛?浣?涓??藉?ㄨ?ョ被涓?瀹??拌?ョ被?????点??涓??藉??寤?bstract 绫荤??瀹?渚????惰????浠ュ??寤轰?涓?????锛??剁被????涓?涓??借薄绫伙?骞惰?╁???????蜂?瀛?绫荤??涓?涓?瀹?渚???涓??芥???借薄?????芥?版???借薄?????规???Abstract 绫荤??瀛?绫讳负瀹?浠??剁被涓????????借薄?规???渚?瀹??帮?????瀹?浠?涔????借薄绫汇??????浠ｄ?锛??ㄥ??绫讳腑瀹??拌?ユ?规????ラ???惰?涓虹???跺??绫诲??浠ュ?ㄧ被涓?瀹??拌?浜??规???

?ュ?ｏ?interface锛????借薄绫荤????浣????ㄦ?ュ?ｄ腑锛??????规??芥???借薄????澶?缁ф?挎?у????杩?瀹??拌??风???ュ?ｈ???峰????ュ?ｄ腑???????规??芥???借薄??锛?娌℃??涓?涓???绋?搴?浣????ュ?ｅ????浠ュ??涔?static final???????????ュ?ｇ??瀹??颁?瀛?绫荤?镐技锛??や?璇ュ???扮被涓??戒??ュ?ｅ??涔?涓?缁ф?胯?涓恒??褰?绫诲???扮?规???ュ?ｆ?讹?瀹?瀹?涔?锛??冲?绋?搴?浣?缁?浜?锛?????杩?绉??ュ?ｇ???规????跺??锛?瀹???浠ュ?ㄥ???颁?璇ユ?ュ?ｇ??绫荤??浠讳?瀵硅薄涓?璋??ㄦ?ュ?ｇ???规????变????借薄绫伙?瀹???璁镐娇?ㄦ?ュ?ｅ??浣?涓哄??ㄥ??????绫诲??????甯哥???ㄦ????缂?灏???????寮??ㄥ??浠ヨ浆?㈠?版?ュ?ｇ被????浠??ュ?ｇ被??杞????instanceof 杩?绠?绗???浠ョ?ㄦ?ュ?冲????瀵硅薄??绫绘???????颁??ュ?ｃ??

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?????

GC??浠?涔?? 涓轰?涔?瑕???GC?

????GC?????炬?堕????????锛?Gabage Collection锛?锛???瀛?澶?????缂?绋?浜哄??瀹规???虹?伴??棰????版?癸?蹇?璁版??????璇?????瀛????朵?瀵艰?寸?搴???绯荤???涓?绋冲?????冲穿婧?锛?Java??渚???GC???藉??浠ヨ???ㄧ??娴?瀵硅薄?????杩?浣??ㄥ??浠???杈惧?拌???ㄥ???跺??瀛???????锛?Java璇?瑷?娌℃????渚????惧凡??????瀛????剧ず??浣??规???

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?惰浆?㈢被??锛?

short s1 = 1; s1 += 1;锛???浠ユ?ｇ‘缂?璇?锛???why锛?A:+=杩?绠?绗???绫诲??杞??㈤??棰?锛?

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?规?杩???涓????版???ヨ????挎?存?帮????板??1/2??姹???loor.

String s = new String(潭xyz??);??寤轰???涓?String Object?

涓や釜

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=;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=;i<1;i++){

inc();

}

class Dec implements Runnable{

public void run(){

for(int i=;i<1;i++){

dec();

}

Java??娌℃??goto?

java涓???淇???瀛?锛??板?ㄦ病????ava涓?浣跨?ㄣ??

???ㄤ?涓?绾跨?????un()杩???start()?

???ㄤ?涓?绾跨???璋???tart()?规?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?灏变?绔??宠?琛???run()?规???浠ヤ骇??蹇?椤婚???虹????蹇??ュ??姝??涓?绾跨???

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

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

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

?ュ?ｅ??浠ョ户?挎?ュ?ｃ???借薄绫诲??浠ュ????implements)?ュ?ｏ??借薄绫诲??缁ф?垮??浣?绫?

List锛? Set锛? Map????户?胯??Collection?ュ??

List锛?Set??锛?Map

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

?戒???

?扮???娌℃??length()杩?涓??规?? String??娌℃??length()杩?涓??规?锛?

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

??????onstructor??????琚?override?

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

??????浠ョ户??tring绫?

String绫绘??final绫绘??涓???浠ョ户?裤??

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〃杈惧?????姝や???缁? switch ?? case 璇??ョ?????板?璇ユ?? int?? short?? char ???? byte??long锛?string ?戒??戒??ㄤ?swtich??

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???

缂?绋?棰?: ?ㄦ???????????规?绠???涔?浠?绛??煎???

2 << 3

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

涓?瀵癸????稿????hash code??

褰?涓?涓?绾跨?杩??ヤ?涓?瀵硅薄??涓?涓?synchronized?规???锛??跺??绾跨???????杩??ユ?ゅ?硅薄???跺???规??

涓??斤?涓?涓?瀵硅薄??涓?涓?synchronized?规????界?变?涓?绾跨?璁块????

缂?绋?棰?: ??涓?涓?Singleton?烘?ャ??????渚?妯″???

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?绫伙?瀹????????芥?颁负private??锛?瀹???涓?涓?static??private??璇ョ被????锛??ㄧ被??濮????跺??渚?璇?锛???杩?涓?涓?public??getInstance?规??峰??瀵瑰????寮????缁ц??璋??ㄥ?朵腑???规???

public class Singleton {

private Singleton(){}

???? //?ㄨ??宸卞???ㄥ??涔???宸变?涓?瀹?渚?锛???涓???寰?濂???锛?

???? //娉ㄦ??杩???private ??渚????ㄨ???

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

???? //杩?????渚?浜?涓?涓?渚?澶??ㄨ?块????class???????规?锛???浠ョ?存?ヨ?块??????

???? public static Singleton getInstance() {

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

???? }

}

绗?浜?绉?褰㈠?:

public class Singleton {

????private static Singleton instance = null;

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

????//杩?涓??规?姣?涓??㈡?????硅?锛?涓??ㄦ??娆￠?借?琛?????瀵硅薄锛?????绗?涓?娆°?????? ??

????//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?绫伙?瀹????????芥?颁负private??锛??????规?涓?tatic????

涓???璁や负绗?涓?绉?褰㈠?瑕??村??瀹??ㄤ?

璇疯?村?轰????ラ????绾跨???姝ョ???规???

wait():浣夸?涓?绾跨?澶?浜?绛?寰??舵??锛?骞朵????炬????????瀵硅薄??lock??

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

notify():?ら??涓?涓?澶?浜?绛?寰??舵????绾跨?锛?娉ㄦ???????ㄨ??ㄦ?ゆ?规????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?瀵硅薄????锛?????璁╁??浠?绔?浜???

浣????ラ????????绫婚?芥????浜?锛?涓昏??规?锛?

??甯哥?ㄧ??????绫绘?? List ?? Map?? List ???蜂?瀹??板???? ArrayList ?? Vector锛?瀹?浠???????澶у?????琛??姣?杈???????寤恒??瀛??ㄥ????浣?浠讳?绫诲??瀵硅薄????绱???琛ㄣ?? List ???ㄤ????板?肩储寮?璁块????绱?????褰???

Map ??渚?浜?涓?涓??撮???ㄧ????绱?瀛??ㄦ?规??? Map ????绫荤?ㄤ?瀛??ㄥ??绱?瀵癸?绉颁????????????尖??锛?锛??朵腑姣?涓?????灏??颁?涓??笺??

char??????涓??戒??藉??璐?涓?涓?涓???姹?瀛??涓轰?涔??

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

澶?绾跨?????绉?瀹??版?规?锛??芥??浠?涔????姝ユ????绉?瀹??版?规?锛??芥??浠?涔??

澶?绾跨???涓ょ?瀹??版?规?锛???????缁ф??hread绫讳?瀹???unnable?ュ??

??姝ョ??瀹??版?归?㈡??涓ょ?锛???????synchronized锛?wait涓?notify

绾跨????烘??姒?蹇点??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??冲??芥??涓?涓?绾跨?锛?涔?灏辨??绋?搴???韬???

Java涓???绾跨?????绉??舵????????锛?杩?琛???灏辩华????璧枫??缁?????

绠?杩伴?昏???浣?(&锛?|锛?^)涓??′欢??浣?(&&锛?||)???哄????

?哄??涓昏?绛?涓ょ?癸?a.?′欢??浣????芥??浣?甯?灏?????锛????昏???浣?涓?浠???浠ユ??浣?甯?灏???锛???涓???浠ユ??浣??板?煎??

b.?昏???浣?涓?浼?浜х????璺?

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

Java??杩??㈠??瀵硅薄???规?杩?琛?寮?甯稿???锛?????绉?涓?????寮?甯歌?琛???绫伙?骞舵??渚?浜???濂界???ュ?ｃ????ava涓?锛?姣?涓?寮?甯搁?芥??涓?涓?瀵硅薄锛?瀹???Throwable绫绘???跺??瀛?绫荤??瀹?渚???褰?涓?涓??规??虹?板?甯稿??渚挎???轰?涓?寮?甯稿?硅薄锛?璇ュ?硅薄涓???????寮?甯镐俊??锛?璋??ㄨ?涓?瀵硅薄???规???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?娈电?搴?锛?濡????虹?板?甯革?绯荤?浼????猴?throws锛?涓?涓?寮?甯革?杩??跺??浣???浠ラ??杩?瀹???绫诲???ユ????锛?catch锛?瀹?锛???????锛?finally锛??辩己??澶????ㄦ?ュ?????

??ry?ユ??瀹?涓???棰??叉??????寮?甯糕????绋?搴???绱ц???ry绋?搴??????搴?????涓?涓?catch瀛??ユ?ユ??瀹?浣??宠?????????寮?甯糕????绫诲????

throw璇??ョ?ㄦ?ユ??纭??版???轰?涓???寮?甯糕????

throws?ㄦ?ユ????涓?涓??????芥?板???芥???虹????绉???寮?甯糕????

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

??浠ュ?ㄤ?涓??????芥?拌??ㄧ??澶??㈠??涓?涓?try璇??ワ??ㄨ?涓??????芥?板???ㄥ?????涓?try璇??ヤ??ゅ?朵?浠ｇ????姣?褰????颁?涓?try璇??ワ???寮?甯糕????妗??跺氨?惧?板????涓?????村?版??????try璇??ラ?藉??????濡???涓?涓?绾х??try璇??ユ病??瀵规??绉???寮?甯糕??杩?琛?澶???锛?????灏变?灞?寮?锛??村?伴???版??澶???杩?绉???寮?甯糕????try璇??ャ??

涓?涓???.java??婧???浠朵腑??????浠ュ????澶?涓?绫伙?涓??????ㄧ被锛?锛???浠?涔????讹?

??浠ャ??蹇?椤诲????涓?涓?绫诲??涓???浠跺???稿????

java涓?????绉??规???浠ュ???颁?涓?绾跨?锛??ㄤ?涔??抽??瀛?淇?楗板??姝ユ?规?? stop()??suspend()?规?涓轰?涓??ㄨ??浣跨???

??涓ょ?瀹??版?规?锛???????缁ф??hread绫讳?瀹???unnable?ュ??

??ynchronized?抽??瀛?淇?楗板??姝ユ?规?

??瀵逛娇??top()锛?????涓哄??涓?瀹??ㄣ??瀹?浼?瑙ｉ?ょ?辩嚎绋??峰??????????瀹?锛???涓?濡???瀵硅薄澶?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()?规?瀹规??????姝婚????璋???uspend()???跺??锛?????绾跨?浼???涓??ワ?浣??翠??舵?????ㄨ?涔????峰?????瀹???姝ゆ?讹??朵?浠讳?绾跨??戒??借?块????瀹???璧?婧?锛??ら??琚?????璧封????绾跨??㈠?杩?琛???瀵逛换浣?绾跨??ヨ?达?濡???瀹?浠??虫?㈠?????绾跨?锛????跺??璇??句娇?ㄤ换浣?涓?涓???瀹???璧?婧?锛?灏变?????姝婚??????浠ヤ?搴?璇ヤ娇??uspend()锛???搴??ㄨ??宸辩??Thread绫讳腑缃??ヤ?涓???蹇?锛????虹嚎绋?搴?璇ユ椿?ㄨ?????璧枫???ユ??蹇????虹嚎绋?搴?璇ユ??璧凤?渚跨??ait()?藉?惰??ョ??寰??舵?????ユ??蹇????虹嚎绋?搴?褰??㈠?锛????ㄤ?涓?notify()???板???ㄧ嚎绋???

java涓?????绉?绫诲????娴?锛?JDK涓烘??绉?绫诲????娴???渚?浜?涓?浜??借薄绫讳互渚?缁ф?匡?璇疯?村?轰?浠?????????浜?绫伙?

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

java涓?瀹??板??????哄?舵??浠?涔?锛?

?规???????Overriding????杞?verloading??Java澶????х??涓???琛ㄧ?般??????Overriding???剁被涓?瀛?绫讳??村????х??涓?绉?琛ㄧ?帮???杞?verloading??涓?涓?绫讳腑澶????х??涓?绉?琛ㄧ?般??

???惧???跺?ㄧ???烘????????浠?涔?锛????惧???跺?ㄥ??浠ラ┈涓????跺??瀛???锛???浠?涔???娉?涓诲?ㄩ???ヨ?????鸿?琛????惧???讹?

瀵逛?GC?ヨ?达?褰?绋?搴?????寤哄?硅薄?讹?GC灏卞?濮????ц?涓?瀵硅薄???板????澶у?浠ュ??浣跨?ㄦ???点????甯革?GC???ㄦ?????剧???瑰?璁板???绠＄????(heap)涓???????瀵硅薄????杩?杩?绉??瑰?纭?瀹???浜?瀵硅薄??????杈剧????锛???浜?瀵硅薄????涓???杈剧??????褰?GC纭?瀹?涓?浜?瀵硅薄涓衡??涓???杈锯???讹?GC灏辨??璐ｄ换???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???

浠?涔???java搴?????锛?濡?浣?瀹???ava搴?????锛?

搴?????灏辨??涓?绉??ㄦ?ュ???瀵硅薄娴????哄?讹???璋?瀵硅薄娴?涔?灏辨??灏?瀵硅薄????瀹硅?琛?娴???????浠ュ?规???????瀵硅薄杩?琛?璇诲????浣?锛?涔???灏?娴???????瀵硅薄浼?杈?浜?缃?缁?涔??淬??搴???????涓轰?瑙ｅ?冲?ㄥ?瑰?硅薄娴?杩?琛?璇诲????浣??舵??寮???????棰???

搴???????瀹??帮?灏???瑕?琚?搴???????绫诲????erializable?ュ?ｏ?璇ユ?ュ?ｆ病????瑕?瀹??扮???规?锛?implements Serializable????涓轰???娉ㄨ?ュ?硅薄????琚?搴???????锛??跺??浣跨?ㄤ?涓?杈??烘?(濡?锛?FileOutputStream)?ユ????涓?涓?ObjectOutputStream(瀵硅薄娴?)瀵硅薄锛??ョ??锛?浣跨??bjectOutputStream瀵硅薄??writeObject(Object obj)?规?灏卞??浠ュ????颁负obj??瀵硅薄?????充?瀛??剁?舵??)锛?瑕??㈠???璇????ㄨ??ユ???

??AVA涓?锛?濡?浣?璺冲?哄?????澶???宓?濂?寰???锛?

??reak; return ?规???

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

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

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

??浠ョ户?垮?朵?绫绘??瀹????朵??ュ?ｏ???wing缂?绋?涓?甯哥?ㄦ?ゆ?瑰???

???ㄧ被??浠ュ??ㄤ?????绫荤????????锛???娌℃??浠?涔????讹?

涓?涓????ㄧ被瀵硅薄??浠ヨ?块????寤哄????澶??ㄧ被瀵硅薄????瀹?

jdbc璋??ㄦ?版??搴???姝ラ?わ?

??DBC?ュ???拌?块???版??搴?璁板???浠ラ???ㄤ??㈢????涓?姝ラ?わ?

1????杩?椹卞?ㄥ?ㄧ?＄???ㄨ?峰??杩??ユ?ュ?ｃ???

2????峰?Statement??瀹???瀛?绫汇???

3???????tatement涓??????般???

4????ц?Statement???

5????ョ??杩?????琛??版??????鸿???淬???

6????抽??Statement???

7???澶????跺????Statement?

8????抽??杩??ユ?ュ?ｃ???