红联Linux门户
Linux帮助
当前位置: 红联Linux门户 > Linux编程与内核

JAVA基础：从.class文件中寻找类名

发布时间:2006-11-22 00:36:23来源:红联作者:Heroop
可以有多种方式判断类的名字：

假定所有的类都以com，org，或者net开头
搜索classpath来寻找名字为Hack的类
搜索classpath来寻找映射到这个文件的目录入口
直接查看类自身。对于所有的情况下，这是最直接的
Java规范规定了如何查看一个class文件。存储在class文件一开始的一个值就是以Java内部分割符“/”为格式的完整的类明。

下面的代码返回了文件C:\code\hacks\research\com\generationjava\Hack.class的内部类名com/generationjava/Hack，读者可以进一步编写代码将“/”转换成“.”：

static final public int MAGIC = 0xCAFEBABE;
// 传递C:\code\hacks\research\com\generationjava\Hack.class
// 假定存在这样一个类
public String getFullyQualifiedName(String filename) throws IOException {
String name = null;

try {
DataInputStream in = new
DataInputStream(new FileInputStream(filename));
if(in.readInt() != MAGIC) {
// 不是一个.class文件
thrownew IOException("Not a class file");
}

in.readUnsignedShort();// 次版本号
in.readUnsignedShort();// 主版本号
in.readUnsignedShort();// 长度
in.readByte();// CLASS=7
in.readUnsignedShort();// 忽略这个地方
in.readByte();// UTF8=1
name =in.readUTF();//类的名字!!!
in.close();
} catch(IOException ioe) {
ioe.printStackTrace();
}

return name;
}
当你直接从.class文件中获得类的信息的时候，就简化了开发。查找一个匿名.class类文件的完整的类名是任何基于.class文件工作的应用的重要部件。
文章评论

共有 2709 条评论

  1. 0.0.0.* 于 2007-07-16 05:30:59发表:

    http://www.freewebs.com/poker-428/video-poker-8.html online videopoker online video poker gioca tavoli multigiocatori poker http://www.freewebs.com/poker-207/giochi-1.html internet blackjack online blackjack http://www.freewebs.com/casino-985/blackjack-2.html online blackjack internet blackjack http://www.freewebs.com/casino-598/blackjack-5.html internet video poker play video poker http://www.freewebs.com/poker-207/video-poker-1.html

  2. 203.177.104.* 于 2007-07-16 04:56:43发表:

    http://www.getaportal.com/portals/casino-816/tragaperra_1.html maquina tragaperras maquina tragaperras juego seguro portales juego seguro portales http://www.getaportal.com/portals/poker-75/juego_seguro_1.html online games http://www.freewebs.com/poker-419/giochi-3.html online games keno online http://www.bloglines.com/blog/casino-527?id=70 keno online casino slots casino slots http://www.bloglines.com/blog/casino-198?id=3

  3. 66.128.38.* 于 2007-07-16 04:55:19发表:

    http://www.freewebs.com/casino-598/slots-4.html casino slot online slots online slot machine http://www.freewebs.com/casino-574/slots-8.html online slot machine online roulette casino roulette http://www.freewebs.com/casino-182/roulette-6.html http://www.getaportal.com/portals/poker-9798/keno_02.html free online keno keno casino roulette online internet roulette http://www.freewebs.com/casino-511/roulette-8.html

  4. 0.0.0.* 于 2007-07-16 04:36:46发表:

    video keno free online keno http://www.freewebs.com/casino-987/keno-52.html online slot machine casino slot http://www.freewebs.com/casino-228/slots-8.html http://www.freewebs.com/poker-313/gioco-2.html stanze di gioco gioco gratuito http://www.getaportal.com/portals/poker-438/premio_dinero_1.html premio dinero linea premio dinero pagina internet vioxx recall vioxx recall http://www.vagleleiren.sandnes.no/odisk/_olopdisk/000003fe.htm

  5. 0.0.0.* 于 2007-07-16 04:28:38发表:

    http://www.quizilla.com/users/ringtone-90/journal/570983/ marilyn manson ringtone mosquito ringtone casinos gratuiro casino gratuito http://www.freewebs.com/casino-834/casino-5.html free ringtones free ringtones http://www.quizilla.com/users/ringtone-316/journal/572622/ http://www.freewebs.com/poker-161/online-poker-3.html poker on line poker online http://www.quizilla.com/users/ringtone-582/journal/570923/ free nokia ringtone free ringtone

  6. 72.177.133.* 于 2007-07-16 04:28:17发表:

    http://www.quizilla.com/users/ringtone-79/journal/572218/ free ringtone free cingular cell phone ringtone http://www.freewebs.com/casino-496/roulette-3.html internet roulette online roulette gioco online gioco online http://www.freewebs.com/poker-989/giochi-3.html craps online http://www.freewebs.com/casino-418/craps-5.html craps online black jack black jack http://www.freewebs.com/casino-598/blackjack-1.html

  7. 75.132.210.* 于 2007-07-16 04:17:21发表:

    tavoli multigiocatori poker http://www.freewebs.com/poker-979/giochi-6.html tavolo multigicotori poker drug rehab drug rehab http://www.technologyamerica.net/_discuss1/00001400.htm http://www.getaportal.com/portals/casino-340/pai_gow_1.html pai gow poker web pai gow poker paginas internet online casino http://www.getaportal.com/portals/poker-9798/casino_22.html online casino gambling tragaperras portales web maquina tragaperras http://www.getaportal.com/portals/poker-113/tragaperra_1.html

  8. 67.181.241.* 于 2007-07-16 04:09:04发表:

    http://www.freewebs.com/poker-719/giochi-1.html download giochi gioca software casino software casino http://www.freewebs.com/casino-387/casino-3.html casino in linea superiore casino in linea superiore http://www.freewebs.com/casino-182/casino-4.html http://www.freewebs.com/poker-818/giochi-1.html giochi giochi online carte gioco juego gratis pagina internet http://www.getaportal.com/portals/poker-438/juego_gratis_1.html juego gratis portales

  9. 12.218.226.* 于 2007-07-16 03:52:03发表:

    free ringtone ringtone http://www.quizilla.com/users/ringtone-695/journal/570954/ craps online craps rules http://www.getaportal.com/portals/poker-3863/craps_32.html free ringtones http://www.quizilla.com/users/ringtone-135/journal/572703/ free ringtones ringtones ringtones http://www.quizilla.com/users/ringtone-488/journal/570867/ http://www.getaportal.com/portals/poker-982/juego_interactivo_1.html juego interactivo online juego interactivo pagina web

  10. 0.0.0.* 于 2007-07-16 03:47:52发表:

    casino gaming casino gaming http://www.getaportal.com/portals/casino-2877/casino_31.html ganar dinero internet http://www.getaportal.com/portals/poker-982/ganar_dinero_1.html ganar dinero verdadero portal giochi on line gioca http://www.freewebs.com/poker-161/giochi-5.html casino in linea migliore web casino http://www.freewebs.com/casino-228/casino-6.html strategia crap http://www.freewebs.com/casino-837/craps-1.html strategia crap

  11. 0.0.0.* 于 2007-07-16 03:33:20发表:

    http://www.getaportal.com/portals/casino-759/casino_internacional_1.html casino internacional pagina web casino internacional pagina web http://www.quizilla.com/users/ringtone-126/journal/572209/ free motorola ringtone free ringtone casino poker casino poker http://www.freewebs.com/poker-110/poker-1.html http://www.freewebs.com/casino-591/slots-2.html casino slots online slot machine http://www.getaportal.com/portals/casino-487/casinos_espana_1.html casinos espanol casinos espana portal

  12. 219.239.227.* 于 2007-07-16 03:28:29发表:

    casino gioca http://www.freewebs.com/casino-228/casino-game-4.html casino games keno casino keno online http://www.freewebs.com/casino-379/keno-31.html http://www.freewebs.com/casino-162/craps-2.html strategia crap strategie crap free cingular ringtone ringtone http://www.quizilla.com/users/ringtone-555/journal/572436/ cingular ringtone ringtones http://www.quizilla.com/users/ringtone-90/journal/571111/

  13. 203.167.76.* 于 2007-07-16 03:23:53发表:

    online video poker online video poker http://www.freewebs.com/poker-656/video-poker-3.html premio dinero online premio dinero pagina internet http://www.getaportal.com/portals/casino-79/premio_dinero_1.html regola baccarat regole baccarat http://www.freewebs.com/poker-507/baccarat-2.html tavoli multigiocatori poker tavoli multigiocatori poker http://www.freewebs.com/poker-719/giochi-3.html http://www.getaportal.com/portals/poker-338/pai_gow_1.html pai gow poker paginas web pai gow poker pagina web

  14. 130.39.11.* 于 2007-07-16 03:23:32发表:

    craps online craps online http://www.freewebs.com/casino-987/craps-42.html free online roulette free online roulette http://www.bloglines.com/blog/casino-527?id=68 free sprint ringtones free sprint ringtones http://www.quizilla.com/users/ringtone-24/journal/570804/ caribbean poker pagina web caribbean poker pagina internet http://www.getaportal.com/portals/poker-914/caribbean_poker_1.html 100 free ringtones free alltel ringtones http://www.quizilla.com/users/ringtone-135/journal/572570/

  15. 75.108.104.* 于 2007-07-16 03:07:08发表:

    caribbean poker paginas web http://www.getaportal.com/portals/casino-241/caribbean_poker_1.html poker caribe online download free ringtones free cell phone ringtones http://www.quizilla.com/users/ringtone-488/journal/570854/ strategia crap http://www.freewebs.com/casino-606/craps-2.html regole crap http://www.freewebs.com/poker-806/video-poker-8.html internet videopoker internet videopoker http://www.freewebs.com/poker-734/online-poker-3.html poker online poker on line

  16. 0.0.0.* 于 2007-07-16 03:01:00发表:

    casino internacional linea casinos internacionales linea http://www.getaportal.com/portals/poker-287/casino_internacional_1.html casino slots internet slot http://www.freewebs.com/casino-591/slots-6.html casino espana free casino http://www.getaportal.com/portals/poker-880/casino_1.html http://www.freewebs.com/casino-244/craps-7.html strategie crap strategie crap regole baccarat http://www.freewebs.com/poker-656/baccarat-9.html regole baccarat

  17. 0.0.0.* 于 2007-07-16 02:59:17发表:

    free nokia ringtone download free ringtone http://www.quizilla.com/users/ringtone-167/journal/570667/ http://www.freewebs.com/poker-603/gioco-6.html gioco gratuito stanze di gioco migliori blackjack game online blackjack http://www.freewebs.com/casino-418/blackjack-4.html http://www.freewebs.com/poker-191/gioco-5.html gioco gratuito gioco in linea http://www.freewebs.com/poker-818/poker-7.html chips di poker poker games

  18. 69.125.166.* 于 2007-07-16 02:32:11发表:

    blackjack game http://www.freewebs.com/casino-398/blackjack-3.html online blackjack encuentros poker http://www.getaportal.com/portals/casino-328/poker_1.html poker table blackjack gambling play blackjack http://www.freewebs.com/casino-987/blackjack-72.html http://www.freewebs.com/poker-313/baccarat-2.html regola baccarat regole baccarat http://www.getaportal.com/portals/poker-982/poker_game_1.html poker game download computer poker game

  19. 90.189.128.* 于 2007-07-16 02:19:47发表:

    strategie crap regole crap http://www.freewebs.com/casino-606/craps-5.html http://www.freewebs.com/casino-598/casino-7.html virtual casino internet casino tavoli multigiocatori poker giochi internet http://www.freewebs.com/poker-161/giochi-6.html http://www.quizilla.com/users/ringtone-167/journal/570730/ polyphonic ringtones selena ringtones black eyed pea ringtones http://www.quizilla.com/users/ringtone-79/journal/572827/ nextel ringtone

  20. 69.47.145.* 于 2007-07-16 02:16:03发表:

    roulette on line http://www.freewebs.com/casino-387/roulette-3.html online roulette online poker tournament online poker tournament http://www.freewebs.com/poker-719/poker-1.html cell phone ringtone celtic frost ringtone http://www.quizilla.com/users/ringtone-167/journal/570680/ http://www.freewebs.com/poker-82/online-poker-3.html online poker game play poker online ringtones ringtones http://www.quizilla.com/users/ringtone-106/journal/572797/

  21. 196.32.128.* 于 2007-07-16 01:21:24发表:

    gambling poker http://www.freewebs.com/poker-419/poker-9.html gambling poker casino in linea superiore internet casino http://www.freewebs.com/casino-598/casino-2.html free ringtones http://www.quizilla.com/users/ringtone-555/journal/572535/ free alltel ringtones casino virtual paginas web casino pagina web http://www.getaportal.com/portals/poker-914/casino_pagina_1.html internet casino http://www.freewebs.com/casino-672/casino-3.html software casino

  22. 68.72.35.* 于 2007-07-16 01:07:32发表:

    giochi on line http://www.freewebs.com/poker-313/giochi-2.html giochi carte online online slot machine http://www.freewebs.com/casino-228/slots-1.html internet slots http://www.quizilla.com/users/ringtone-167/journal/570681/ ringtone cell phone ringtone casinos games casino gioca http://www.freewebs.com/casino-978/casino-game-1.html online poker game http://www.freewebs.com/poker-989/online-poker-6.html play poker online

  23. 58.30.18.* 于 2007-07-16 01:01:33发表:

    http://www.freewebs.com/casino-837/craps-4.html strategia crap craps online juegos apuestas paginas web jugar apostar paginas internet http://www.getaportal.com/portals/poker-113/juegos_apuestas_1.html gambling poker http://www.freewebs.com/poker-419/poker-1.html internet poker gioco poker giocare poker http://www.freewebs.com/poker-419/poker-6.html poker online http://www.freewebs.com/poker-82/online-poker-7.html poker on line

  24. 0.0.0.* 于 2007-07-15 23:44:47发表:

    play video poker online videopoker http://www.freewebs.com/poker-191/video-poker-8.html http://www.freewebs.com/casino-162/blackjack-8.html blackjack game online blackjack http://www.getaportal.com/portals/poker-998/juego_al_instante_1.html juego al instante portal juego al instante pagina internet juegos de azar juegos azar paginas internet http://www.getaportal.com/portals/poker-160/juegos_azar_1.html http://www.quizilla.com/users/ringtone-167/journal/570726/ free cingular ringtones free sprint ringtones

  25. 203.162.27.* 于 2007-07-15 23:07:05发表:

    casino virtual paginas web http://www.getaportal.com/portals/poker-168/casino_pagina_1.html casino virtual paginas web poker online poker on line http://www.freewebs.com/poker-558/online-poker-7.html casinos espana paginas internet casinos espana paginas internet http://www.getaportal.com/portals/casino-585/casinos_espana_1.html http://www.quizilla.com/users/ringtone-90/journal/571045/ free verizon ringtones free ringtones maquinas tragaperras linea maquina tragaperras paginas internet http://www.getaportal.com/portals/casino-863/maquinas_tragaperras_1.html

  26. 200.13.163.* 于 2007-07-15 23:06:46发表:

    free casino slots http://www.freewebs.com/casino-987/slots-62.html progressive slots casinos espana paginas internet http://www.getaportal.com/portals/poker-94/casinos_espana_1.html casinos espana pagina internet casinos espana portales casinos espana portales http://www.getaportal.com/portals/casino-392/casinos_espana_1.html internet roulette http://www.freewebs.com/casino-418/roulette-5.html roulette online juego poquer poquer web http://www.getaportal.com/portals/poker-241/poquer_1.html

  27. 76.171.16.* 于 2007-07-15 23:06:09发表:

    http://www.getaportal.com/portals/poker-918/spiel_6.html multispieler spiele spiel erlebnis roulette online casino roulette http://www.freewebs.com/casino-606/roulette-8.html online roulette game http://www.getaportal.com/portals/poker-9798/roulette_22.html free roulette game free nokia ringtones download free ringtones http://www.quizilla.com/users/ringtone-555/journal/572591/ http://www.quizilla.com/users/ringtone-79/journal/572380/ nextel ringtone lil wayne ringtone

  28. 72.240.91.* 于 2007-07-15 23:05:29发表:

    http://www.freewebs.com/poker-82/giochi-3.html gioca gioca juego gratis portal web juego gratis portal http://www.getaportal.com/portals/poker-800/juego_gratis_1.html ganar premio web ganar premio web http://www.getaportal.com/portals/casino-633/ganar_premio_1.html free ringtones http://www.quizilla.com/users/ringtone-167/journal/570700/ download free cingular ringtones http://www.quizilla.com/users/ringtone-67/journal/572418/ download ringtone download ringtone

  29. 140.127.187.* 于 2007-07-15 23:04:20发表:

    http://www.bloglines.com/blog/casino-527?id=62 craps rules casino craps maquina tragaperras online maquina tragaperras online http://www.getaportal.com/portals/casino-41/tragaperra_1.html madonna ringtone download ringtone http://www.quizilla.com/users/ringtone-79/journal/572368/ giochi giochi online gioca http://www.freewebs.com/poker-549/giochi-9.html play poker online online poker game http://www.freewebs.com/poker-191/online-poker-6.html

  30. 203.168.164.* 于 2007-07-15 22:30:02发表:

    free ringtone free virgin mobile ringtone http://www.quizilla.com/users/ringtone-167/journal/570668/ jugar video poker http://www.getaportal.com/portals/poker-914/video_poker_1.html jugar video poker casino in linea migliore http://www.freewebs.com/casino-591/casino-4.html software casino black eyed pea ringtone ringtone http://www.quizilla.com/users/ringtone-695/journal/570982/ http://www.freewebs.com/casino-674/slots-2.html online slots casino slot

  31. 24.166.145.* 于 2007-07-15 20:33:44发表:

    internet roulette http://www.freewebs.com/casino-672/roulette-2.html casino roulette http://www.getaportal.com/portals/poker-696/casino_pagina_1.html casino pagina internet casino virtual pagina internet free ringtones 100 free ringtones http://www.quizilla.com/users/ringtone-927/journal/572648/ http://www.quizilla.com/users/ringtone-695/journal/571012/ free virgin mobile ringtones 100 free ringtones casino du liban casino slot http://www.getaportal.com/portals/casino-137/casino_1.html

  32. 0.0.0.* 于 2007-07-15 20:32:16发表:

    ringtones download free ringtone http://www.quizilla.com/users/ringtone-695/journal/571088/ casinos internacionales pagina web http://www.getaportal.com/portals/poker-94/casino_internacional_1.html casino internacional web ganar premio linea ganar premios internet http://www.getaportal.com/portals/casino-585/ganar_premio_1.html casino internacional portales casino internacional paginas internet http://www.getaportal.com/portals/poker-216/casino_internacional_1.html http://www.freewebs.com/casino-834/casino-game-7.html casino games giochi casino

  33. 209.200.52.* 于 2007-07-15 20:25:25发表:

    http://www.quizilla.com/users/ringtone-928/journal/571086/ cingular ringtone ringtones download free ringtones download free verizon ringtones http://www.quizilla.com/users/ringtone-695/journal/571032/ multiplayer poker game http://www.getaportal.com/portals/casino-759/poker_game_1.html poker game online casinos descargas portal internet http://www.getaportal.com/portals/poker-216/casino_descargas_1.html casinos descargas portales web regole crap strategie crap http://www.freewebs.com/casino-591/craps-1.html

  34. 0.0.0.* 于 2007-07-15 20:15:28发表:

    giochi online giochi online http://www.freewebs.com/poker-979/giochi-2.html casinos descargas portal casinos descargas pagina internet http://www.getaportal.com/portals/casino-79/casino_descargas_1.html juego seguro portal http://www.getaportal.com/portals/poker-410/juego_seguro_1.html juego seguro linea juego gratis pagina web jugar gratis portal http://www.getaportal.com/portals/poker-216/juego_gratis_1.html download free ringtone download free ringtone http://www.quizilla.com/users/ringtone-106/journal/572381/

  35. 71.60.30.* 于 2007-07-15 20:13:33发表:

    http://www.freewebs.com/casino-244/craps-6.html regole crap strategia crap download giochi giochi carte online http://www.freewebs.com/poker-313/giochi-5.html http://www.freewebs.com/casino-418/slots-4.html internet slot internet slot casino gaming casino gioca http://www.freewebs.com/casino-591/casino-game-4.html ganar dinero verdadero pagina internet ganar dinero internet http://www.getaportal.com/portals/casino-41/ganar_dinero_1.html

  36. 69.211.148.* 于 2007-07-15 20:07:33发表:

    weight loss drug weight loss drug http://www.sftyeeclub.com/fishTalk/_fishTalesDisc/0000004e.htm free ringtone download free cingular ringtone http://www.quizilla.com/users/ringtone-24/journal/570773/ premios dinero internet http://www.getaportal.com/portals/poker-880/premio_dinero_1.html premios dinero internet play keno online play keno online http://www.freewebs.com/casino-987/keno-02.html stanze di gioco gioco gratuito http://www.freewebs.com/poker-110/gioco-4.html

  37. 219.71.242.* 于 2007-07-15 19:57:59发表:

    http://www.getaportal.com/portals/poker-914/maquinas_tragaperras_1.html maquina tragaperras pagina web maquinas tragaperras pagina internet free roulette online roulette game http://www.getaportal.com/portals/casino-2877/roulette_31.html free roulette game free roulette http://www.freewebs.com/casino-987/roulette-62.html craps online regola crap http://www.freewebs.com/casino-978/craps-4.html casino gioca http://www.freewebs.com/casino-387/casino-game-2.html casino games

  38. 0.0.0.* 于 2007-07-15 19:51:45发表:

    internet video poker http://www.freewebs.com/poker-207/video-poker-4.html internet videopoker casinosvirtuales casino du liban http://www.getaportal.com/portals/poker-113/casino_1.html internet slot machine http://www.freewebs.com/casino-834/slots-2.html online slots http://www.freewebs.com/poker-656/online-poker-2.html online poker game play poker online http://www.getaportal.com/portals/poker-995/juego_1.html juegos descarga jugar cartas web

  39. 0.0.0.* 于 2007-07-15 19:49:22发表:

    black eyed pea ringtones download free ringtones http://www.quizilla.com/users/ringtone-24/journal/570821/ juego poquer jugar poquer internet http://www.getaportal.com/portals/poker-926/poquer_1.html gioca giocare http://www.freewebs.com/poker-603/giochi-2.html free real ringtone download free cingular ringtone http://www.quizilla.com/users/ringtone-869/journal/572301/ casino gioca http://www.freewebs.com/casino-182/casino-game-7.html casino gaming

  40. 80.67.241.* 于 2007-07-15 19:49:02发表:

    http://www.freewebs.com/poker-818/video-poker-6.html internet video poker play video poker casinos http://www.freewebs.com/casino-228/casino-4.html casinos http://www.quizilla.com/users/ringtone-67/journal/572306/ free ringtone free polyphonic ringtone http://www.freewebs.com/casino-591/blackjack-5.html play blackjack blackjack game beatles ringtone http://www.quizilla.com/users/ringtone-79/journal/572453/ free ringtone

  1. 锟斤拷页锟斤拷一页 9 10 11 12 13 锟斤拷一页 尾页

频道文章

最新教程

随机推荐

关于我们 | 合作 | 联系我们

© linuxdiyf.com 红联Linux门户 版权所有