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. 72.36.192.* 于 2007-06-25 18:23:12发表:

    Great work!
    new free money online casinos | casinos online | on line gambling | holdem poker | free on line slots | free casino games online | strip blackjack games | online free roulette | free casino cash | free on line poker

  2. 72.36.192.* 于 2007-06-25 18:22:48发表:

    Good design!
    no deposit casino bonus | slot machines games | no deposit bonus | casino free games | internet casino games | free poker | slot machines | black jack | free casino games | online baccarat

  3. 72.36.192.* 于 2007-06-25 18:22:35发表:

    Good design!
    online poker games | flash casinos | monopoly slot machine | play blackjack online | texas hold em | online slots free | games download | free poker download | 3 card poker | gambling sites

  4. 24.62.142.* 于 2007-06-25 12:49:35发表:

    No matter 888 pacific poker

  5. 69.124.215.* 于 2007-06-25 12:39:17发表:

    casino slots casino bonus http://www.freewebs.com/casino-87/casino-7.html casino gaming casino gaming http://www.freewebs.com/casino-68/casino-7.html online craps http://www.freewebs.com/casino-76/craps-4.html online craps http://www.freewebs.com/casino-87/craps-7.html play craps online free gambling craps quick payday loan http://sg3018.k12.sd.us/_disc1/0000003d.htm quick payday loan

  6. 0.0.0.* 于 2007-06-25 12:39:06发表:

    payday loan personal http://www.painareas.com/_disc1/0000011a.htm payday loan personal no faxing payday loan http://applesoranges.us/videos/_disc22/000000da.htm no faxing payday loan http://www.freewebs.com/casino-78/craps-4.html free craps game online craps ameriloan payday loan http://www.kore.negros.ph/_forum/00000c9a.htm ameriloan payday loan http://www.freewebs.com/casino-44/slots-7.html play slots slots machine game

  7. 24.79.236.* 于 2007-06-25 11:42:00发表:

    If texas hold em poker online

  8. 0.0.0.* 于 2007-06-25 11:39:48发表:

    In other words party poker bonus code

  9. 222.124.197.* 于 2007-06-25 11:29:08发表:

    Commonly online free poker

  10. 24.19.69.* 于 2007-06-25 11:15:17发表:

    At the beggining party poker cheat

  11. 0.0.0.* 于 2007-06-25 11:08:37发表:

    Breathe free video poker games

  12. 72.36.192.* 于 2007-06-24 18:38:08发表:

    Good design!
    sony ericsson ringtones | boost mobile ringtones | free mp3 ringtones | 24 ctu ringtones | free downloadable t mobile ringtones | free ringtones for tracfone | t mobile ringtones | ctu ringtone | free t mobile ringtones | u s cellular ringtones

  13. 72.36.192.* 于 2007-06-24 18:37:42发表:

    Good design!
    24 ring tone | free ringtones for u s cellular | star wars ringtone | free ringtones verizon | ringtone midi | christian music ringtones | ringtones midi | 24 ringtone | ctu 24 ringtone | download ringtones

  14. 72.36.192.* 于 2007-06-24 18:36:46发表:

    Great work!
    nextel downloads | free nextel downloads | free polyphonic ringtone download | centennial ringtones | simpsons ringtone | free real ringtones for cingular | mosquito ringtone | verizon ringtones free | tmobile ringtones | verizon free ringtones

  15. 72.36.192.* 于 2007-06-24 18:36:21发表:

    Nice site!
    free sprint downloads | suncom ringtones | free ringtone downloads | sanyo ringtones | free mobile phone ringtones | sprint phones | free phone ringtones | free mp3 download | free harry potter ringtones | ringtones for alltel

  16. 72.36.192.* 于 2007-06-24 18:36:10发表:

    Thank you!
    motorola ring tones | cellular south ringtones | mp3 ringtone download | free polyphonic ringtones | arabic ringtones | motorola ringtone | mp3 ringtone converter | free anime | free kyocera ringtones | hifi ringtones

  17. 204.48.128.* 于 2007-06-23 18:53:51发表:

    fast payday loan http://www.ideeimpegno.it/_disc1/000005c9.htm fast payday loan http://www.sonnymcleans.com/_disc17/0000670d.htm instant faxless payday loan instant faxless payday loan fast cash payday loan fast cash payday loan http://www.sandycreekconservancy.com/SCIForum/000000a2.htm online casino roulette casino roulette http://www.freewebs.com/casino-68/roulette-2.html payday loan company http://www.copysoft.net/_disc1/00000d61.htm payday loan company

  18. 72.36.192.* 于 2007-06-23 18:26:23发表:

    Good design!
    games online | poker sites | free texas hold em | online slots | free online slot machines | free slots download | free online slots games | free online blackjack | free online casinos | free slots machines

  19. 72.36.192.* 于 2007-06-23 18:25:56发表:

    Thank you!
    poker free | flash casino games | on line poker | free video slots | black jack download | free online black jack | play casino games | free casino slot games | online poker sites | poker for free

  20. 72.36.192.* 于 2007-06-23 18:24:52发表:

    Nice site!
    poker stars | internet gambling | poker websites | free poker games | free bonus slots | free online poker | slot games free | free casino bonus | new free money online casinos | games on line

  21. 72.36.192.* 于 2007-06-23 18:24:28发表:

    Good design!
    casino on line | cleopatra slot machine | online roulette game | new no deposit casinos | free slots game | free slot machine games | online poker usa | play poker for free | free black jack game | free video poker

  22. 72.36.192.* 于 2007-06-23 18:24:17发表:

    Great work!
    party poker | roulette free games | free slots for fun | casinos online | slots free | slot machine | 3 card poker | casino slots | no download casino | video slot games

  23. 67.49.221.* 于 2007-06-23 18:20:27发表:

    military payday loan military payday loan http://www.globalduk.com/_disc1/00000265.htm http://ss3054.k12.sd.us/_disc1/00000040.htm same day payday loan same day payday loan same day payday loan same day payday loan http://www.iaap-satellite.org/_disc1/00001120.htm internet roulette http://www.freewebs.com/casino-44/roulette-5.html internet roulette same day payday loan same day payday loan http://huntersvalley.net/_bulletinboard/00000437.htm

  24. 0.0.0.* 于 2007-06-23 18:20:17发表:

    military payday loan military payday loan http://www.globalduk.com/_disc1/00000265.htm http://ss3054.k12.sd.us/_disc1/00000040.htm same day payday loan same day payday loan same day payday loan same day payday loan http://www.iaap-satellite.org/_disc1/00001120.htm internet roulette http://www.freewebs.com/casino-44/roulette-5.html internet roulette same day payday loan same day payday loan http://huntersvalley.net/_bulletinboard/00000437.htm

  25. 76.190.250.* 于 2007-06-23 18:18:17发表:

    http://www.mby2.com/_cusudi/0000004c.htm cash advance paydayloans cash advance paydayloans casino baccarat baccarat online http://www.freewebs.com/casino-45/baccarat-5.html free online slots http://www.freewebs.com/casino-44/slots-2.html online casino slots blackjack gambling free online blackjack http://www.freewebs.com/casino-13/blackjack-1.html money tree payday loan http://www.polishnetwork.com/polishnetwork/_disc1/000034b7.htm money tree payday loan

  26. 0.0.0.* 于 2007-06-23 18:11:12发表:

    military payday loan military payday loan http://www.connselmerstrike.com/_HArticles/00000044.htm http://www.freewebs.com/casino-68/roulette-5.html free roulette game play free roulette online roulette gambling play free roulette http://www.freewebs.com/casino-45/roulette-3.html casino baccarat casino baccarat http://www.freewebs.com/casino-66/baccarat-7.html http://www.freewebs.com/casino-13/blackjack-4.html free blackjack free online blackjack

  27. 0.0.0.* 于 2007-06-23 17:48:37发表:

    http://members.tripod.com/branhamhighforum/_disc13/00000415.htm no teletrack payday loan no teletrack payday loan keno online free keno http://www.freewebs.com/casino-87/keno-6.html no credit check payday loan no credit check payday loan http://www.pfm.com.hk/_disc4/00002c50.htm easy payday loan easy payday loan http://www.packroute.com/forum/_disc6/000008ec.htm http://www.freewebs.com/casino-66/blackjack-5.html casino blackjack internet blackjack

  28. 0.0.0.* 于 2007-06-23 16:19:11发表:

    online roulette gambling free roulette http://www.freewebs.com/casino-13/roulette-2.html online casino slots online casino slots http://www.freewebs.com/casino-68/slots-7.html http://www.brahman.co.za/Discussion/_disc2/00002392.htm military payday loan military payday loan free online keno http://www.freewebs.com/casino-66/keno-7.html video keno loan til payday http://www.allfearless.com/timinator/longmont/_disc1/00001482.htm loan til payday

  29. 218.38.13.* 于 2007-06-23 16:19:00发表:

    no faxing payday loan no faxing payday loan http://www.essex.ac.uk/afm/ma-discuss/_afm-ma-discuss/000009ff.htm fast cash payday loan fast cash payday loan http://www.peter-buswell.com/TheGreatConspiracy/00000c81.htm http://www.freewebs.com/casino-31/casino-6.html free casino game casino gaming online casino slots http://www.freewebs.com/casino-31/slots-2.html online slots machine casino baccarat online baccarat http://www.freewebs.com/casino-89/baccarat-5.html

  30. 0.0.0.* 于 2007-06-23 16:16:00发表:

    payday loan payday loan http://abram4obama.com/Obama/00000002.htm payday loan store http://www.mby2.com/_cusudi/0000004b.htm payday loan store http://www.freewebs.com/casino-76/roulette-5.html free roulette online roulette http://www.freewebs.com/casino-87/slots-7.html online slots machine free slots machine free baccarat http://www.freewebs.com/casino-87/baccarat-3.html free baccarat

  31. 121.177.244.* 于 2007-06-23 15:11:37发表:

    http://www.freewebs.com/casino-53/roulette-2.html online roulette online roulette http://www.ssc.com.kw/DB/_disc1/00003d5b.htm quik payday loan quik payday loan online casino gambling online casino gambling http://www.freewebs.com/casino-76/casino-1.html cheap payday loan cheap payday loan http://www.kawiswaradharma.org/forum/000000ba.htm payday loan http://www.alessiamore.it/file%20nascosti/_disc10/00000257.htm payday loan

  32. 0.0.0.* 于 2007-06-23 14:41:24发表:

    http://clubmobil.at/_gaeste/00001a1e.htm ameriloan payday loan ameriloan payday loan instant faxless payday loan instant faxless payday loan http://www.arbor-inc.biz/_disc9/000000ed.htm http://www.haircountry.com/_forum/00001fbb.htm payday loan payday loan http://www.freewebs.com/casino-13/casino-5.html online casino vegas casino fast cash payday loan http://www.kawiswaradharma.org/forum/000000b8.htm fast cash payday loan

  33. 202.164.165.* 于 2007-06-23 14:12:41发表:

    low fee payday loan low fee payday loan http://www.theashlandsaints.com/Saints/0000005b.htm casino baccarat baccarat game http://www.freewebs.com/casino-76/baccarat-5.html casino bonus casino game http://www.freewebs.com/casino-45/casino-1.html blogspot.com loan payday site http://www.cancerwithgod.com/_cancer/000000dd.htm blogspot.com loan payday site online slots online slots machine http://www.freewebs.com/casino-13/slots-1.html

  34. 0.0.0.* 于 2007-06-23 13:49:27发表:

    internet keno http://www.freewebs.com/casino-53/keno-7.html keno online play blackjack online blackjack card game http://www.freewebs.com/casino-13/blackjack-7.html free online blackjack online blackjack http://www.freewebs.com/casino-68/blackjack-3.html video slots play free slots machine http://www.freewebs.com/casino-31/slots-4.html http://www.denormalization.com/BLOG/Discussions/00000060.htm low fee payday loan low fee payday loan

  35. 0.0.0.* 于 2007-06-23 13:34:02发表:

    http://www.freewebs.com/casino-66/casino-5.html las vegas casino free casino games payday cash advance payday cash advance http://www.bioyma.com/_truehearts/_disc1/000000b2.htm roulette game online roulette game http://www.freewebs.com/casino-45/roulette-1.html fax payday loan fax payday loan http://www.goodfelloweb.com/cottage/_disc1/00000c37.htm quik payday loan quik payday loan http://tuvc.com/tech/_disc11/00000042.htm

  36. 162.8.231.* 于 2007-06-23 13:03:22发表:

    jack black free blackjack http://www.freewebs.com/casino-44/blackjack-3.html payday loan store http://www.rebbook.com/_disc1/000003fa.htm payday loan store http://www.whichsideofthefence.com/_disc7/00000079.htm payday loan 1000 payday loan 1000 blackjack gambling blackjack odds http://www.freewebs.com/casino-97/blackjack-1.html fax payday loan http://www.tourdepub.com/_smack/00001211.htm fax payday loan

  37. 70.244.169.* 于 2007-06-23 13:02:54发表:

    http://www.niles-hs.k12.il.us/heaing/_51-75/00003ece.htm instant faxless payday loan instant faxless payday loan play blackjack online online casino blackjack http://www.freewebs.com/casino-97/blackjack-7.html 7 card stud 7 card stud http://www.freewebs.com/casino-82/card-stud-3.html payday cash advance http://kreacom.com/_scd1/000000b1.htm payday cash advance http://www.mcap.ms/_mcap1/0000007e.htm instant payday loan instant payday loan

  38. 67.189.178.* 于 2007-06-23 13:02:07发表:

    http://www.niles-hs.k12.il.us/heaing/_51-75/00003ece.htm instant faxless payday loan instant faxless payday loan play blackjack online online casino blackjack http://www.freewebs.com/casino-97/blackjack-7.html 7 card stud 7 card stud http://www.freewebs.com/casino-82/card-stud-3.html payday cash advance http://kreacom.com/_scd1/000000b1.htm payday cash advance http://www.mcap.ms/_mcap1/0000007e.htm instant payday loan instant payday loan

  39. 70.126.61.* 于 2007-06-23 12:58:24发表:

    seven card stud seven card stud http://www.freewebs.com/casino-66/card-stud-7.html payday loan on line payday loan on line http://tuvc.com/tech/_disc11/00000043.htm http://nc-code.com/_disc2/000007bc.htm blogspot.com loan payday site blogspot.com loan payday site payday advance loan payday advance loan http://www.fairview66.com/Data2/00000053.htm casino baccarat online baccarat http://www.freewebs.com/casino-13/baccarat-1.html

  40. 75.152.148.* 于 2007-06-23 12:35:39发表:

    http://www.freewebs.com/casino-78/card-stud-3.html seven card stud 7 card stud http://www.freewebs.com/casino-87/craps-2.html craps online rules of craps no fax payday loan no fax payday loan http://www.domeoverride.com/_disc1/00001df5.htm free online slots sim slots http://www.freewebs.com/casino-66/slots-2.html http://abram4obama.com/Obama/00000004.htm fax payday loan fax payday loan

  1. 首页上一页 38 39 40 41 42 下一页 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