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 2007-07-14 18:49:20发表:

    free slots machine game http://www.bloglines.com/blog/casino-198?id=45 video slots how to play craps how to play craps http://www.bloglines.com/blog/casino-198?id=27 free blackjack http://www.freewebs.com/casino-379/blackjack-61.html jack black casino gaming online casino http://www.bloglines.com/blog/casino-198?id=36 http://www.bloglines.com/blog/casino-527?id=26 free online roulette internet roulette

  2. 58.98.97.* 于 2007-07-14 18:42:48发表:

    casino blackjack play blackjack online free http://www.freewebs.com/casino-987/blackjack-22.html roulette gambling roulette casino game http://www.getaportal.com/portals/casino-2877/roulette_01.html internet blackjack blackjack gambling http://www.freewebs.com/casino-987/blackjack-42.html online keno http://www.bloglines.com/blog/casino-198?id=14 keno online play keno online free keno games http://www.getaportal.com/portals/poker-3863/keno_22.html

  3. 0.0.0.* 于 2007-07-14 18:42:00发表:

    online casino blackjack play blackjack online http://www.bloglines.com/blog/casino-527?id=16 http://www.bloglines.com/blog/casino-198?id=17 free slots slots online las vegas casino http://www.freewebs.com/casino-987/casino-12.html vegas casino http://www.bloglines.com/blog/casino-198?id=48 online craps play craps http://www.freewebs.com/casino-987/slots-62.html free online slots progressive slots

  4. 213.171.96.* 于 2007-07-14 18:39:47发表:

    play free roulette free roulette game http://www.bloglines.com/blog/casino-527?id=61 play blackjack online http://www.getaportal.com/portals/poker-3863/blackjack_12.html free blackjack play baccarat free baccarat http://www.bloglines.com/blog/casino-527?id=32 free keno http://www.getaportal.com/portals/poker-9798/keno_32.html play keno online free online slots free online slots http://www.getaportal.com/portals/casino-2877/slots_21.html

  5. 0.0.0.* 于 2007-07-14 18:21:03发表:

    play free blackjack http://www.bloglines.com/blog/casino-198?id=16 play blackjack online casino baccarat free online baccarat http://www.getaportal.com/portals/poker-3863/baccarat_02.html http://www.freewebs.com/casino-379/baccarat-31.html online baccarat baccarat game free slots machine game http://www.bloglines.com/blog/casino-527?id=45 progressive slots casino slots online slots machine http://www.freewebs.com/casino-379/slots-31.html

  6. 218.92.191.* 于 2007-07-14 18:18:13发表:

    play keno online http://www.getaportal.com/portals/casino-2877/keno_01.html play keno online casino baccarat http://www.bloglines.com/blog/casino-198?id=11 free online baccarat online keno http://www.freewebs.com/casino-379/keno-91.html online keno http://www.bloglines.com/blog/casino-527?id=10 free casino slots play slots internet roulette online roulette gambling http://www.freewebs.com/casino-379/roulette-51.html

  7. 212.0.126.* 于 2007-07-14 18:17:43发表:

    free online baccarat play baccarat http://www.bloglines.com/blog/casino-198?id=32 roulette casino game http://www.getaportal.com/portals/poker-9798/roulette_32.html casino roulette http://www.bloglines.com/blog/casino-527?id=68 free roulette free roulette blackjack gambling http://www.bloglines.com/blog/casino-527?id=37 blackjack game play craps free craps http://www.getaportal.com/portals/casino-1639/craps_31.html

  8. 198.30.120.* 于 2007-07-14 18:16:45发表:

    slots game free slots game http://www.freewebs.com/casino-987/slots-32.html online casino blackjack play blackjack online free http://www.bloglines.com/blog/casino-198?id=23 http://www.freewebs.com/casino-987/keno-22.html free keno keno online http://www.freewebs.com/casino-379/slots-71.html free casino slots free casino slots http://www.freewebs.com/casino-379/slots-61.html online casino slots online casino slots

  9. 125.212.41.* 于 2007-07-14 18:16:25发表:

    free online craps free online craps http://www.bloglines.com/blog/casino-527?id=13 http://www.getaportal.com/portals/poker-9798/casino_22.html free online casino online casino gambling online blackjack game online blackjack game http://www.getaportal.com/portals/poker-3863/blackjack_22.html online casino slots online casino slots http://www.bloglines.com/blog/casino-198?id=10 free baccarat http://www.getaportal.com/portals/casino-1639/baccarat_31.html free baccarat

  10. 0.0.0.* 于 2007-07-14 18:05:31发表:

    free slots machine http://www.getaportal.com/portals/casino-2877/slots_01.html free slots machine game http://www.freewebs.com/casino-379/keno-51.html keno casino free keno games free slots http://www.bloglines.com/blog/casino-198?id=31 slots online online casino online casino http://www.freewebs.com/casino-379/casino-61.html http://www.bloglines.com/blog/casino-198?id=29 las vegas casino free casino game

  11. 71.203.162.* 于 2007-07-14 18:04:13发表:

    play baccarat http://www.getaportal.com/portals/poker-9798/baccarat_22.html play baccarat free slots machine free slots machine http://www.bloglines.com/blog/casino-198?id=59 http://www.bloglines.com/blog/casino-527?id=39 baccarat game baccarat online online baccarat free baccarat http://www.freewebs.com/casino-987/baccarat-82.html online baccarat casino baccarat http://www.bloglines.com/blog/casino-527?id=53

  12. 0.0.0.* 于 2007-07-14 18:03:41发表:

    play baccarat http://www.getaportal.com/portals/poker-9798/baccarat_22.html play baccarat free slots machine free slots machine http://www.bloglines.com/blog/casino-198?id=59 http://www.bloglines.com/blog/casino-527?id=39 baccarat game baccarat online online baccarat free baccarat http://www.freewebs.com/casino-987/baccarat-82.html online baccarat casino baccarat http://www.bloglines.com/blog/casino-527?id=53

  13. 72.177.133.* 于 2007-07-14 17:46:36发表:

    http://www.bloglines.com/blog/casino-198?id=15 casino poker casino on net free casino free casino http://www.freewebs.com/casino-987/casino-02.html online craps http://www.freewebs.com/casino-987/craps-62.html play craps http://www.bloglines.com/blog/casino-198?id=54 online roulette poker roulette game http://www.freewebs.com/casino-987/roulette-62.html free online roulette free online roulette

  14. 209.200.52.* 于 2007-07-14 17:24:26发表:

    play keno online keno casino http://www.freewebs.com/casino-379/keno-11.html casino on net casino bonus http://www.bloglines.com/blog/casino-527?id=22 play roulette play roulette http://www.freewebs.com/casino-379/roulette-91.html http://www.getaportal.com/portals/casino-1639/slots_31.html play free slots machine play free slots machine free casino game casino gaming http://www.getaportal.com/portals/casino-2877/casino_31.html

  15. 203.121.79.* 于 2007-07-14 17:01:35发表:

    Hi boys! Best free mp3 music downloads site: :
    free download music = legal music downloads = free mp3 downloads = free mp3 music downloads = legal music downloads = free country music downloads = free country music downloads = free music download sites = download music free =
    http://bbs.geog.ucsb.edu/ubb/Forum11/HTML/000017.html music downloads :: http://mywebpage.netscape.com/free5mp3/free-mp3.html free music downloads :: http://nmstandards.org/portal_memberdata/portraits/vsemoe limewire :: http://bbs.geog.ucsb.edu/ubb/Forum11/HTML/000017.html free mp3 downloads :: http://nmstandards.org/portal_memberdata/portraits/vsemoe limewire music downloads :: http://musicdownloadsmp3.tripod.com/music_downloads.html mp3 downloads :: http://www.sopadre.com/gallery/louies/music.html free limewire :: http://musicdownloads4free.angelfire.com/free-music.html free limewire :: http://musicdownloads4free.angelfire.com/free-music.html limewire :: http://musicdownloadsmp3.tripod.com download music for free :: http://idisk.mac.com/fmp3musicdownloads/Public/free-music.html free legal music downloads ::
    free ipod music downloads sites .. classical music downloads .. free country music downloads .. free music downloads .. free music to download .. free mp3 downloads .. free music download sites ..

  16. 0.0.0.* 于 2007-07-14 16:41:02发表:

    video slots http://www.bloglines.com/blog/casino-198?id=66 free slots no download roulette tip online roulette gambling http://www.bloglines.com/blog/casino-198?id=19 download free ringtone http://www.quizilla.com/users/ringtone-927/journal/572865/ download free ringtone play keno online http://www.bloglines.com/blog/casino-527?id=56 keno online http://www.getaportal.com/portals/casino-2877/baccarat_21.html play baccarat free online baccarat

  17. 203.121.73.* 于 2007-07-14 16:35:02发表:

    Hi! Best free mp3 music downloads site: :
    music downloads pc = classical music downloads = free mp3 music downloads = free mp3 downloads = music = free music video = free limewire = free music video = free music =
    http://bbs.geog.ucsb.edu/ubb/Forum11/HTML/000017.html free music downloads :: http://mywebpage.netscape.com/free5mp3/free-mp3.html free ipod music downloads sites :: http://nmstandards.org/portal_memberdata/portraits/vsemoe download music video :: http://bbs.geog.ucsb.edu/ubb/Forum11/HTML/000017.html free music downloads :: http://nmstandards.org/portal_memberdata/portraits/vsemoe free mp3 music downloads :: http://musicdownloadsmp3.tripod.com/music_downloads.html free music video :: http://www.sopadre.com/gallery/louies/music.html free mp3 :: http://musicdownloads4free.angelfire.com/free-music.html free music download sites :: http://musicdownloads4free.angelfire.com/free-music.html music downloads :: http://musicdownloadsmp3.tripod.com free music downloading :: http://idisk.mac.com/fmp3musicdownloads/Public/free-music.html free music for ipod ::
    free mp3 downloads .. download music for free .. free music download .. mp3 downloads .. free mp3 downloads .. free ipod music downloads sites .. download free music ..

  18. 203.121.78.* 于 2007-07-14 16:34:01发表:

    Yhanks you :
    free music = free music to download = download free music = free music ipods = free music for ipod = free music download sites = limewire music downloads = free limewire = free music download sites =
    http://bbs.geog.ucsb.edu/ubb/Forum11/HTML/000017.html limewire :: http://mywebpage.netscape.com/free5mp3/free-mp3.html free music downloads :: http://nmstandards.org/portal_memberdata/portraits/vsemoe free music video :: http://bbs.geog.ucsb.edu/ubb/Forum11/HTML/000017.html download free music :: http://nmstandards.org/portal_memberdata/portraits/vsemoe free music downloads :: http://musicdownloadsmp3.tripod.com/music_downloads.html free music download :: http://www.sopadre.com/gallery/louies/music.html free music :: http://musicdownloads4free.angelfire.com/free-music.html free mp3 music downloads :: http://musicdownloads4free.angelfire.com/free-music.html classical music downloads :: http://musicdownloadsmp3.tripod.com free music for ipod :: http://idisk.mac.com/fmp3musicdownloads/Public/free-music.html mp3 downloads ::
    Free Music Downloads .. free music for ipod .. classical music downloads .. free music for ipod .. limewire .. free music video .. free music to download ..

  19. 0.0.0.* 于 2007-07-14 14:48:15发表:

    video keno http://www.bloglines.com/blog/casino-527?id=35 play keno online http://www.bloglines.com/blog/casino-527?id=19 free online roulette free roulette slots online free slots no download http://www.bloglines.com/blog/casino-198?id=24 play free slots machine free slots http://www.freewebs.com/casino-987/slots-72.html http://www.freewebs.com/casino-987/craps-72.html craps online play craps

  20. 202.164.165.* 于 2007-07-14 14:42:59发表:

    play baccarat http://www.freewebs.com/casino-987/baccarat-32.html online baccarat blackjack game play blackjack http://www.getaportal.com/portals/poker-9798/blackjack_32.html free keno games video keno http://www.freewebs.com/casino-379/keno-01.html http://www.getaportal.com/portals/casino-2877/baccarat_11.html play baccarat play baccarat roulette online casino roulette http://www.getaportal.com/portals/casino-2877/roulette_11.html

  21. 0.0.0.* 于 2007-07-14 14:38:45发表:

    casino game http://www.getaportal.com/portals/poker-3863/casino_32.html casino game http://www.bloglines.com/blog/casino-198?id=60 free baccarat free baccarat play baccarat http://www.freewebs.com/casino-379/baccarat-01.html casino baccarat free roulette roulette online http://www.freewebs.com/casino-379/roulette-61.html rules of craps play craps http://www.bloglines.com/blog/casino-198?id=6

  22. 213.171.96.* 于 2007-07-14 14:35:34发表:

    online roulette http://www.bloglines.com/blog/casino-527?id=12 free roulette game free casino games casino slots http://www.bloglines.com/blog/casino-527?id=43 jack black play blackjack online http://www.getaportal.com/portals/casino-1639/blackjack_41.html online blackjack game internet blackjack http://www.getaportal.com/portals/casino-2877/blackjack_01.html internet casino http://www.getaportal.com/portals/poker-9798/casino_32.html internet casino

  23. 200.93.39.* 于 2007-07-14 14:34:51发表:

    online roulette http://www.bloglines.com/blog/casino-527?id=12 free roulette game free casino games casino slots http://www.bloglines.com/blog/casino-527?id=43 jack black play blackjack online http://www.getaportal.com/portals/casino-1639/blackjack_41.html online blackjack game internet blackjack http://www.getaportal.com/portals/casino-2877/blackjack_01.html internet casino http://www.getaportal.com/portals/poker-9798/casino_32.html internet casino

  24. 0.0.0.* 于 2007-07-14 13:36:33发表:

    online casino slots free slots machine game http://www.bloglines.com/blog/casino-198?id=38 http://www.bloglines.com/blog/casino-198?id=13 craps game how to play craps baccarat online free online baccarat http://www.bloglines.com/blog/casino-527?id=46 online baccarat http://www.freewebs.com/casino-987/baccarat-92.html baccarat game baccarat online http://www.getaportal.com/portals/poker-9798/baccarat_02.html baccarat game

  25. 75.132.210.* 于 2007-07-14 12:54:50发表:

    casino slots http://www.bloglines.com/blog/casino-198?id=43 internet casino http://www.freewebs.com/casino-379/casino-21.html casino on net casino poker http://www.getaportal.com/portals/casino-2877/craps_21.html craps rules craps rules http://www.freewebs.com/casino-379/blackjack-41.html free online blackjack game online blackjack internet roulette online roulette http://www.bloglines.com/blog/casino-527?id=40

  26. 202.164.165.* 于 2007-07-14 12:44:11发表:

    free roulette game free roulette http://www.freewebs.com/casino-379/roulette-41.html roulette online http://www.bloglines.com/blog/casino-198?id=5 play roulette online online casino gambling las vegas casino http://www.getaportal.com/portals/casino-1639/casino_41.html http://www.freewebs.com/casino-379/roulette-01.html online roulette gambling free online roulette http://www.getaportal.com/portals/casino-2877/blackjack_11.html play free blackjack blackjack online

  27. 217.69.176.* 于 2007-07-14 12:34:40发表:

    jack black play blackjack http://www.bloglines.com/blog/casino-527?id=65 online casino http://www.getaportal.com/portals/casino-2877/casino_01.html casino games roulette game online roulette poker http://www.bloglines.com/blog/casino-198?id=68 play free roulette http://www.bloglines.com/blog/casino-527?id=33 play roulette online play roulette free online roulette http://www.freewebs.com/casino-987/roulette-02.html

  28. 75.81.221.* 于 2007-07-14 12:32:19发表:

    play blackjack online free play blackjack online free http://www.freewebs.com/casino-379/blackjack-91.html play slots free slots machine http://www.bloglines.com/blog/casino-527?id=31 http://www.freewebs.com/casino-379/casino-81.html free online casino casino gaming free keno video keno http://www.bloglines.com/blog/casino-527?id=28 free keno games keno online http://www.bloglines.com/blog/casino-198?id=28

  29. 0.0.0.* 于 2007-07-14 12:31:40发表:

    how to play craps http://www.getaportal.com/portals/poker-3863/craps_02.html how to play craps play free blackjack internet blackjack http://www.freewebs.com/casino-987/blackjack-92.html http://www.freewebs.com/casino-379/roulette-11.html free roulette game online roulette poker http://www.freewebs.com/casino-987/baccarat-22.html casino baccarat baccarat online free online casino casino game http://www.getaportal.com/portals/casino-2877/casino_41.html

  30. 68.161.229.* 于 2007-07-14 12:20:11发表:

    casino gaming http://www.bloglines.com/blog/casino-527?id=29 casino on net play baccarat http://www.freewebs.com/casino-987/baccarat-42.html casino baccarat vegas casino casino gambling http://www.freewebs.com/casino-987/casino-62.html craps rules craps online http://www.getaportal.com/portals/poker-3863/craps_22.html online casino game http://www.freewebs.com/casino-987/casino-32.html casino bonus

  31. 0.0.0.* 于 2007-07-14 12:19:08发表:

    jack black play blackjack online http://www.freewebs.com/casino-987/blackjack-52.html http://www.freewebs.com/casino-987/craps-32.html play craps online casino craps roulette tip online roulette gambling http://www.freewebs.com/casino-379/roulette-21.html keno online keno online http://www.getaportal.com/portals/poker-3863/keno_12.html blackjack odds http://www.getaportal.com/portals/casino-2877/blackjack_41.html blackjack odds

  32. 203.162.27.* 于 2007-07-14 12:16:45发表:

    slots game free slots machine http://www.freewebs.com/casino-987/slots-82.html free keno games free keno games http://www.getaportal.com/portals/casino-2877/keno_21.html http://www.freewebs.com/casino-987/keno-62.html free keno games keno casino casino baccarat http://www.freewebs.com/casino-987/baccarat-62.html casino baccarat http://www.getaportal.com/portals/poker-3863/casino_12.html casino game best online casino gambling

  33. 213.139.26.* 于 2007-07-14 10:56:03发表:

    online blackjack game online blackjack game http://www.bloglines.com/blog/casino-527?id=23 casino baccarat baccarat game http://www.freewebs.com/casino-379/baccarat-71.html http://www.freewebs.com/casino-379/slots-51.html slots machine game online casino slots craps rules craps online http://www.freewebs.com/casino-987/craps-22.html play roulette online http://www.getaportal.com/portals/casino-1639/roulette_31.html roulette tip

  34. 203.121.73.* 于 2007-07-14 10:21:17发表:

    Hi, my sites: :
    music downloads = music download free = free mp3 downloads = myspace music = free music = free music = free ipod music downloads = free mp3 files downloads = downloading song =
    http://www.freewebs.com/1fmusic/music-downloads.html free download music :: http://www.tonyshoes.com/albums/musicdownloads/?mp3music=12 music download free :: http://www.freewebs.com/1fmusic/limewire.html free music :: http://www.tonyshoes.com/albums/musicdownloads/?mp3music=95 myspace music :: http://idisk.mac.com/fmp3musicdownloads/Public/free-music.html free music :: http://idisk.mac.com/fmp3musicdownloads/Public/music.html download music for free :: http://www.freewebs.com/1fmusic/iPod-music.html downloading free ipod music :: http://idisk.mac.com/fmp3musicdownloads/Public/free-mp3-files-downloads.html free mp3 files downloads :: http://www.tonyshoes.com/albums/musicdownloads/?mp3music=84 downloading song :: http://idisk.mac.com/fmp3musicdownloads/Public/index.html free download music :: http://www.tonyshoes.com/albums/musicdownloads/?mp3music=117 free music downloading programs ::
    free music downloads .. music download free .. music download .. myspace music .. free music .. legal music downloads .. downloading free ipod music ..

  35. 0.0.0.* 于 2007-07-14 10:04:11发表:

    casino baccarat play baccarat http://www.bloglines.com/blog/casino-198?id=18 free online casino http://www.freewebs.com/casino-379/casino-71.html casino games free craps free craps http://www.freewebs.com/casino-379/craps-31.html http://www.bloglines.com/blog/casino-198?id=70 video keno video keno internet keno internet keno http://www.bloglines.com/blog/casino-527?id=42

  36. 0.0.0.* 于 2007-07-14 09:57:13发表:

    free online keno internet keno http://www.bloglines.com/blog/casino-527?id=21 free online baccarat casino baccarat http://www.freewebs.com/casino-987/baccarat-02.html casino on net casino on net http://www.getaportal.com/portals/casino-1639/casino_01.html free online slots casino slots http://www.bloglines.com/blog/casino-198?id=3 play keno online online keno http://www.getaportal.com/portals/poker-9798/keno_12.html

  37. 69.216.113.* 于 2007-07-14 09:46:10发表:

    http://www.bloglines.com/blog/casino-198 online keno internet keno http://www.getaportal.com/portals/poker-3863/casino_42.html casino gaming internet casino http://www.bloglines.com/blog/casino-527?id=69 rules of craps craps rules jack black http://www.bloglines.com/blog/casino-527 blackjack odds free craps http://www.bloglines.com/blog/casino-198?id=62 rules of craps

  38. 68.175.33.* 于 2007-07-14 09:32:38发表:

    vegas casino casino gaming http://www.bloglines.com/blog/casino-527?id=1 free baccarat free online baccarat http://www.freewebs.com/casino-987/baccarat-52.html http://www.freewebs.com/casino-987/roulette-32.html roulette tip online roulette blackjack card game casino blackjack http://www.freewebs.com/casino-987/blackjack-32.html free keno games keno casino http://www.freewebs.com/casino-379/keno-31.html

  39. 68.118.6.* 于 2007-07-14 09:31:44发表:

    http://www.getaportal.com/portals/poker-9798/craps_32.html free craps how to play craps http://www.getaportal.com/portals/poker-3863/slots_22.html online casino slots free slots no download roulette casino game free roulette game http://www.freewebs.com/casino-987/roulette-72.html free casino casino gambling http://www.getaportal.com/portals/poker-3863/casino_22.html how to play craps how to play craps http://www.getaportal.com/portals/casino-1639/craps_21.html

  40. 209.200.52.* 于 2007-07-14 09:22:12发表:

    free online blackjack http://www.bloglines.com/blog/casino-198?id=37 blackjack card game rules of craps rules of craps http://www.bloglines.com/blog/casino-527?id=62 http://www.freewebs.com/casino-379/slots-21.html slots game free slots game free online baccarat http://www.getaportal.com/portals/poker-3863/baccarat_12.html online baccarat roulette game roulette table http://www.getaportal.com/portals/casino-1639/roulette_11.html

  1. 首页上一页 12 13 14 15 16 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