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67 lines
2.8 KiB
67 lines
2.8 KiB
<?php require("header.inc"); ?>
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<P><i>JODE</i> is a java package containing a decompiler and an
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optimizer for java. This package is <?php selflink("license")
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?>freely available</a> under the GNU GPL.
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<b>New:</b> The bytecode package and the core decompiler is now under
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GNU Lesser General Public License, so you can integrate it in your
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project.</p>
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<P>The decompiler reads in <tt>class</tt> files and produces something
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similar to the original <tt>java</tt> file. Of course this can't be
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perfect: There is no way to produce the comments or the names of local
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variables (except when compiled with debuging) and there are often
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more ways to write the same thing. However, <i>JODE</i> does its job quite
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well, so you should give it a try and <? selflink("applet") ?>start the
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applet</a>. Jode has support for all constructs of JDK-1.3 including
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inner and anonymous classes.</P>
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<P>The optimizer transforms <tt>class</tt> files in various ways with
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can be controlled by a script file. It supports the following
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operations:</p>
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<ul>
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<li>Renaming class, method, field and local names to shorter,
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obfuscated, or unique names or according to a given translation
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table</li>
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<li>Removing debugging information</li>
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<li>Removing dead code (classes, fields, methods) and constant
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fields</li>
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<li>Optimizing local variable allocation</li>
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</ul>
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<h2>News</h2>
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<ul>
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<li><i>JODE</i> 1.1.1 is out. With support for javac v8 (jdk 1.3). </li>
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<li>The license changed to LGPL for the bytecode interface and decompiler.</li>
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</ul>
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<h2>Known bugs of the decompiler</h2>
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<p>Some jdk1.3 synthetic access functions aren't understood. The
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produced source contains access$xxx functions, but it still compiles.</p>
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<p>There may be other bugs, that cause Exceptions or invalid code.
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If you have such a problems don't hesitate to issue a bug report.
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Please include the <code>class</code> file if possible.</p>
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<h2>Limitations</h2>
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<p>If not all dependent classes can be found, the verifier (which is
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run before decompilation starts) may exit with a type error. You
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can decompile it with <tt>--verify=off</tt>, but take the warning
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serious, that types may be incorrect. There's sometimes no way to
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guess the right type, if you don't have access the full class
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hierarchie.<br>
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This is not a bug in the verifier: java will complain the same way,
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if it is run with bytecode verification turned on. And if you don't
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have the dependent classes, you can't compile the code again.</p>
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<p>There may be situations, where the code doesn't understand complex
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expressions. In this case many ugly temporary variables are used, but
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the code should still be compileable. This does especially happen
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when you compile with <tt>`-O'</tt> flag and javac has inlined some
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methods. </p>
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<?php require("footer.inc"); ?>
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