What is JCGO?

JCGO is an Open Source software product which translatesprograms written in Java into platform-independent C code, whichcould, further, be compiled (by third-party tools) into highly-optimizednative machine code for the target platform and deployed.

JCGO is a powerful solution that enables your desktop,server-side and embedded/mobile/wireless Java applications to take fulladvantage of the underlying hardware. In addition, JCGO effectively protectsyour intellectual property by making your programs when compiled to nativecode as hard to reverse engineer as if they were written in C/C++.

TheJCGO translator uses some optimization algorithmsthat allow, together with optimizations performed by a C compiler, theresulting executable code to reach better performance if compared with thetraditional Java implementations (based on the Just-In-Time technology). Theproduced executable does not contain nor require a Java Virtual Machine toexecute, so its resource requirements are smaller than that required by atypical Java VM. This also simplifies the process of deployment anddistribution of an application. In addition, the produced native code ishighly resistant to reverse engineering and tampering.

Scope of applicability...

TheJCGO project is targeted mainly for the followinguser categories:

1. application software developers:
   • to get higher performance, smaller memory footprint and smaller start-uptime for an application,
   • to protect the code as an intellectual property,
   • to allow an application to execute on platforms without the Java VMsupport,
   • to simplify deployment, distribution and installation of an application,
   • to apply time-proven and well-known C/C++ compilation and debugging toolsto a Java application;
2. hardware device developers:
   • to migrate from C device code to Java,
   • to write new device code in Java with nearly the same performanceefficiency as in C,
   • to use Java for 8- and 16-bit CPUs with ROM-able code and small amount ofRAM,
   • to reuse existing Java code for small device programming;
3. software porters (to execute existing applications on platforms without aJava VM support);
4. software advanced users (to get higher performance for frequently usedapplications, to run an application in the 64-bit mode).

JCGO basic blocks...

JCGO consists of the following parts:

• the translator executables (one for every supported development platform);
• the JCGO-specific part of the Java runtime environment;
• the JCGO-specific part of a C runtime environment;
• the precompiled libraries part, the supplementary and JCGO-specificauxiliary tools;
• miscellaneous and sample source files, and the accompanying documentation.

For more technical information about theJCGO, pleaselook into the accompanyingmanual,FAQ.

What is Not JCGO?

JCGO is not for:

• JCGO does not produce maintainableCcode (but it produces human-readable and debuggable code), so you shouldn'ttry to use JCGO to migrate your Java project to a C/C++ one;
• JCGO does not supportJDK v1.5+language (documented in theJLS v3.0) features like Javagenerics, primitive types auto-wrapping, for-each cycles and annotations;
• JCGO is unable to tranlate Java class files as ittranlates only the Java source files;
• JCGO does not support dynamic class loading unless theclass source is added to the translation set (but the Java Proxy classes aresupported);
• JCGO does not support separate translation of Javaclasses or packages (instead, it translates the whole Java application atonce);
• JCGO does not cypher (protect) character stringscontained in the classes of your application (instead, the strings are placedin the executable file asASCII/Unicode ones and accesseddirectly by the compiled Java code without any initialization);
• JCGO is not an easy-to-use tool (at least, you shouldhave the full source code of your Java application and of the libraries ituses, you should also be familiar with the C/C++ compilation means for yourtarget platform, and be ready to debug your translated application in case,e.g., you forget to add some of your dynamic-loaded classes in the translationset).

Licensing and support policy...

JCGO is an Open Source project released under the termsof GNU Classpath license.

JCGO could be used in a commercial project. There are no runtime fees.