Excelsior JET

Excelsior JET is a proprietary Java -to- native-code compiler (Ahead - of-time compiler). So it is a compiler that does not generate bytecode, as is customary for Java, but object code for a particular processor.

The compiler can generate executables for the operating systems Windows and the Linux kernel based operating systems. It can also generate dynamically loadable libraries, so DLLs for Windows and shared libraries for Linux. Excelsior JET 9.0 supports all packages of the Java SE 7 including AWT, Swing, JNI and Invocation API.

A free alternative is the GNU Compiler for Java, which can also generate native code.

AOT compiler Abstract Window Toolkit Java Native Interface
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