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Java compiler

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A Java compiler is a compiler for the programming language Java. The most common form of output from a Java compiler is Java class files containing platform-neutral Java bytecode, but there are also compilers that emit optimized native machine code for a particular hardware/operating system combination.

Most Java-to-bytecode compilers, Jikes being a well known exception, do virtually no optimization, leaving this until run time to be done by the JRE[citation needed].

The Java virtual machine (JVM) loads the class files and either interprets the bytecode or just-in-time compiles it to machine code and then possibly optimizes it using dynamic compilation.

A standard on how to interact with Java compilers programmatically was specified in JSR 199.

Major Java compilers

As of 2012, the following are major Java compilers:[citation needed]

  • The Java Programming Language Compiler (javac), included in the Java Development Kit from Oracle Corporation, open-sourced since 13 November 2006.
  • GNU Compiler for Java (GCJ), a part of the GNU Compiler Collection, which compiles C, C++, Fortran, Pascal and other programming languages besides Java. It can also generate native code using the back-end of GCC.
  • Eclipse Compiler for Java (ECJ), an open source incremental compiler used by the Eclipse project.

See also

  • Jaccelerator - a semantic compressor with Java compiler[1]

References

  1. ^ Ghosh, Subdipto (2001). Java, Jini Technologies. Proceedings of SPIE--the International Society for Optical Engineering. Vol. 4521. Society of Photo-Optical Instrumentation Engineers. p. 118. ISBN 9780819442451. Retrieved 2013-07-29. Eck et al. describe the only semantic compressor available for Java, jaccelerator. Jaccelerator, which is similar in principle to SlimBinaries.8 unites a Java compiler, which compiles the Java source code to its syntax tree, and a run-time compiler.
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