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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 output optimized native machine code for a particular hardware/operating system combination.
A standard on how to interact with Java compilers programmatically was specified in JSR 199.
Major Java compilers
As of 2019, the following are major Java compilers:
- The Java Programming Language Compiler (javac), included in the Java Development Kit from Oracle Corporation, open-sourced since 13 November 2006.
- Eclipse Compiler for Java (ECJ), an open source incremental compiler used by the Eclipse project.
- Sun's OpenJDK javac page
- JSR 199 Java Compiler API Java Specification Request for invoking the Java compiler from a Java program
- Stephan Diehl, "A Formal Introduction to the Compilation of Java", Software - Practice and Experience, Vol. 28(3), pages 297-327, March 1998.