Java compiler
A Java compiler is a compiler for the Java programming language.
Some Java compilers output optimized machine code for a particular hardware/operating system combination, called a domain specific computer system . An example would be the now discontinued GNU Compiler for Java.[1]
The most common form of output from a Java compiler is Java class files containing cross-platform intermediate representation (IR), called Java bytecode.[2]
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 was specified in JSR 199.[3]
It is provided by module jdk.compiler, and requires the full Java Development Kit (as opposed to just the Java Runtime Environment), and reside in the javax.tools.* namespace.[4]
Example
[edit ]packageorg.wikipedia.examples; importjava.io.IOException; importjava.io.File; importjavax.tools.JavaCompiler; importjavax.tools.ToolProvider; publicclass Example{ privatefinalStringTEST_FILE_NAME="Test.java"; publicstaticvoidmain(String[]args)throwsIOException{ FilesourceFile=newFile(TEST_FILE_NAME); if(!sourceFile.exists()){ thrownewIllegalArgumentException(String.format("File path %s does not exist!",TIME_FILE_NAME)); } JavaCompilercompiler=ToolProvider.getSystemJavaCompiler(); if(compiler==null){ thrownewRuntimeException("Compiler not available. Are you running on a JRE instead of a JDK?"); } intresult=compiler.run(null,null,null,sourceFile); System.out.printf("Compilation result: %s%n",result==0?"Success":"Failure"); } }
See also
[edit ]- List of Java Compilers
- javac, the standard Java compiler in Oracle's JDK
- Roslyn (compiler), compiler for C# also invokable programmatically
References
[edit ]- ^ "GCJ - past, present, and future". Archived from the original on 2019年08月02日. Retrieved 2021年09月24日.
- ^ "The Java Virtual Machine Specification, Java SE 8 Edition, Section 1.2". Archived from the original on 2021年09月24日. Retrieved 2021年09月24日.
- ^ "JSR 199: JavaTM Compiler API". Archived from the original on 2021年09月24日. Retrieved 2021年09月24日.
- ^ "JavaCompiler (Java SE)". docs.oracle.com. Oracle Corporation. Retrieved 21 October 2025.
External links
[edit ]- Sun's OpenJDK javac page
- Stephan Diehl, "A Formal Introduction to the Compilation of Java", Software - Practice and Experience, Vol. 28(3), pages 297-327, March 1998.
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