Open Source Java Compilers

Jad Java decompiler plugin for Eclipse IDE.

z390 Portable Mainframe Assembler and Emulator

JavaGuard is a general purpose bytecode obfuscator, designed to fit effortlessly into your regular build and testing process, providing peace of mind that your valuable Java code is more secure against decompilation and other forms of reverse engineering

ULS is a class library for creating lexical analyzer from language specification file. It's provided as C/C++/C# and Java (class) libraries with a few of tools on Linux/Windows platform.

openASN.1 is an Open Source Java toolkit for the Abstract Syntax Notation One (ASN.1) which consists of a compiler and codec with a low footprint runtime library.

This sourceforge site for the project is now DEPRECATED and not updated. All current work and new releases are on github: https://github.com/OpenJML/OpenJML. The Java Modeling Language (JML) is a behavioral interface specification language that can be used to specify the behavior of Java modules (as in design by contract -- DBC). It has many tools to do assertion checking, unit testing, etc. The principal current tool of the project is OpenJML -- cf. https://www.openjml.org, with binary downloads from https://github.com/OpenJML/OpenJML/releases/latest

jdec is a Java Decompiler. It can be used to reverse the bytecodes present in a .class File to produce a Java Source File which can be nearly correct or equivalent (Due To different Interpretations) to the original java file.[With UI & command line]

Java AS400 RPG source code editor, debugger, IDE.

jRate is a real-time Java compiler and runtime system (based on GNU GCJ) with support for much of the Real-Time Specification for Java (RTSJ), including threading constructs with real-time constraints, asynchronous event handling, and memory regions.

ContractChecker is a small tool to provide support for some design by contract features to standard Java code. Internally, it is composed of an Ant task, which invokes a doclet to generate AspectJ and the AjcTask itself in order to compile it.

An architecture description language (DiaSpec) supports the description of components of a given distributed computing area. From these descriptions, DiaGen generates a dedicated programming framework to support distributed application development.

JaCIL (pronounced "jackal") is a project to create a byte-code compiler to translate .NET assemblies to Java class files.

The purpose of this project is to write a patch for Bison which adds the capability of producing Java code instead of C code. The software is based on the original Bison sources (version 1.28 of Bison). It provides a new -j option which selects Java ou

Coco/S is a compiler generator that takes plain EBNF grammar files and features a SAX style call back API. It is written in Java and produces a Java Scanner (Lexer) and Parser for the language described by the input grammar. Coco/S is a branch of the 2010/11 release of Coco/R for Java. While Coco/R takes an attributed grammar file, Coco/S has a callback API. This has the advantage of a clean separation between grammar (EBNF) and Compiler/Interpreter.

Compose* is a project that aims at enhancing the modularization capabilities of component- and object-based programming. In particular, Compose* offers aspect-oriented programming through the composition filters model.

A Controlled Language Programming (CLP) compiler, runtime engine, and development IDE for writing software in a natural (but somewhat restricted) language that clearly represents the real world concerns and maps to a 3GL (Java/Groovy) for execution.

ECL is a system-level specification language for HW/SW designs and is based on Esterel and C. The ECL compiler parses ECL, writes Esterel and C, and uses the Esterel compiler to produce an implementation. Originally developed at Cadence Berkeley Labs.

Flow4J is a java framework, that enables the user to model process flow with a gui interface. The flow may include tasks, decisions or calls to other process flows. The saved flow is in a jar file together with its bytecode.

The Generic Analyzer is a framework in Java that is designed to allow users to build, quickly and easily, compilers and interpreters without the need to implement all the complex steps of a translator.

J2c is the J2 language compiler, a superset of the Java language. The compiler can produce code for the Java and .NET platforms.

JAC (Java Asn1 Compiler) is a tool for you if you want to (1)parse your asn1 file (2)create .java classes and (3)encode/decode instances of your classes. Just forget all asn1 byte streams, and take the advantage of OOP! BER, CER and DER are all supported

A command line parser for Java programs generated from a XML file via XSLT.

JTools provides some useful tools and utilities for Java 5.0 development. Beneath some smaller utilities we have: a (Ant like) DAO framework (also including XML Repository) and a (JSP like) general purpose template generator and execution framework.

C-style, ANT/cmdline preprocessor for java, xml and other files. Designed to run smoothly with IDEs and tools - all directives occur in comments specific to the file's type, making it syntactically valid. Line numbering (debug messages!) is preserved.

Jaby=Java+Ruby Jaby is a programming language that extends Java with the syntax of do/yield in Ruby. Jaby also provide a set of library that written in Jaby.