Free java source code software for linux

Java for C++ is a tool to generate C++-wrapper-classes for existing Java-classes. This tool reads a list of Java class names and creates source code for C++-classes to wrap them.
The implementation of the wrapper classes uses JNI (Java Native Interface) to call the "real" Java classes.
The C++-API to use these wrapper classes is very close to the API of the original Java classes. So developers of C++-software can use Java-classes as if they have been implemented in C++.
Enhancements:
- A problem where null values for method arguments, method return values, or field values caused some generated code to crash was fixed.
- Updating is strongly encouraged.

The Java Brainfuck Compiler is a compiler for the uniquely powerful Brainfuck language, which produces Java bytecode that will run on any Java Virtual Machine (with no intermediate steps such as going by way of Java code).

The Java Exorcist projects aim is to create a small and easy to use tool, that can be used to extend the Java language syntactically. Why would you do that? There are basically two reasons:
First, you just might want to fix your pet-peeve in the language itself. For example, create new keywords like unless, foreach, new operators, or generate setter getters automatically for a bean property.

Secondly, you might tune the language itself for a specific project, so the project code may look more clean and thought out. For example: specific logger keyword, which automatically checks (if statement) whether the logger should be invoked or not, or even ommits the whole logging compile-time, when its disabled! Or create a method modifier transaction to enclose the whole method in a project specific transaction.

How it works on the outside

Exorcist is a compiler of extended Java code. The compiler can be used in command-line mode, or through Ant. Basically, with no extensions configured, Exorcist only compiles the standard java code. To extend the language, you can plug in classes, which extend a single interface of the exorcist framework, and implement a single (and simple) method. Thats it.

How it works inside

Exorcist works like a pre-processor. It translates the extended language into plain Java code, and then compiles it using the standard Java compiler (javac).

To analyze a language, there are two steps involved. The first is a Lexical analysis, the second is the Parsing of the lexical tokens. Lexical tokens are strings, numbers, operators, dots, semicolons, etc. These are also called terminal symbols, because they can not be analyzed further. During parsing, lexical tokens are read, and non-terminal symbols may be produced.

These include things like: expression, method body, declaration, if-statement, etc. The Exorcists tranformation engine works basically with lexical token lists. Each extension first matches itself to the start of the received token list, using terminal and non-terminal symbols freely. If the match is detected, the extension is free to modify the input token list as it pleases, and with it modify the output clean Java source code.

Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. Java checkstyle Tool automates the process of checking Java code to spare humans of this boring (but important) task. This makes it ideal for projects that want to enforce a coding standard.
Checkstyle is highly configurable and can be made to support almost any coding standard. An example configuration file is supplied supporting the Sun Code Conventions. As well, other sample configuration files are supplied for other well known conventions.
Checkstyle can check many aspects of your source code. Historically its main functionality has been to check code layout issues, but since the internal architecture was changed in version 3, more and more checks for other purposes have been added. Now Checkstyle provides checks that find class design problems, duplicate code, or bug patterns like double checked locking.
Enhancements:
- This release contains a number of enhancements and bugfixes.
- The highlights include performance improvements in the StrictDuplicateCode check and a new CrossLanguageRegexpHeader check that allows checking file headers for languages other than Java.

SourceBase is a parser library aimed at developers of free Integrated Development Environments.

It should make implementing advanced features such as intellisense code completion, call trees, symbol browsers, etc. a no-brainer. SourceBase is a tear-away development from Source Navigator.

The current aim is to support C and C++, and to provide a clean API. Future aims include addition of more languages such as Java, PHP/HTML/ASP, Perl, Python, FORTRAN and COBOL.

SourceBase uses code from Source Navigator and is licenced under GNU GPL. One of our aims is to move to a more commerce-friendly licence such as LGPL in the future. However, for that to happen, we need to move away from the source navigator codebase to fresh code. All new code contributions should be dual licenced under GPL/LGPL.

GData Java Client provides a library and source code that make it easy to access data through Google Data APIs.

The Google data APIs ("GData" for short) provide a simple standard protocol for reading and writing data on the web. GData combines common XML-based syndication formats (Atom and RSS) with a feed-publishing system based on the Atom publishing protocol, plus some extensions for handling queries.

Google also provides a set of client libraries for interacting with GData-enabled services, in a variety of programming languages. Using these libraries, you can construct GData requests, send them to a service, and receive responses.

Apache MyFaces is the first free open source Java Server Faces implementation.

What is Java Server Faces (JSF)?

Java Server Faces is a new and upcoming web application framework that accomplishes the MVC paradigm. It is comparable to the well-known Struts Framework but has features and concepts that are beyond those of Struts - especially the component orientation.

Look at Suns JSF Page to learn more about the Java Specification Request 127 and to download the specification. You can also find a useful Tutorial there!

Quickstart

Make sure to have a look at our examples - you can find a working distribution here.
Find instructions on installing them yourselves in our Getting Started section. If you cant find information you need on these pages, make sure you also go to our WIKI

Construct is a framework for command processing. It is based on a request/response cycle managed by a Controller. Construct-java has support for filters, filter chains and command chaining. The controller has two modes for request processing: synchronous and asynchronous. Validators (commons-validator) are also supported.
Main features:
- Synchronous/Asynchronous request procesing
- Command chaining (Chain of Responsability)
- Apply filters before and after request processing
- Commons-validator support
- Spring integration
Enhancements:
- Open source release to java.net.