Free java class software for linux

The Java Binary Enhancement Tool (JBET) is a general Java program analysis and manipulation tool. Existing class files can be disassembled, reassembled, or edited programmatically through the JBET API. JBET can also be used to create new Java class files from scratch. JBET uses a convenient internal representation of all the contents of Java binary (.class) files, allowing the user to edit the classes easily, in a structured manner.

JBET was developed as part of the DARPA Self-Protecting Mobile Agents project under the OASIS and Active Networks programs (contract number N66001-00-C-8602) in order to study automated software obfuscation.

The Java language was chosen for this project because of the (relative) ease of constructing binary editing tools provided by the large amount of type information present in the class files. Our two reports, the Obfuscation Techniques Evaluation Report, and the Obfuscation Report, are available from the download area. The obfuscation tool developed is not part of this release.

JBET was also used in the DARPA/AFRL Survivable Server project (contract number F30602-00-C-0183) to add additional security checks to the Java Standard Library. (The Java SecurityManager API does not support many desirable security checks, such as continued authorization of file accesses after opening.)

JBET was used to replace the native method references in the Java standard library with stubs that call a pluggable security policy. This tool, called Jpolicy, is also available for download at this website. Jpolicy is very incomplete at this time, but may be interesting to those working in Java security or changing the standard library themselves.

The internal representation of Java class files used by JBET is intented to make it easy for programmers to write Java binary code transforms. Each element of Java class files has a corresponding internal data structure: ClassInfo for entire classes, MethodInfo for methods, FieldInfo for fields, Snippit for code blocks, and Instruction for individual instructions. Snippit and Instruction understand Java opcode syntax and semantics, allowing automated creation of valid Java programs. A Java-compatible class verifier is also included.

Some code transforms are difficult to program directly by manipulating Java instructions. For those transforms, a directed acyclic graph (DAG) representation of code is available. In the DAG representation, each basic block has a corresponding DAG, with a set of input and output nodes. Edges in the graph connect "producer" nodes (such as constants, or the result of calculations) to "user" nodes (such as method calls or other calculations). Methods are divided into basic blocks and control flow is stored at the basic block level (possible because Java has only fixed jump targets)

JBET requires a Java 1.4 virtual machine to run, although it can operate on class files from earlier Java versions. The packaging and build environment supplied supports Linux and Windows with Cygwin; however, the build process is simple and could be performed manually on other platforms. Perl is required for regression testing.

Jpolicy requires a Java 1.4 virtual machine to build, either Linux or Windows NT/XP with Cygwin. gcc is required for building on Windows (supplied with Cygwin). The runtime system can be either Java 1.3 or 1.4 (with Suns JVM only), running on Linux or Windows NT/XP. Windows 9x and Windows 2000 may work as well, but have not been tested.

Installation

1. Install jdk 1.4.1.
2. Set CLASSPATH to jdk1.4.1/jre/lib/rt.jar
3. cd src; make
4. If that didnt work, examine the makefile. java or javac may not be in the path.
5. To build a jar file that can be used with "java -jar jbet.jar", run "make jar".
6. If you have perl installed, run the tests with "make test".
Optionally, run "make regen; make test".

Make a symbolic link from jbet3/bin/jbet to somewhere in your path.

Usage

JBET uses the JNI format for class names, and JNI type and method descriptors. For a summary of this syntax, use jbet help syntax. Suns JVM specification may also be helpful.

To look at a class disassembly, use jbet print. Try disassembling a class you have source for, and was built with debug info (-g): jbet -P < classpath > print < classname >. Suns JVM specification has an instruction reference.

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).

Skaringa is an API for Java and XML language binding.
It transforms Java objects into XML documents and back, and can generate XML schema definitions for a Java class.
Typical applications are data exchange, object persistence, object transformation, and driving XML based presentation layers.
Skaringa is designed for speed and simplicity, supporting a wide range of types. Skaringa works with all Plain Old Java Objects (POJOs), it is not limited to special cases, like JavaBeans.
Enhancements:
- New layout of documentation and website.
- Use SiteBuilder to generate HTML documententation.

TestGen4J automatically generates JUnit test cases from your own Java class files or source files.
Its primary focus is to exercise boundary value testing of the arguments passed to the method. It uses rules, written in a user-configurable XML file, that define boundary conditions for the data types.
The test code is separated from test data with the help of JTestCase. The test code is generated in a hierarchical manner.
Enhancements:
- This release fixes a problem in which tests are not generated for a method whose return type is an object of an inner-class of some other main class if this inner-class is private or if it not private but the main class does not have a public constructor.
- SpikeTestGen.java was changed to look for methods returning an object which are inner-classes.

FaceRSS is a simple JavaServer Faces (JSF) component that allows you to display news from specified RSS url source in one configurable tag.

So, you can place your favorite news on your website in a very simple way. FaceRSS library uses rsslib4j and therefore supports RSS version 0.9x, 1.0, and 2.0 with Syndication and Dublin Core namespaces.

Usage:

copy the facerss.jar to your WEB-INF/lib folder and add to your build path.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FaceRSS

public FaceRSS(java.lang.String url)

Method Detail

getUrl

public java.lang.String getUrl()

setUrl

public void setUrl(java.lang.String url)

getItem

public java.util.ArrayList getItem()

getMultipleItems

public java.util.ArrayList getMultipleItems(int count)

getRssName

public java.lang.String getRssName()

Scala is a modern multi-paradigm programming language designed to express common programming patterns in a concise, elegant, and type-safe way.
Scala smoothly integrates features of object-oriented and functional languages including mixins, algebraic datatypes with pattern matching, genericity, and more.
It is well integrated with Java and .NET: the Scala compiler produces standard Java class files or .NET assemblies, and Java/.NET libraries and frameworks can be used without glue code or additional declarations.
Scala is a pure object-oriented language in the sense that every value is an object. Types and behavior of objects are described by classes and traits. Class abstractions are extended by subclassing and a flexible mixin-based composition mechanism as a clean replacement for multiple inheritance.
Whats New in 2.6.0 RC1 Development Release:
- This version introduces some language changes (existential types, lazy values, structural types, etc.) and fixes many bugs.

Jakelib2 is a cross platform C++ class library with a Java-like API. An automatic garbage collector is used to take care of unused objects.

External libraries like PCRE or GTK+ are beeing integrated to provide the programmer with a homogeneous, easy to use programming environment that covers every days tasks like string handling, data storage, networking, or GUI programming.