From Java Byte code to Java Source Code

This article is especially for Java programmers.  I am going to give you tool which will decompile the byte code and give you source code.  Sounds good na?!  

The “Java Decompiler project” aims to develop tools in order to decompile and analyze Java 5 “byte code” and the later versions.



JD-Core is a library that reconstructs Java source code from one or more “.class” files. JD-Core may be used to recover lost source code and explore the source of Java runtime libraries. New features of Java 5, such as annotations, generics or type “enum”, are supported. JD-GUI and JD-Eclipse include JD-Core library.

JD-GUI is a standalone graphical utility that displays Java source codes of “.class” files. You can browse the reconstructed source code with the JD-GUI for instant access to methods and fields.

JD-Eclipse is a plug-in for the Eclipse platform. It allows you to display all the Java sources during your debugging process, even if you do not have them all.

JD-Core, JD-GUI and JD-Eclipse are free for non-commercial use. This means that JD-Core, JD-GUI and JD-Eclipse shall not be included or embedded into commercial software products. Nevertheless, these projects may be freely used for personal needs in a commercial or non-commercial environments.

For Downloading or want more details visit Here:

 http://java.decompiler.free.fr/

Comment here if you like the post

Read More

How to Run a Servlet

To run a servlet one should follow the steps illustrated below: 

• Download and Install the tomcat server: Install the tomcat server in a directory in which you want to install and set the classpath.for the variable JAVA_HOME in the environment variable. To get details about the installation process and setting the classpath click the link Tomcat installation.
• Set the class for the jar file: Set the classpath of the servlet-api.jar file in the variable CLASSPATH inside the environment variable by using the following steps.
  
  For Windows XP, Go to Start->Control Panel->System->Advanced->Environment Variables->New button and Set the values as
  Variable Name:  CLASSPATH 
  Variable Value:  C:\Program Files\Java\Tomcat 6.0\lib\servlet-api.jar
  
  For Windows 2000 and NT
  Go to Start->Settings->Control Panel->System->Environment Variables->New button and Set the values as
  Variable Name:  CLASSPATH
  Variable Value:  C:\Program Files\Java\Tomcat 6.0\lib\servlet-api.jar
• Create a java source file and a web.xml file in a directory structure. 
• Compile the java source file, put the compiled file (.class file) in the classes folder of your application and deploy the directory of your application in the webapps folder inside the tomcat directory.
• Start the tomcat server, open a browser window and type the URLhttp://localhost:8080/directory (folder name of your application) name/servler name and press enter.

Read More