How to get java source files from jar file

• Jar : Java Archive is a group of .class files.
• We can create a jar file using following commands
• jar -cvf  example.jar test.class
• jar -cvf example.jar *.*
• To unzip from jar file we need to use following command.
• jar -xvf  instanceofjava.jar

How to get source code from jar file using java De-compilers

• We can get source code from java file by using java De-compilers.
• You can download http://techieme.in/resources-needed/ JDGUI from internet.

• Open JD-GUI and File -> open -> open target jar file.
• It will show java source code.

How to extract java files from jar in eclipse

•  We can get java source files from jar file by using eclipse also for this we need to add a plugin.
• Download jar file from http://jd.benow.ca/
• Unzip it . you will get jd.ide.eclipse.plugin_1.0.0.jar file  and add it to eclipse plugin folder.
• And restart your eclipse.
• Add target jar file to a project and now click on the file you will get source code.
• You can add target jar file using java project->java buildpath -> add external jars option

• Here i added jstl core jar to eclipse to see java source files.
• Click on the file now it will show source code 
• How to extract java files from jar