Extract source code from jar file

Question

Is there a way to extract the source code from an executable  jar file  Java ME

User · Answer

I know it s an old question Still thought it would help someone  1  Go to your jar file s folder   2  change it s extension to  zip   3  You are good to go and can easily extract it by just double clicking it    Note  I tested this in MAC  it works  Hopefully it will work on windows too

User · Answer

You can extract a jar file with the command    jar xf filename jar   References   Oracle s JAR documentation

User · Answer

Steps to get sources of a jar file as a zip    Download JD-GUI from http   java-decompiler github io  and save it at any location on your system   Drag and drop the jar or open  jar file for which you want the sources on the JD   Java Decompiler will open with all the package structure in a tree format   Click on File menu and select save jar sources  It will save the sources as a zip with the same name as the jar    Example -  We can use Eclipse IDE for Java EE Developers as well for update extract code if require  From eclipse chose Import Jar  and then select jar which you need  Follow instruction as per image below

User · Answer

-Covert  jar file to  zip  In windows just change the extension  -Unzip the  zip folder  -You will get complete  java files

User · Answer

Above tools extract the jar  Also there are certain other tools and commands to extract the jar  But AFAIK you cant get the java code in case code has been obfuscated

User · Answer

Do the following on your linux box where java works  if u like the terminal way of doing things   cd   mkdir decompiled code  amp  amp  cd decompiled code wget https   bitbucket org mstrobel procyon downloads procyon-decompiler-0 5 36 jar java -jar procyon-decompiler-0 5 36 jar  Path to your jar -o     NOTE   as  Richard commented  this may be illegal depending on whether you own the copyright to the jar  the country you live in and your purpose for doing it

User · Answer

AndroChef Java Decompiler produces very good code that you can use directly in your projects

User · Answer

I believe this can be done very easily  You can always extract the source files  Java files  of a jar file into a zip   Steps to get sources of a jar file as a zip     Download JAD from http   techieme in resources-needed  and save it at any    location on your system  Drag and drop the jar for which you want the sources on the JAD  3  JAD UI will open with all the package structure in a tree format  Click on File menu and select save jar sources  It will save the sources as a zip with the same name as the jar    Hope this helps   The link is dead due to some reason so adding the link from where you can download the JDGUI

User · Answer

Use JD GUI  Open the application  drag and drop your JAR file into it

User · Answer

suppose your JAR file is in C  Documents and Settings mmeher Desktop jar and the JAR file name is xx jar  then write the below two commands in command prompt   1  cd C  Documents and Settings mmeher Desktop jar   2  jar xf xx jar

User · Answer

Your JAR may contain source and javadoc  in which case you can simply use jar xf my jar to extract them   Otherwise you can use a decompiler as mentioned in adarshr s answer      Use JD GUI  Open the application  drag   and drop your JAR file into it

[java] Extract source code from .jar file

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