Can I get the source code from jar file?

[www]

Hi,

I am running somebody's program. He gives me a script to run the program
and all the bunch of jar files the program needs. He didn't give me the
*.java file at all. I am wondering if I can get those *.java files from
all the *.jar files.

Thank you.

 

[swing]

Hi,

I am running somebody's program. He gives me a script to run the program
and all the bunch of jar files the program needs. He didn't give me the
*.java file at all. I am wondering if I can get those *.java files from
all the *.jar files.

Thank you.

Extract those jar files using winwar or an other program.
The owner might have included the source files.

 

[Andrew Thompson]

...I am wondering if I can get those *.java files ..

What did the author say, when you asked them?

Andrew T.

 

[scifluent]

You can use command line calls to extract the contents as well. See
the site below.

http://java.sun.com/docs/books/tutorial/deployment/jar/basicsindex.html

If the author chose to include the source files...the will be in
there...if not, you will just see class files.

 

[www]

Thank you all. I checked with:

jar tf jarfilename.jar

It is all *.class files, not *.java files. So the author didn't include
*.java files when he created these jar files.

 

[usenetuser]

Thank you all. I checked with:

jar tf jarfilename.jar

It is all *.class files, not *.java files. So the author didn't include
*.java files when he created these jar files.

You could use something like JAD (along with FrontEnd Plus) to
decompile the .class files to .java files. You won't get his
exact .java files (i.e. it won't include comments, for example) but as
near as you're going to get without the originals.... so long as he
hasn't obfuscated the original.