Updating file in a jar throws ZipException

Question

I\'m trying to update a file in an existing jar (in this example antlr) using the command:

jar -uf antlrworks-1.2.3.jar org/antlr/codegen/templates/Java/Java         


        

Answer 1

If you're on OS X, try the Jar Inspector application. I used it to patch a javascript bug in wicket. You can open a jar file, and it lists all the contents. Navigate to the file you want to save (in this case, a .js file) and modify the file, then save the contents, and it takes care of modifying the .jar file for you. Not sure if this would work with .java files or not.