How to edit a jar file ?

Using JDeveloper 11.1.1.0 and it will not allow me to edit a jar file.
Steps
File -> Open and select a jar file
Double Click on MANIFEST.MF
The status bar displays "Read Only" and "Windows: CR/LF Editing"
All versioning has been turned off.
How do I get out of "Read Only" mode and be able to edit anything in the file ?????
Thank you

Come on, you can't be seriously try to edit a class file in side a jar.
One of the reasons they are in a jar is that users don't fiddle around with them. If you have to manipulate the manifest you can do so in the deployment descriptor of the application in JDEV.
If you are looking for something special in the jar there are a couple of explorer plug ins which allow you to do so (at your own risk).
Timo

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