I've added a jar in the extension folder of my JRE (lib/ext) in order to provide an extension code to my applications. Now I want to delete this jar, but I cannot. The error message says: Cannot ...
I have a Java application in a .jar-file. I can start it by typing java -jar myapp.jar and the application starts, but if I double-click on the .jar-file, nothing happens. What can be wrong? How can I ...