Good afternoon,
After using Eclipse Luna and returning to Eclipse Mars, the business simply popped up and I deleted the Eclipse files to see if it worked out and re-imported the java project.
(JFrame Access): "Error: Could not find or load main class view.Access"
All other JFrames have the same problem. Now I've created another one to test it and it runs the window or I opened the program window. Although I have not made any modifications to the JFrames source code, the problem has simply come up. I have no idea how to solve this ...