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I have a Desktop Application, and after manually doing anything with any of the .properties files, I have to do a Clean and Build on the project before any of the changes will show up.
What exactly do you mean by "changes to show up"? If a GUI form is opened in designer, it must be re-opened (reloaded) if you change some .properties file manually (externally), so it can read the new properties. But I don't see why clean&build should be needed here. So please describe what is your situation (steps to reproduce) specifically. Thanks
An example of the changes would be adding a key to the .properties file to be used in code not written in the gui builder. Before doing a clean and build, the result of getting the key is null. After just doing a clean and build, getting the key returns the value assigned to it in the .properties file.