I have a very simple Java + Gradle project. It builds fine. It runs fine from the shell with \"gradle run\". However, if I try to run inside of IntelliJ, I get:
If none of the above method worked then try this it worked for me.
Go to File > Project Structure> Project and then in Project Compiler Output click on the three dots and provide the path of your project name(name of the file) and then click on Apply and than on Ok.
It should be like that as in the picture i an posting.