Main method of executing Java in Android project

Android executed in the project Java of the Main Method

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Today, a tool class was written in the Android project, and for a simple test of the output, the main method was added directly to the class, so the problem was:

Solution is found on the Internet, has been resolved, in this record.

Right-click the project name, bring up the Properties window, open the Run/debug Settings tab, and on the right, list all Java classes in this project that contain the main method, double-click the Java class you want to allow;

Main method of executing Java in Android project