MethodOnlyUsedFromInnerClass - Intellij Community

Reports private methods which are only called from an inner class of the class containing the method. Such methods can be safely moved into that inner class.

Example:

public class Outer {
  public static void main(String[] args) {
    new Inner().run(args[0]);
  }

  static class Inner {
    void run(String arg) {
      // Method isEmpty() is used from Inner class only
      // consider moving it to the Inner class
      if (!isEmpty(arg)) {
        System.out.println("Argument is supplied");
      }
    }
  }

  private static boolean isEmpty(String s) {
    return s != null && s.trim().isEmpty();
  }
}

Use the first checkbox below to ignore private methods which are called from an anonymous or local class.

Use the third checkbox to only report static methods.