public class Main {
	class myString {
		public int x() {
			return 3;
		}
	}

	// OK
	class StringSubClass1 extends myString {
		@Override
		public int x() {
			return 4;
		}
	}

	// Error: The type StringSubClass2 cannot subclass the final class String
	class StringSubClass2 // extends String
	{
	}

	public static void main(String[] args) {
	}
}