Output of the program [method overloading-iii]

Problem statement: Output of the method overloading program !

1. class MethodOverload {}
2. 
   
3. class MethodOverloadExe2 {
4. public void run(Object o) {
5. System.out.println("object");
6. }
7. public void run(String o) {
8. System.out.println("string");
9. }
10. public void run(MethodOverload o) {
11. System.out.println("user data type");
12. }
13. }
14. public class OverloadingExe2 {
15. public static void main(String[] args) {
16. MethodOverloadExe2 m = new MethodOverloadExe2();
17. m.run(null);
18. }
19. }

Output:

The method run(Object) is ambiguous for the type MethodOverloadExe2