Why is the output of the program "String S is null"

Question

public class StaticOverLoad
     public static void get(String S)
          System.out.println("String S is null");
     public static void get(Object O)
          System.out.println("Object O is null");
     public static void main(String args[])
          StaticOverLoad.get(null);
}

Answer 1

When the compiler tries to resolve an overloaded, it tries to get the most specific match. String is a subclass of object, so it is not specific. You can the call the other method by being explicit about your argument type.
StaticOverLoad.get((Object) null);