Compare Strings in Java

Following example compares two strings by using st.compareTo (string) ,
str.compareToIgnoreCase(String) and str.compareTo(object string) of string
class and returns the ascii difference of first odd characters of compared
strings .

public class StringCompareEmp{
   public static void main(String args[]){
      String str = "Hello World";
      String anotherString = "hello world";
      Object objStr = str;

  System.out.println( str.compareTo(anotherString) );
 System.out.println( str.compareToIgnoreCase(anotherString) );   
  System.out.println( str.compareTo(objStr.toString()));
   }
}