//An interface used to compare two objects.
import java.lang.Comparable; 

/**
 * A test for the compareTo() method for several classes
 * @author William McDaniel Albritton
 */
public class TestComparable{

/**main() method: begins program
 * @param arguments is not used */
   public static void main(String[] arguments) {
    //compare two Integers
      Integer number1 = new Integer(7);
      Integer number2 = new Integer(3);
      TestComparable.output(number1, number2);
    //compare two Strings
    //note that A < Z, for alphabetical ordering
      String fruit = new String("apple");
      String animal = new String("zebra");
      TestComparable.output(fruit, animal);
    //compare two Fractions
      Fraction oneHalf = new Fraction(1, 2);
      Fraction twoFourths = new Fraction(2, 4);
      TestComparable.output(oneHalf, twoFourths); 
   //compare two Names
      Name name1 = new Name("Zeus", "Aoki");
      Name name2 = new Name("Sally", "Suzuki");
      TestComparable.output(name1, name2); 
   //compare two ThreeNames
      ThreeNames name3 = new ThreeNames("Sally", "Grace", "Suzuki");
      ThreeNames name4 = new ThreeNames("Sally", "Ann", "Suzuki");
      TestComparable.output(name3, name4);  
      try{  
      //compare a Name to a Fraction
         Fraction fiveSixths = new Fraction(5, 6);
         Name name56 = new Name("Isoroku", "Yamamoto");
         TestComparable.output(fiveSixths, name56);    	     
      }
      catch(ClassCastException exception){
         System.out.println(exception);
      }
   }
   
/**
* Outputs the toString() method and compareTo() method for two objects 
* @param object1 is the 1st object
* @param object1 is the 2nd object
*/
   public static void output(Comparable object1, Comparable object2){     
      System.out.println("object1 = " + object1); 		 
      System.out.println("object2 = " + object2);
      System.out.println("object1.compareTo(object2) = " + object1.compareTo(object2));
   }//end of method     
   
}//end of class      


/*
program output:

object1 = 7
object2 = 3
object1.compareTo(object2) = 1
object1 = apple
object2 = zebra
object1.compareTo(object2) = -25
object1 = 1 / 2
object2 = 2 / 4
object1.compareTo(object2) = 0
object1 = Aoki, Zeus
object2 = Suzuki, Sally
object1.compareTo(object2) = -18
object1 = Suzuki, Sally Grace
object2 = Suzuki, Sally Ann
object1.compareTo(object2) = 6
object1 = 5 / 6
object2 = Yamamoto, Isoroku
java.lang.ClassCastException: Name cannot be cast to Fraction

*/