import javax.swing.JOptionPane;

/**
 * Shows an example of a constructor, 
 * a toString() method, and an array of objects,  
 * for a simple class
 * 
 * @author William Albritton
 */
public class SimpleClass {

/**
* The main method starts the program
*
* @param args are not used 
*/
   public static void main(String[] args) {
      // create three President objects
      President president44 = new President("Barack", "Obama", 44);
      President president43 = new President("George", "Bush", 43);
      President president42 = new President("William", "Clinton", 42);
   
      // output three President objects
      System.out.println("The three most recent presidents are:");
      System.out.println(president44.toString() + "\n" 
         + president43.toString() + "\n" 
         + president42.toString() + "\n");
         
    //create an array of three President objects
      final Integer MAX = 3;
      President array[] = new President[MAX];
    //output the array
      System.out.println("Display Presidents array[] without initializing elements:");
      System.out.println("index   object");
      for(int i=0;i<MAX;i++){
         System.out.println("  " + i + "     " + array[i]);
      }   
      System.out.println();
      
     //use the constructor to initialize the three President objects
      array[0] = new President("George", "Washington", 1);
      array[1] = new President("John", "Adams", 2);
      array[2] = new President("Thomas", "Jefferson", 3);  
     
      //use the toString() method to output the array
      System.out.println("Display Presidents array[] after initializing elements:");
      System.out.println("The three first presidents are:");
      System.out.println("index   object");
      for(int i=0;i<MAX;i++){
         System.out.println("  " + i + "     " + array[i].toString());
      }
     
   }//end of main
   
}// end of class SimpleClass


/**
 * Stores the first, middle, and last names for a president. 
 */
class President {
   // data fields that store each object's data
   private String first; 
   private String last;
   private Integer number;

   /**
    * Stores the first name, last name and order in office of a USA President
    * NOTE: This is a Constructor, which is Used To Create EAch Object & Initialize DAta Fields.
    * 
    * @param firstName is the President's first name
    * @param lastName is the President's last name
    * @param orderInOffice is the President's order they came into office (1st, 2nd, 3rd, etc.)    
    */
   public President(String firstName, String lastName, Integer orderInOffice) {
      first = firstName;
      last = lastName;
      number = orderInOffice;
   }//end of constructor

   /**
    * Returns a String of the President's name in format: First Last was president #X 
    * NOTE: the toString() method is Used to return a String with The Data Stored In EAch Object's DAta Field.
    * 
    * @return a String of the President's name in format: First Last was president #X
    */
   public String toString() {
      String output = first + " " + last + " was president #" + number;
      return output;
   }//end of toString()
   
}//end of class President