// Zorah Fung, CSE 143
// Demonstrates usage of the IntList interface.

public class InterfaceDemo {
   public static void main(String[] args) {
      IntList list1 = new ArrayIntList();
      addAndPrint(list1);

      IntList list2 = new LinkedIntList();
      addAndPrint(list2);
      
      // Because IntList is an interface, you can't say
      IntList list3 = new IntList();
      
      // Even though a LinkedIntList has IntQueue methods (like peek),
      // the list2 variable is of type IntList, so only IntList methods can
      // be called.
      list2.remove(); // doesn't compile
      list2.peek(); // doesn't compile
      
      IntQueue queue = new LinkedIntList();
      queue.add(72);
      queue.add(42);
      queue.remove(); // this does compile!
      queue.get(0); // this doesn't compile. get(index) is an IntList method
                    // and the IntQueue method doesn't have get(index)
   }

   // Calls several methods on an IntList
   // pre: list is not null
   public static void addAndPrint(IntList list) {
      list.add(34);
      list.add(17);
      list.add(23);
      list.add(1, 6);

      System.out.println(list);
      list.remove(0);

      for (int i = 0; i < list.size(); i++) {
         System.out.println(list.get(i));
      }
   }
   
   
}