// Tyler Mi
// The IntList interface represents what it means to be a List
// Interfaces just contain method signatures that are required 
// out of classes that "implement" the interface

public interface IntList {      
   public void add(int value);
   
   public int size();
   
   public int get(int index) ;
   
   public int indexOf(int value);
      
   public boolean contains(int value);
   
   public void add(int index, int value);
   
   public void set(int index, int value);
   
   public void remove(int index);
   
   public void clear() ;
  
   public String toString() ;
}