/**
 * @author CIS-121 Staff
 * @version 1.0 02/10/08
 * @param <K>
 */
public interface StackI<K>
{
	// Pops an item from the top of the stack
	// and returns it.
	public K pop();

	// Pushes an item onto the top of the stack.
	public void push(K k);

	// returns true if and only if stack is empty
	public boolean isEmpty();
}