// This class provides a skeletal implementation of the List interface
// to minimize effort required to implement it.
public abstract class AbstractList implements IntList {
	/* Abstract classes are a good way to provide a partially implemented class.
	 * This class compiles despite not implementing all of the List interface's methods
	 * because abstract classes can't be directly instantiated and must instead be extended.
	 * A subclass of AbstractList that doesn't implement all List methods will not compile.
	 *
	 * Can't do this now that it's abstract
	 * AbstractList<String> list = new AbstractList<String>();
	 */

	// Adds the given value to the end of the list.
	public boolean add(int value) {
		return add(size(), value);
	}

	//public abstract int destroy();

	// Returns true if the value is in the list, false otherwise.
	public boolean contains(int value) {
		return indexOf(value) != -1;
	}

	// Returns true if list is empty, false otherwise.
	public final boolean isEmpty() {
		return size() == 0;
	}
}