ArrayListCombiner.java

package ArrayListCombiner;

import Employee.Employee;

import java.util.ArrayList;

/**
 * Create two generic methods that take two arraylists.
 *
 * The methods should both append the second ArrayList's items, to the first.
 * Use a wildcard for one of the type arguments in each method.
 *
 * The first method should be called extendCombiner and should use ? extends E
 *
 * The second method should be called superCombiner and should use ? super E
 */
public class ArrayListCombiner {


    //public static void extendCombiner(ArrayList<E> first, ArrayList<E> second)

    // ? extends guaranteeing it's passing in correct type
    public static <E> void extendCombiner(ArrayList<E> first, ArrayList<? extends E> second) {
        first.addAll(second);
    }


    public static <E> void superCombiner(ArrayList<? super E> first, ArrayList<E> second) {
        first.addAll(second);
    }



}