Arrays.java

package Pair;
import java.util.ArrayList;
import java.util.Collections;

/**
 * In here you must make firstLast, which will return a pair
 * of the first element in the array list and the last
 * element in the arraylist.
 * You must also make a min method that returns the smallest item
 * in the array list
 * A max method that returns the largest item in the arraylist
 * And a minmax method that returns a pair containing the largest
 * and smallest items from the array list
 */
public class Arrays {
    public static <E extends Comparable> Pair<E> firstLast(ArrayList<E> a) {
        return new Pair<E>(a.get(0), a.get(a.size()-1));
    }

    public static <E extends Comparable> E min(ArrayList<E> arrayList){
        Collections.sort(arrayList);
        return arrayList.get(0);
    }

    public static <E extends Comparable> E max(ArrayList<E> arrayList){
        Collections.sort(arrayList);
        return arrayList.get(arrayList.size() - 1);
    }

    public static <E extends Comparable> Pair<E> minMax (ArrayList<E> arrayList){
        Collections.sort(arrayList);
        //return new Pair<E>(arrayList.get(0), arrayList.get(arrayList.size() - 1));
        return firstLast(arrayList);
    }
}