ArrayListLotto.java

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Random;

public class ArrayListLotto {

    /** Program: ArrayListLotto.java
    *   Purpose: Lotto program uses Array List
    *   Creator: Chris Clarke
    *   Created: 09.08.2012
    */

    public static void main(String[] args) {
        ArrayList<Integer> arl = new ArrayList<Integer>();
        int[] chosen = new int[SELECTIONS];

        for (int index=0; index<SIZE; index++) {
            arl.add(new Integer(index+1));
        }

        Random ran = new Random();

        for (int i=0; i<SELECTIONS; i++) {
            int selection = ran.nextInt(arl.size());
            chosen[i] = arl.get(selection);
            // remove so it can't get chosen again
            arl.remove(selection);
        }

        Arrays.sort(chosen);

        System.out.print("Here are your random lotto numbers: ");
        for (int i=0; i<SELECTIONS; i++) {
            System.out.print(chosen[i] + " ");
        }
    }

    public static final int SIZE = 49;
    public static final int SELECTIONS = 6;
}