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

public class LotteryNumbers {
    private ArrayList<Integer> numbers = new ArrayList<Integer>(); /***** DOMANDA 2 ****/

    public LotteryNumbers() {
        // Draw numbers as LotteryNumbers is created
        this.drawNumbers();                              /*****DOMANDA 1 ******/
    }


    public ArrayList<Integer> numbers() {
        return this.numbers;
    }

    public void drawNumbers() {
        // We'll format a list for the numbers

        Random random = new Random () ;
        //this.numbers = new ArrayList<Integer>();         /**** DOMANDA 2 ******/

        // Write the number drawing here using the method containsNumber()
        for (int i = 0 ; i < 7 ; i++ ) {
            int num = random.nextInt(39)+1; //int random 1-39
            if(!containsNumber(num))
            numbers.add(num) ;
            else
                i--;
        }
    }

    public boolean containsNumber(int number) {
        // Test here if the number is already in the drawn numbers
        return this.numbers.contains(number) ;
    }

    @Override
    public String toString() {

        String numbersString = "Lottery numbers:\n- ";
        for ( int num : numbers) {
            numbersString += num +" - " ;
        }
        return numbersString  ;

    }
}

//******************************* MAIN **********************************

import java.util.ArrayList;

public class Main {

    public static void main(String[] args) {
        LotteryNumbers lotteryNumbers = new LotteryNumbers();
        //ArrayList<Integer> numbers = lotteryNumbers.numbers();

        //System.out.println("Lottery numbers:");
        /*for (int number : numbers) {
            System.out.print(number + " ");
        }
        System.out.println("");*/
        System.out.println(lotteryNumbers);
    }
}