Lottery.java

package tutorialquestions.question4c70;

import java.util.Random;

public class Lottery {

 private static final int numNumbers = 7;

 private static final int lotteryMax = 49;

 private static boolean numberAlreadyChosen(int[] numbers,
 int numChosenSoFar, int candidate) {
 
 assert numChosenSoFar < numbers.length;

 for (int i = 0; i < numChosenSoFar; i++) {

 if (numbers[i] == candidate) {

 return true;

 }

 }

 return false;

 }

 /**
 * Example main method for lottery question.
 */
 public static void main(String[] args) {

 int[] numbers = new int[numNumbers];

 Random generator = new Random();

 int nextNumber = 0;

 while (nextNumber < numNumbers) {

 int candidateNumber = generator.nextInt(lotteryMax) + 1;

 if (numberAlreadyChosen(numbers, nextNumber, candidateNumber)) {
 continue;
 }

 numbers[nextNumber] = candidateNumber;
 nextNumber++;

 if (nextNumber < numNumbers) {
 System.out.print("Number " + nextNumber);
 } else {
 System.out.print("Bonus Number");
 }
 System.out.println(": " + candidateNumber);

 }

 }

}