PrimeNumbersList.java

public class PrimeNumbersList{


        public static void main(String args[]) {

                System.out.println("Starting...");
                List<Integer> list = computePrimes(20);

                for(Integer object: list) {
                        System.out.println(object);
                }

        }


        public static List<Integer> computePrimes(int max) {

                        List<Integer> list = new ArrayList<Integer>();

                        for (int i=1; i<=max; i++) {

                                //System.out.println("Checking i" +i);
                                if (isPrime(i)) {
                                        System.out.println("Value added:" + i);

                                        list.add(i);

                                }
                        }

                        return list;
        }

        public static boolean isPrime(int value) {

                int counter = 0;
                boolean returnValue = true;

                for (int i=1; i<=value; i++) {

                        if (value % i ==0) {
                                counter ++;
                        }

                        if (counter>2) {
                                returnValue = false;
                                break;
                        }

                }
                return returnValue;

        }

}