Esempio n. 1
0
 /**
  * The main method.
  *
  * @param args the arguments
  */
 public static void main(String[] args) {
   int n;
   if (args.length != 1) {
     System.out.println("Incorrect usage.  Exiting...");
     printCorrectUsage();
     System.exit(1);
   }
   try {
     n = Integer.parseInt(args[0]);
     SieveOfEratosthenes sieve = new SieveOfEratosthenes(n);
     sieve.printPrimes();
   } catch (NumberFormatException nfe) {
     System.out.println(args[0] + " is not a number.  Exiting...");
     printCorrectUsage();
     System.exit(1);
   }
 }
Esempio n. 2
0
 public static void main(String[] args) {
   int primeList[] = SieveOfEratosthenes.findPrimes(2000000);
   long sum = 0;
   for (int i = 0; i < primeList.length; i++) sum += primeList[i];
   System.out.println(sum);
 }