i entered value in (system.in) both in vertical manner and horizontal manner and then click the run button, error and if i click without entering value, even then the same error.. 
public static void main(String[] args) throws Exception {
       int[] array = initializeArray();
       int max = max(array);
       System.out.println(max);
   }

   public static int[] initializeArray() throws IOException {
       // Create and populate the array
       BufferedReader b = new BufferedReader(InputStreamReader(System.in));

         int[] list = new int[20];

         for(int i =0; i< list.length; i++)
       {


         list[i] = Integer.parseInt(b.readLine());
       }
       return list;
   }

   public static int max(int[] array) {
       // Find the maximum
       int max = array[0];
       for (int i = 1; i < array.length; i++)
       {
            if (array[i] > max)
                 max = array[i];
       }

       return max;
   }