2_1 java

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Main {

   private static int inputN(){
      int n;
      boolean isCorrect;
      n = 0;

      isCorrect = false;
      Scanner sc = new Scanner(System.in);

      while(!isCorrect){
         System.out.println("Enter n - amount of days in month");
         n = sc.nextInt();
         if(n < 28 || n > 31){
            System.out.println("Incorrect input N");
         }else{
            isCorrect = true;
         }
      }
      sc.close();
      return n;
   }

   private static int[] inputFromFile(int n){
      String pathname = "";
      int counter;
      counter = 0;
      int[] days;
      days = new int[n];

      Scanner in = null;
      try {
         in = new Scanner(new File("input.txt"));
      } catch (FileNotFoundException e) {
         e.printStackTrace();
      }
      for(int i = 0; i < n; i++){
         days[i] = in.nextInt();
         if(days[i] < 0){
            counter++;
         }

      }


      for(int i = 0; i < n; i++){
         System.out.print(days[i] + ' ');
      }

      in.close();
      System.out.println("COUNTER = " + counter);
      return days;
   }

   public static void main(String[] args) throws FileNotFoundException {
      int counter, n;

      counter = 0;
      n = 0;
      int[] days;

      System.out.println("This program...");


      n = inputN();

      days = new int[n];


      days = inputFromFile(n);

      System.out.println("There are " + counter + " days with temperature < 0 degrees");
   }
}