Java - String cannot be converted to int [duplicate]

Answer 1

Your sc.nextLine() returns String

https://www.tutorialspoint.com/java/util/scanner_nextline.htm

Answer 2

Scanner::nextLine returns a String. In Java you can't cast a String to an int like you do implicitly.

try

temp[counter] = Integer.parseInt(sc.nextLine());

Answer 3

You need to convert sc.nextLine into int

 Scanner sc = new Scanner(new File("temperatur.txt"));

      int[] temp = new int [12];
      int counter = 0;

      while (sc.hasNextLine()) {
          String line = sc.nextLine();
          temp[counter] = Integer.ParseInt(line);
          counter++;
        }

        int sum = 0;

        for(int i = 0; i < temp.length; i++) {
          sum += temp[i];

    }

    double snitt = (sum / temp.length);

       System.out.println("The average temperature is " + snitt);
  }
}