import java.util.ArrayList;

public class GradeAnalyzer {
  public GradeAnalyzer() {

  }

  public int getAverage(ArrayList<Integer> grades) {
    if (grades.size() < 1) {
      System.out.println("Error: the ArrayList is empty!");
      return 0;
    }
    else {
      int sum = 0;

      for (int grade: grades) {
        sum += grades;

      }
      int average = sum / grades.size();

      System.out.println(average);

      return average;
    }
  }
  public static void main (String[] args) {

    ArrayList<Integer> myClassroom = new ArrayList<Integer>();
    myClassroom.add(98);
    myClassroom.add(92);
    myClassroom.add(88);
    myClassroom.add(75);
    myClassroom.add(61);
    myClassroom.add(89);
    myClassroom.add(95);

    gradeAnalyzer myAnalyzer = new gradeAnalyzer();

    myAnalyzer.getAverage(myClassroom);

  }

}