import java.util.ArrayList;

public class GradeAnalyzer {
  public GradeAnalyzer() {
    
  }
  
  public int getAverage(ArrayList<Integer> grades){
    if (grades.size()<1){
      System.out.println("you can't input zero!");
      return 0;
    } else {
      int sum = 0;
      for(int i=0; i < grades.size();i++){
        sum = sum+grades.get(i);
      }
      int average = sum/grades.size();
      System.out.println("Average "+ 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);
    
  }
  
}
add grade analyzer sample code