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ClassroomGradeAnalyzer.java

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// a simple tool to help analyze classroom grades stored in an ArrayList

// the analyzer you build will be able to retrieve the classroom average

import java.util.ArrayList;

import java.util.Collections;

class ClassroomGradeAnalyzer{

public ClassroomGradeAnalyzer(){

}

public int getAverage(ArrayList<Integer> grades){

if(grades.size() <1){

System.out.println("The lkst is empty");

return 0;

} else {

int sum = 0;

for(Integer grade:grades){

sum+=grade;

}

int average = sum/grades.size();

System.out.println("Average is "+average);

return average;

}

public int getHighestGrade(ArrayList<Integer> grades){

ArrayList<Integer> d = grades;

Collections.sort(d); //sorts in ascending order

System.out.println("Highest Grade is "+d.get(d.size()-1));

return d.get(d.size()-1);

}

public int getLowestGrade(ArrayList<Integer> grades){

ArrayList<Integer> d = grades;

Collections.sort(d); //sorts in ascending order

System.out.println("Lowest Grade is "+d.get(0));

return d.get(0);

}

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);

ClassroomGradeAnalyzer myAnalyzer = new ClassroomGradeAnalyzer();

myAnalyzer.getAverage(myClassroom);

myAnalyzer.getHighestGrade(myClassroom);

myAnalyzer.getLowestGrade(myClassroom);

}