StudentStatsArray.java

public class StudentStatsArray 
{

  private final Student[] students;

   public StudentStatsArray(Student[] students) 
   {
    this.students = students;
   }

   // Returns the average gpa of the students
   public double averageGpa() 
   {
    double total = 0;
    for (Student s: students)
    {
      total += s.getGpa();
    }
    return total / students.length; // t
   }

   // Returns the gpa range of the students
   public double getGpaRange() 
   {
    double maxGpa = students[0].getGpa(), minGpa = students[0].getGpa();
    for (Student s: students)
    {
      if (s.getGpa() > maxGpa)
      {
        maxGpa = s.getGpa(); 
      }
      else if (s.getGpa() < minGpa)
      {
        minGpa = s.getGpa();
      }
    }
    return maxGpa - minGpa;
   }

   // Returns the name of the student that has the longest length 
   public String getLongestName()
   {
    String longestName = "";
    for (Student s: students)
    {
      if (s.getName().length() > longestName.length())
        longestName = s.getName();
    }
    return longestName;
   }

   // Returns a count of the number freshman students
   public int getNumFreshman()
   {
    int numFreshman = 0;
    for (Student s: students)
    {
      if (s.getYear() == 1)
        numFreshman++;
    }
    return numFreshman;
   }

   // Returns the index of the first student with a name equal to name. 
   // Returns -1 if not found
   public int search(String name) 
   {
    for (int i = 0; i < students.length; i++)
    {
      if (students[i].getName().contains(name))
      {
        return i;
      }
    }
    return -1;
   }

   // Returns the index of the first student with a gpa greater than or equal to the gpa
   // Returns -1 if not found
   public int search(double gpa) // me when
   {
for (int i = 0; i < students.length; i++)
    {
      if (students[i].getGpa() >= gpa)
        return i;
    }
    return -1;
   }

   // Returns 1 if the students are sorted in ascending order by their gpa; -1 if they
   // are sorted in descending order; 0 otherwise.
   public int sortStatus() 
   {
    int sort = 0;
    double prevGpa = 0;
    prevGpa = students[0].getGpa();
    for (Student s: students)
    {
      if (s.getGpa() >= prevGpa)
      {
        sort = 1;
        prevGpa = s.getGpa();
      }
      else
      {
        sort = 0;
        break;
      }
      if (sort == 0)
        break;
        
    }
    if (sort == 1)
      return sort;
    prevGpa = students[0].getGpa();
    for (Student s: students)
    {
      if (s.getGpa() <= prevGpa)
      {
        sort = -1;
        prevGpa = s.getGpa();
      }
      else
      {
        sort = 0;
        break;
      }
      if (sort == 0)
        break;
    }
    return sort;
   }


   // Returns the array of students in JSON like format
    public String toString() {
        String output = "[\n";
        for (int i = 0; i < students.length; i++) {
            Student s = students[i];
            output += "{\n";
            output += "\tname: " + s.getName() + ",\n";
            output += "\tgpa: " + s.getGpa() + ",\n";
            output += "\tyear: " + s.getYear() + "\n";
            output += "},\n" + (i < students.length - 1 ? "" : "");
        }
        output += "]";
        return output;
    }
}