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For this question, we will be sorting Person objects. Here is the Person class so you’ll know what you have available:

public class ...

X712: Write A Comparator 2

For this question, we will be sorting Person objects. Here is the Person class so you’ll know what you have available:

public class Person{



    private int age;
    private String name;
    private String grade;

    public Person(int a, String n, String gr) {
        age = a;
        name = n;
        grade = gr;
    }


    public int getAge() {
        return age;
    }


    public String getGrade() {
        return grade;
    }

}

In this code, the String grade will ONLY ever be “excellent”, “good”, “satisfactory”, “unsatisfactory”, or “poor”. “Excellent” is the best possible grade, “good” the second best, and so on until the worst grade, “poor”. Below is the start of a comparator to compare Person objects by grade. Your task will be to finish the comparator.

Your Answer:

Answer code

public static final String[] gradeOptions = { "excellent", "good", "satisfactory",
    "unsatisfactory", "poor" };

/**
 *
 * @param grade
 * @return returns the index of the grade parameter in the array
 *         gradeOptions
 *         or throws an IndexOutOfBoundsException if grade is not in
 *         gradeOptions
 */
public int getIndexOf(String grade) {
    for (int i = 0; i < gradeOptions.length; i++) {
        if (grade.equals(gradeOptions[i])) {
            return i;
        }
    }
    throw new IndexOutOfBoundsException();
}


/**
 * @param personLeft:
 *            One student
 * @param personRight:
 *            Another student
 * @return 1 if personLeft's grade is worse than personRight's
 *         -1 if personLeft's grade is better than personRight's
 *         0 if personLeft's grade is equal to personRight's
 */
@Override
public int compare(Person personLeft, Person personRight) {
    

}

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