Java create student list and sorting

Program.java

import java.util.ArrayList;
import java.util.Comparator;

public class Student {
    private String id;
    private String name;
    private double gpa;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getGPA() {
        return gpa;
    }

    public void setGPA(double gpa) {
        if (gpa >= 0 && gpa <= 4.0) {
            this.gpa = gpa;
        } else {
            this.gpa = 0;
        }
    }

    public Student(String id, String name, double gpa) {
        setId(id);
        setName(name);
        setGPA(gpa);
    }

}

public class Program {

    public static void main(String[] args) {
        int numOfStudent = 20;
        ArrayList<Student> studentList = new ArrayList<>();
        for (int i = 0; i < numOfStudent; i++) {
            studentList.add(new Student("SID" + i, "Student#" + i, i));
        }

        studentList.sort(new Comparator<Student>() {
            @Override
            public int compare(Student o1, Student o2) {
                if (o1.getGPA() == o2.getGPA()) {
                    return 0;
                }
                if (o1.getGPA() > o2.getGPA()) {
                    return -1;
                }
                return 1;

            }
        });

        String format = "%7s|%-15s|%7s";

        System.out.println(String.format(format, "SID", "Name", "GPA"));

        for (int i = 0; i < studentList.size(); i++) {
            System.out.println(String.format(format, studentList.get(i).getId(), studentList.get(i).getName(),
                    studentList.get(i).getGPA()));
        }

    }
}