23. Average Grades

package main;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.stream.Collectors;


public class Problem23 {
    public static void main(String[] args) {
        Scanner console = new Scanner(System.in);

        Integer count = Integer.parseInt(console.nextLine());
        List<Student> allStudents = new ArrayList<>();

        for (int i = 0; i < count; i++) {
            String[] tokens = console.nextLine().split("\\s+");
            String name = tokens[0];
            List<Double> grades = new ArrayList<>();

            for (int j = 1; j < tokens.length; j++) {
                grades.add(Double.parseDouble(tokens[j]));

            }

            allStudents.add(new Student(name, grades));

        }

        allStudents.sort((o1, o2) -> {
            if (o1.getName().compareTo(o2.getName())==0){
            return Double.compare(o2.getAverageGrade(), o1.getAverageGrade());
            }
            return o2.getName().compareTo(o1.getName());
        });

        for (Student student : allStudents.stream().filter(p->p.getAverageGrade()>=5.0).collect(Collectors.toSet())) {

            System.out.printf("%s -> %.2f\n",student.getName(),student.getAverageGrade());

        }
    }
}

class Student {
    private String name;
    private List<Double> grades;
    private double averageGrade;

    String getName() {
        return name;
    }

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

    public List<Double> getGrades() {
        return grades;
    }

    public void setGrades(List<Double> grades) {
        this.grades = grades;
    }

    double getAverageGrade() {
        if (averageGrade == 0.0) {
            setAverageGrade();
        }
        return averageGrade;
    }

    private void setAverageGrade() {
        this.averageGrade = this.grades.stream().mapToDouble(Number::doubleValue).average().getAsDouble();
    }

    Student(String name, List<Double> grades) {
        this.name = name;
        this.grades = grades;

    }
}