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- клас Student:
- package students;
- public class Student {
- //полета -> характеристики (какво има студента?)
- private String name;
- private String lastName;
- private double grade;
- //конструктор
- public Student (String name, String lastName, double grade) {
- //нов обект
- //name = null
- //lastName = null
- //grade = 0.0
- this.name = name;
- this.lastName = lastName;
- this.grade = grade;
- }
- //методи -> функционалности (какво прави студента?)
- public double getGrade() {
- return this.grade;
- }
- @Override
- public String toString() {
- //"{first name} {second name}: {grade}"
- return String.format("%s %s: %.2f", this.name, this.lastName, this.grade);
- }
- }
- клас Main:
- package students;
- import java.util.ArrayList;
- import java.util.Comparator;
- import java.util.List;
- import java.util.Scanner;
- public class Main {
- public static void main(String[] args) {
- Scanner scanner = new Scanner(System.in);
- List<Student> studentList = new ArrayList<>();
- int n = Integer.parseInt(scanner.nextLine()); //брой на студентите
- for (int studentCount = 1; studentCount <= n; studentCount++) {
- String personalData = scanner.nextLine();
- //"Lakia Eason 3.90".split(" ") -> ["Lakia", "Eason", "3.90"]
- String firstName = personalData.split(" ")[0];
- String lastName = personalData.split(" ")[1];
- double grade = Double.parseDouble(personalData.split(" ")[2]);
- Student student = new Student(firstName, lastName, grade);
- studentList.add(student);
- }
- //списък с обекти от клас Student
- studentList.sort(Comparator.comparingDouble(Student :: getGrade) //ascending order по оценка
- .reversed()); //descending order по оценка
- for (Student student : studentList) {
- System.out.println(student.toString());
- }
- }
- }
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