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Lab4.java Normal file
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import java.util.Scanner;
import java.util.Arrays;
import java.util.Comparator;
public class Lab4 {
public static void main(String[] args) {
Students student1 = new Students("Максим", 22, "ФІОТ", 91, 8);
Students students2 = new Students("Ольга", 19, "ФЕА", 34, 4);
Students students3 = new Students("Владислав", 18, "ФММ", 55, 10);
Students students4 = new Students("Марія", 20, "ХТФ", 11, 6);
Students students5 = new Students("Петро", 23, "ФМФ", 78, 2);
Students[] students = {student1, students2, students3, students4, students5};
System.out.println("Список студентів: ");
System.out.println(String.format("%-9s | %-3s | %-9s | %-11s | %s", "Ім'я", "Вік", "Факультет", "Номер групи", "Рівень знань(від 0 до 10)"));
for (Students student : students) {
System.out.println(String.format("%-9s | %-3s | %-9s | %-11s | %s", student.getName(), student.getAge(), student.getNameOfFaculty(), student.getNumberOfGroup(), student.getLvlOfKnowledge()));
}
Scanner scan = new Scanner(System.in);
System.out.println("Введіть за чим сортувати: ");
System.out.println("1 - Зростання \n2 - Спадання:");
int incOrDec = scan.nextInt();
System.out.println("Введіть за чим хочете сортувати: ");
System.out.println("1 - Ім'я \n2 - Вік \n3 - Факультет\n4 - Група\n5 - Рівень знань: ");
int num = scan.nextInt();
if (incOrDec == 1) {
switch (num) {
case 1:
Arrays.sort(students, Comparator.comparing(Students::getName));
break;
case 2:
Arrays.sort(students, Comparator.comparingInt(Students::getAge));
break;
case 3:
Arrays.sort(students, Comparator.comparing(Students::getNameOfFaculty));
break;
case 4:
Arrays.sort(students, Comparator.comparingInt(Students::getNumberOfGroup));
break;
case 5:
Arrays.sort(students, Comparator.comparingInt(Students::getLvlOfKnowledge));
break;
}
} else {
switch (num) {
case 1:
Arrays.sort(students, Comparator.comparing(Students::getName).reversed());
break;
case 2:
Arrays.sort(students, Comparator.comparingInt(Students::getAge).reversed());
break;
case 3:
Arrays.sort(students, Comparator.comparing(Students::getNameOfFaculty).reversed());
break;
case 4:
Arrays.sort(students, Comparator.comparingInt(Students::getNumberOfGroup).reversed());
break;
case 5:
Arrays.sort(students, Comparator.comparingInt(Students::getLvlOfKnowledge).reversed());
break;
}
}
System.out.println(String.format("%-9s | %-3s | %-9s | %-11s | %s", "Ім'я", "Вік", "Факультет", "Номер групи", "Рівень знань(від 0 до 10)"));
for (Students student : students) {
System.out.println(String.format("%-9s | %-3s | %-9s | %-11s | %s", student.getName(), student.getAge(), student.getNameOfFaculty(), student.getNumberOfGroup(), student.getLvlOfKnowledge()));
}
}
}

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Students.java Normal file
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public class Students {
private String name;
private int age;
private String nameOfFaculty;
private int numberOfGroup;
private int lvlOfKnowledge;
public Students(String name, int age, String nameOfFaculty, int numberOfGroup, int lvlOfKnowledge) {
this.name = name;
this.age = age;
this.nameOfFaculty = nameOfFaculty;
this.numberOfGroup = numberOfGroup;
this.lvlOfKnowledge = lvlOfKnowledge;
}
public String getName() {
return name;
}
public int getAge() {
return age;
}
public String getNameOfFaculty() {
return nameOfFaculty;
}
public int getNumberOfGroup() {
return numberOfGroup;
}
public int getLvlOfKnowledge() {
return lvlOfKnowledge;
}
}