HW

Group

package com.g;

import java.util.List;
import java.io.Serializable;
import java.util.Arrays;
import java.util.Iterator;
import java.util.LinkedList;

import Exception.MyDelException;
import Exception.MyException;
import Exception.MyserchExeption;

public class Group implements Serializable {

	List<Student> studentCollection = new LinkedList<>();
	int maxSizeGroup = 10;

	public Group() {
		super();
		// TODO Auto-generated constructor stub
	}

	public Group(List students) {
		super();
		this.studentCollection = students;
	}

	public List getStudents() {
		return studentCollection;
	}

	public void setStudents(List students) {
		this.studentCollection = students;
	}

	public void addStudent(Student student) throws MyException {
		if (student == null) {
			throw new MyException();
		}
		if (studentCollection.size() >= maxSizeGroup) {
			throw new MyException();
		}
		studentCollection.add(student);
	}

	public void delStudent(int dellIndex) throws MyDelException {
		if (dellIndex > studentCollection.size()) {
			throw new MyDelException("Вы пытаетесь удалить студента которого нет в группе ");
		}
		if (studentCollection.get(dellIndex) != null) {
			Student st = studentCollection.get(dellIndex);
			studentCollection.remove(dellIndex);
			System.out.println("Student " + st.getName() + " Удален");
		}
	}

	public Student serch(String name) throws MyserchExeption {
		for (Student studen : studentCollection) {
			if (studen.getName().equals(name)) {
				return studen;
			}
		}
		for (Student studen : studentCollection) {
			if (!studen.getName().equals(name)) {
				throw new MyserchExeption();
			}
		}
		return null;
	}

	public void sort() {
		studentCollection.sort(new StudentComparator());
	}

	@Override
	public String toString() {
		sort();
		StringBuilder sb = new StringBuilder();
		for (Student student : studentCollection) {
			if (student != null) {
				sb.append(student);
				sb.append(System.lineSeparator());
			}
		}
		return sb.toString();
	}
}

Human

package com.g;

import java.io.Serializable;

public class Human implements Serializable{

	private String name;
	private String surname;
	private int age;
	public Human(String name, String surname, int age) {
		super();
		this.name = name;
		this.surname = surname;
		this.age = age;
	}
	public Human() {
		super();
		// TODO Auto-generated constructor stub
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getSurname() {
		return surname;
	}
	public void setSurname(String surname) {
		this.surname = surname;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	
	public void getInfo() {
		System.out.println("Human [name=" + name + ", surname=" + surname + ", age=" + age + "]"); 
	}
}

Main

package com.g;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;

import Exception.MyDelException;
import Exception.MyException;
import Exception.MyserchExeption;

public class Main {

	public static void main(String[] args) throws ClassNotFoundException, NullPointerException {

//        List<Student> studentCollection = new LinkedList<>();
//        studentCollection.add(new Student("Igor", "Brilov", 21, "NAU", "YIB", 2, 231));
//        studentCollection.add(new Student("Egor", "Vlasov", 20, "NAU", "YIB", 2, 231));
//        studentCollection.add(new Student("Georg", "Manykyan", 20, "NAU", "YIB", 2, 231));
//        studentCollection.add(new Student("Boris", "Akynin", 20, "NAU", "YIB", 2, 231));
//        studentCollection.add(new Student("Alex", "Clar", 22, "NAU", "YIB", 2, 231));
//        studentCollection.add(new Student("Lana", "DelRey", 22, "NAU", "YIB", 2, 231));
//        studentCollection.add(new Student("Lina", "Cravetc", 19, "NAU", "YIB", 2, 231));
//        studentCollection.add(new Student("Thom", "York", 20, "NAU", "YIB", 2, 231));
//        studentCollection.add(new Student("John", "Lenon", 20, "NAU", "YIB", 2, 231));
//        studentCollection.add(new Student("Pol", "Jons", 20, "NAU", "YIB", 2, 231));
//        studentCollection.add(new Student("Pol", "Jons", 20, "NAU", "YIB", 2, 231));

		Student firstStuden = new Student("Igor", "Brilov", 21, "NAU", "YIB", 2, 231);
		Student secondStuden = new Student("Egor", "Vlasov", 20, "NAU", "YIB", 2, 231);
		Student thirdStuden = new Student("Georg", "Manykyan", 20, "NAU", "YIB", 2, 231);
		Student foursStuden = new Student("Boris", "Akynin", 20, "NAU", "YIB", 2, 231);
		Student fifthStuden = new Student("Alex", "Clar", 22, "NAU", "YIB", 2, 231);
		Student sixthStuden = new Student("Lana", "DelRey", 22, "NAU", "YIB", 2, 231);
		Student seventhStuden = new Student("Lina", "Cravetc", 19, "NAU", "YIB", 2, 231);
		Student eigthStuden = new Student("Thom", "York", 20, "NAU", "YIB", 2, 231);
		Student ninthStuden = new Student("John", "Lenon", 20, "NAU", "YIB", 2, 231);
		Student tenthStuden = new Student("Pol", "Jons", 20, "NAU", "YIB", 2, 231);
		Student eleventhStuden = new Student("Pol", "Jons", 20, "NAU", "YIB", 2, 231);
		Student eleventhStudenn = new Student();

		Group firstGroup = new Group();
		try {

			firstGroup.addStudent(firstStuden);
			firstGroup.addStudent(firstStuden);
			firstGroup.addStudent(firstStuden);
			firstGroup.addStudent(firstStuden);
			firstGroup.addStudent(foursStuden);
			firstGroup.addStudent(fifthStuden);
			firstGroup.addStudent(sixthStuden);
			firstGroup.addStudent(seventhStuden);
			firstGroup.addStudent(eigthStuden);
			 firstGroup.addStudent(tenthStuden);
			 firstGroup.addStudent(eleventhStudenn);
			 firstGroup.addStudent(eleventhStuden);
			 firstGroup.addStudent(eleventhStuden);
		} catch (MyException e) {
			System.out.println(e.getMessage());
		}

		try {
			firstGroup.delStudent(224);

		} catch (MyDelException e) {
			System.out.println(e.getMessage());
		}

		try {
			System.out.println("Нашли " + firstGroup.serch("Igor"));
			System.out.println("Нашли " + firstGroup.serch("yu"));
		} catch (MyserchExeption e) {
			System.out.println(e.getMessage());
		}

		try (ObjectOutputStream OOS = new ObjectOutputStream(new FileOutputStream("weri"))) {
			OOS.writeObject(firstGroup);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}

		Group f = null;
		try (ObjectInputStream OIS = new ObjectInputStream(new FileInputStream("weri"))) {
			f = (Group) OIS.readObject();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException | ClassNotFoundException e) {
			e.printStackTrace();
		}
		System.out.println(f);
	}

}

StudentComparator

package com.g;

import java.util.Comparator;

public class StudentComparator implements Comparator {

	@Override
	public int compare(Object o1, Object o2) {
		Student st1 = (Student) o1;
		Student st2 = (Student) o2;
		if (st1 == null && st2 != null) {
			return -1;
		}

		if (st1 != null && st2 == null) {
			return 1;
		}

		if (st1 == null && st2 == null) {
			return 0;
		}

		if (st1.getSurname().compareToIgnoreCase(st2.getSurname()) > 0) {
			return 1;
		}
		if (st1.getSurname().compareToIgnoreCase(st2.getSurname()) < 0) {
			return -1;
		}
		return 0;
	}
}