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Java SE / Re: Java_OOP_Alexander_Online_Пн-Ср 10.00-12.00
« Последний ответ от romancter Июня 04, 2020, 09:48:04 pm »я создал новую группу, добавил в неё самые основные методы
main
main
Код: [Выделить]
package Colections.Group;
public class Main {
public static void main(String[] args) {
Group std = new Group();
std.add(new Student("Name",12,1092,'M'));
std.add(new Student("String",18,1091,'W'));
std.add(new Student("Integer",119,1094, 'M'));
std.add(new Student("Double",120,1093,'W'));
std.add(new Student("Atomic",19,1095,'M'));
std.delName("inTeger");
System.out.println(std);
std.sortAge();
System.out.println(std);
std.sortName();
System.out.println(std);
std.voenkom();
}
}
StudentКод: [Выделить]
package Colections.Group;
import java.util.Objects;
public class Student{
private String name;
private int age;
private int studBook;
private char sex;
public Student(){}
public Student(String name, int age, int studBook,char sex) {
this.name = name;
this.age = age;
this.studBook = studBook;
this.sex = sex;
}
public String getName() { return name; }
public void setName(String name) { this.name = name; }
public int getAge() { return age; }
public void setAge(int age) { this.age = age; }
public int getStudBook() { return studBook; }
public void setStudBook(int studBook) { this.studBook = studBook; }
public char getSex() { return sex; }
public void setSex(char sex) { this.sex = sex; }
@Override
public String toString() {
return name + ", " + age + ", " + studBook; }
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Student student = (Student) o;
return age == student.age &&
studBook == student.studBook &&
Objects.equals(name, student.name);
}
@Override
public int hashCode() {
return Objects.hash(name, age, studBook);
}
}
GroupКод: [Выделить]
package Colections.Group;
import java.util.*;
public class Group {
private List<Student> student = new ArrayList<>();
private int max = 10;
public void add(Student std){
if(student.size()>10)throw new NullPointerException();
student.add(std);
}
public void delName(String name){
for (int i = 0; i < student.size(); i++)
if(student.get(i).getName().toLowerCase().equals(name.toLowerCase()))student.remove(i);
}
public void sortAge(){
Collections.sort(student, new Comparator<Student>() {
@Override
public int compare(Student o1, Student o2) {
if(o1 != null && o2 == null)return 1;
if(o1 == null && o2 != null)return -1;
if(o1 == null && o2 == null)return 0;
return Integer.compare(o1.getAge(),o2.getAge());
}
});
}public void sortName(){
Collections.sort(student, new Comparator<Student>() {
@Override
public int compare(Student o1, Student o2) {
if(o1 != null && o2 == null)return 1;
if(o1 == null && o2 != null)return -1;
if(o1 == null && o2 == null)return 0;
return o1.getName().compareTo(o2.getName());
}
});
}
public void voenkom(){
List<Student> prizovniki = new ArrayList<>();
for(Student priziv:student)if(priziv.getSex() == 'M' && priziv.getAge() >= 18)prizovniki.add(priziv);
System.out.println(prizovniki);
}
@Override
public String toString() {
System.out.println("Group");
return student+"\n";
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Group group = (Group) o;
return max == group.max &&
Objects.equals(student, group.student);
}
@Override
public int hashCode() {
return Objects.hash(student, max);
}
}
