что значит 4. В классе Solution должен быть корректно реализован метод clone.???
В 54 строчке - return user;
package com.javarush.task.task21.task2107;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Objects;
/*
Глубокое клонирование карты
*/
public class Solution implements Cloneable{
@Override
protected Object clone() throws CloneNotSupportedException {
return super.clone();
}
public static void main(String[] args) {
Solution solution = new Solution();
solution.users.put("Hubert", new User(172, "Hubert"));
solution.users.put("Zapp", new User(41, "Zapp"));
Solution clone = null;
try {
clone = solution.clone();
System.out.println(solution);
System.out.println(clone);
System.out.println(solution.users);
System.out.println(clone.users);
} catch (CloneNotSupportedException e) {
e.printStackTrace(System.err);
}
}
protected Map<String, User> users = new LinkedHashMap();
public static class User implements Cloneable{
int age;
String name;
public User(int age, String name) {
this.age = age;
this.name = name;
}
@Override
protected Object clone() throws CloneNotSupportedException {
User user = new User(this.age, this.name);
user.age = age;
user.name = name;
return super.clone();
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
User user = (User) o;
return age == user.age &&
name.equals(user.name);
}
@Override
public int hashCode() {
return Objects.hash(age, name);
}
}
}