what is wrong in the code? Error says
The server is unable to properly test your solution. Be sure you have all the classes you need. Be sure that your solution doesn't have any infinite loops.
package com.codegym.task.task20.task2013;
import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.util.List;
/*
Externalizable Person
*/
public class Solution {
public static class Person implements Externalizable {
private String firstName;
private String lastName;
private int age;
private Person mother;
private Person father;
private List<Person> children;
public Person()
{
this("Unknown", "Unknown", 0);
}
public Person(String firstName, String lastName, int age) {
this.firstName = firstName;
this.lastName = lastName;
this.age = age;
mother=null;
father=null;
children=null;
}
public void setMother(Person mother) {
this.mother = mother;
}
public void setFather(Person father) {
this.father = father;
}
public void setChildren(List<Person> children) {
this.children = children;
}
@Override
public void writeExternal(ObjectOutput out) throws IOException {
out.writeObject(mother);
out.writeObject(father);
out.writeChars(firstName);
out.writeChars(lastName);
out.writeInt(age);
out.writeObject(children);
}
@Override
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException {
mother = (Person)in.readObject();
father = (Person)in.readObject();
firstName = (String)in.readObject();
lastName = (String)in.readObject();
age = in.readInt();
children = (List)in.readObject();
}
}
public static void main(String[] args) {
}
}