Ошибка: нет описания переменной women. Вроде бы все правильно...
package com.javarush.task.task02.task0213;
/*
Питомцам нужны люди
*/
public class Solution {
public static void main(String[] args) {
Cat cat = new Cat();
Dog dog = new Dog();
Fish fish = new Fish();
Woman women = new Woman();
cat.owner = woman;
dog.owner = woman;
fish.owner = woman;
}
public static class Cat {
public Woman owner;
}
public static class Dog {
public Woman owner;
}
public static class Fish {
public Woman owner;
}
public static class Woman {
}
}