я поменял как в примере то же самое
package com.javarush.task.task02.task0204;
/*
О семейных отношениях
*/
public class Solution {
public static void main(String[] args) {
Man man = new Man();
Woman woman = new Woman();
man.wife = woman;
woman.husband = man;
}
public static class Man {
public int age;
public int height;
public Woman husband;
}
public static class Woman {
public int age;
public int height;
public Man wife;
}
}