public class Person {

    private String name;
    private Person friend;

    public Person(String name, Person friend) {
        this.name = name;
        this.friend = friend;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setFriend(Person friend) {
        this.friend = friend;
    }

    public Person getFriend() {
        return friend;
    }

}