链表 - Java

public class Intlist {
    public int first;
    public Intlist rest;

    public static void main(String[] args) {
        Intlist L = new Intlist(); //L指向一个列表，包含first和rest
        L.first = 10;
        L.rest = null;

        L.rest = new Intlist(); //L.rest指向一个列表，包含L.rest.first和L.rest.rest
        L.rest.first = 20;
        L.rest.rest = null;

        L.rest.rest = new Intlist(); //L.rest.rest指向一个列表，包含L.rest.rest.first和L.rest.rest.rest
        L.rest.rest.first = 30;
        L.rest.rest.rest = null;
    }
}

public class Intlist {
    public int first;
    public Intlist rest;

    public Intlist(int f, Intlist r) {
        first = f;
        rest = r;
    }

    public static void main(String[] args) {
        Intlist L = new Intlist(10, null);
        L = new Intlist(20, L);
        L = new Intlist(30, L);
    }
}