数组链表模拟

Set接口实现类-HashSet

HashSet底层机制说明

HashSet底层是HashMap,HashMap底层是(数组+链表+红黑树)

@SuppressWarnings({"all"})
public class HashSetStructure {
    public static void main(String[] args) {
        //1.模拟一个HashSet的底层(HashMap的底层结构)

        //2.创建一个数组,数组类型是Node[]
        Node[] table = new Node[16];
        System.out.println("table = " + table);

        //3.创建结点
        Node john = new Node("john",null);

        table[2] = john;

        Node jack = new Node("jack",null);

        john.next = jack;//将jack结点挂载到john

        Node rose = new Node("Rose", null);

        jack.next = rose;

        Node lucy = new Node("Lucy", null);

        table[3] = lucy;//把Lucy放到table表的索引为3的位置

        System.out.println("table = " + table);


    }
}

class Node{
    //结点,存储数据,可以指向下一个结点,从而形成链表
    Object item;//存放数据
    Node next;//指向下一个结点

    public Node(Object item, Node next) {
        this.item = item;
        this.next = next;
    }
}
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