博客

实现原理：

这是第一个头结点，现在要插入一个节点，也就是让新节点指向该头结点，任何让head指向新节点，新节点变为头结点。

代码实现：

实体类：

public class entity {
    private String data;
    private entity next;

    public entity() {
    }

    public entity(entity next) {
        this.next = next;
    }

    public entity(String data, entity next) {
        this.data = data;
        this.next = next;
    }

    public String getData() {
        return data;
    }

    public void setData(String data) {
        this.data = data;
    }

    public entity getNext() {
        return next;
    }

    public void setNext(entity next) {
        this.next = next;
    }
}

头插法：

public class function {
    public static void main(String[] args) {
        entity head = new entity("1", null);
        head = add(head,"2");
        head = add(head,"3");
        show(head);
    }

    //遍历
    public static void show(entity entity) {
        System.out.println(entity.getData());
        if (entity.getNext() != null) {
            show(entity.getNext());
        } else {
            return;
        }
    }

    //头插法插入
    public static entity add(entity head,String data) {
        entity entity = new entity(data, head);
        head = entity;
        return head;
    }

}