Question

我为了学习目的而伪重新实现官方Java数据结构，并且我不太清楚为什么官方LinkedList看起来像一个数组而我的那个在调试时看起来像链式节点。

它可能只是调试格式还是我完全错过了LinkList实际实现的方式？

CustomNode：

package Ch02_LinkedList;

public class CustomNode {
    private int data;

    CustomNode next = null;

    CustomNode(int data) {
        this.data = data;
    }
}

CustomLinkedList：

package Ch02_LinkedList;

import java.util.LinkedList;

/**
 * Custom implementation of a singly linked list.
 *
 * A double linked list would also contain a "prev" node.
 */
public class CustomLinkedList {
    private CustomNode head;

    public void add(int value) {
        if (this.head == null) {
            this.head = new CustomNode(value);

            return;
        }

        CustomNode current = this.head;

        while (current.next != null) {
            current = current.next;
        }

        current.next = new CustomNode(value);
    }

    public void prepend(int value) {
        CustomNode newHead = new CustomNode(value);
        newHead.next = this.head;
        this.head = newHead;
    }

    public void remove(int index) throws IllegalArgumentException {
        if (this.head == null) {
            return;
        }

        if (index == 0) {
            this.head = head.next;

            return;
        }

        CustomNode current = head;
        int currentIndex = 0;

        while (current.next != null) {
            if (index == currentIndex+1) {
                current.next = current.next.next;

                return;
            }

            current = current.next;
            currentIndex++;
        }

        throw new IllegalArgumentException("No such a index has been found.");
    }

    public static void main(String[] args) {
        CustomLinkedList myList = new CustomLinkedList();
        myList.add(10);
        myList.add(20);
        myList.add(30);
        myList.add(40);
        myList.add(50);
        myList.add(60);
        myList.remove(4);

        LinkedList<Integer> officialList = new LinkedList<>();
        officialList.add(10);
        officialList.add(20);
        officialList.add(30);
        officialList.add(40);
        officialList.add(50);
        officialList.add(60);
        officialList.remove(4);

        System.out.println("Done.");
    }
}

输出：

Answer 1

IntelliJ在Preferences对话框中有一个选项：

为集合类启用备用视图
选择此选项可以更方便的格式显示集合和地图。

＆＃34;数组＆＃34;查看LinkedList的内容更方便，您认为不是吗？

如果您不喜欢方便的格式，请将其关闭。

如果CustomLinkedList已实施Collection，您甚至可能会在调试器中获得相同的便捷格式，但这只是我的猜测，因为我不使用IntelliJ

自定义LinkedList与官方LinkedList

1 个答案: