【发布时间】:2021-12-31 07:29:09
【问题描述】:
我正在编写一个程序来将 String 类型的数据添加到循环双向链表中并在 java 中查看它们。 我想知道如何将字符串添加到链表以及如何获取输出。
我尝试的方式报错:“构造函数 Node() 未定义” 如何解决这个问题。
这是我试过的代码:
class Node {
int data;
Node nextNode;
Node prevNode;
}
class CircularDoublyLL {
Node head = null;
Node tail = null;
public void insertLast(String songName) {
Node newNode = new Node();
newNode.data = songName;
if (head == null) {
head = tail = newNode;
head.nextNode = head;
head.prevNode = head;
} else {
tail.nextNode = newNode;
newNode.prevNode = tail;
newNode.nextNode = head;
head.prevNode = newNode;
tail = newNode;
}
}
public void displayPlayist() {
Node currentNode = head;
if (head == null) {
System.out.println("Playlist is empty!");
} else {
int songNo = 1;
while (currentNode != tail) {
System.out.println("Song " + songNo + ": " + currentNode.data);
currentNode = currentNode.nextNode;
songNo++;
}
System.out.println("Song " + songNo + ": " + currentNode.data);
}
}
}
public class MusicPlayer {
public static void main(String[] args) {
CircularDoublyLL playlist = new CircularDoublyLL();
playlist.insertLast("Song Name 1");
playlist.insertLast("Song Name 2");
playlist.insertLast("Song Name 3");
playlist.insertLast("Song Name 4");
playlist.displayPlayist();
}
}
【问题讨论】:
-
这能回答你的问题吗? Java Error: The constructor is undefined
-
我也检查过了,但我想知道如何将字符串插入 LinkedList 并查看它们
标签: java doubly-linked-list insertion circular-list