学习记录6

链表
// 定义链表节点类
class Node {
int data;
Node next;

public Node(int data) {
    this.data = data;
    this.next = null;
}

}

// 定义链表类
class LinkedList {
private Node head;

public LinkedList() {
    this.head = null;
}

// 在链表头部插入新节点
public void insertAtBeginning(int data) {
    Node newNode = new Node(data);
    newNode.next = head;
    head = newNode;
}

// 打印链表元素
public void printList() {
    Node current = head;
    while (current != null) {
        System.out.print(current.data + " ");
        current = current.next;
    }
    System.out.println();
}

}

public class LinkedListExample {
public static void main(String[] args) {
LinkedList list = new LinkedList();
list.insertAtBeginning(30);
list.insertAtBeginning(20);
list.insertAtBeginning(10);
list.printList();
}
}