java链表的操作:1、构建空表H,插入 {a,b,,,f} 遍历输出单链表H 输出单链表H的长度

Java中链表的操作可以通过LinkedList类实现。具体的操作如下：

1. 构建空表H

LinkedList<String> H = new LinkedList<String>();

2. 插入 {a,b,,,f}

H.add("a");
H.add("b");
H.add(null);
H.add(null);
H.add(null);
H.add("f");

注意：因为是单链表，所以需要使用add()方法进行尾部插入，而不能使用set()方法进行指定位置插入。

3. 遍历输出单链表H

for(String s : H){
    System.out.print(s + "->");
}

输出结果为：a->b->null->null->null->f->

4. 输出单链表H的长度

System.out.println("链表H的长度为：" + H.size());

输出结果为：链表H的长度为：6

相关问题

java链表构建单链表空表H，插入abcdef，遍历

以下是Java代码：

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

class LinkedList {
    Node head;
    
    public LinkedList() {
        this.head = null;
    }
    
    public void add(char data) {
        Node newNode = new Node(data);
        if (head == null) {
            head = newNode;
        } else {
            Node current = head;
            while (current.next != null) {
                current = current.next;
            }
            current.next = newNode;
        }
    }
    
    public void display() {
        Node current = head;
        while (current != null) {
            System.out.print(current.data + " ");
            current = current.next;
        }
    }
}

public class Main {
    public static void main(String[] args) {
        LinkedList list = new LinkedList();
        list.add('a');
        list.add('b');
        list.add('c');
        list.add('d');
        list.add('e');
        list.add('f');
        list.display();
    }
}

输出结果为：a b c d e f

链表的操作:1、构建空表H，插入 {"a","b",",","f"} 遍历输出单链表H 输出单链表H的长度 判断单链表H是否为空 输出单链表H的第3个元素 输出元素c的位置 在第5个位置之前插入元素e后，输出单链表 删除H的第了个元素，输出单链表H

链表的操作：

1. 构建空表H

class ListNode:
    def __init__(self, val=0, next=None):
        self.val = val
        self.next = next
        
H = ListNode()

2. 插入 {"a","b",",","f"}

H = ListNode()
curr = H
for val in ["a", "b", ",", "f"]:
    curr.next = ListNode(val)
    curr = curr.next

3. 遍历输出单链表H

curr = H.next
while curr:
    print(curr.val, end=" ")
    curr = curr.next

4. 输出单链表H的长度

curr = H.next
count = 0
while curr:
    count += 1
    curr = curr.next
print(count)

5. 判断单链表H是否为空

if H.next:
    print("H is not empty.")
else:
    print("H is empty.")

6. 输出单链表H的第3个元素

curr = H.next
for i in range(2):
    curr = curr.next
print(curr.val)

7. 输出元素c的位置

curr = H.next
pos = 0
while curr:
    pos += 1
    if curr.val == "c":
        print(f"Position of c is {pos}.")
        break
    curr = curr.next
else:
    print("c is not in the list.")

8. 在第5个位置之前插入元素e后，输出单链表

curr = H.next
pos = 0
while curr:
    pos += 1
    if pos == 4:
        new_node = ListNode("e")
        new_node.next = curr.next
        curr.next = new_node
        break
    curr = curr.next

curr = H.next
while curr:
    print(curr.val, end=" ")
    curr = curr.next

9. 删除H的第了个元素，输出单链表H

H.next = H.next.next

curr = H.next
while curr:
    print(curr.val, end=" ")
    curr = curr.next