Reversing the single-way linked list以下是在Java中实现单向链表反转的两种常见方法:
**一、迭代法**
1. **思路**
- 需要三个指针,分别表示当前节点(`cur`)、当前节点的前驱节点(`pre`)和当前节点的后继节点(`next`)。
- 初始时,`pre`为`null`,`cur`指向链表的头节点。
- 在遍历链表的过程中,先保存`cur`的后继节点到`next`,然后将`cur`的`next`指针指向`pre`,接着更新`pre`为`cur`,`cur`为`next`,直到`cur`为`null`,此时`pre`就是反转后的链表头节点。
2. **示例代码**
```java
class Node {
public int value;
public Node next;
public Node(int i) {
value = i;
next = null;
}
// 向链表中添加新节点
public void add(Node head, Node add) {
if (head == null) {
return;
}
while (head.next!= null) {
head = head.next;
}
head.next = add;
}
// 由头节点出发顺序遍历整个链表
public static void print(Node head) {
if (head == null) {
System.out.println("链表为空");
}
while (head!= null) {
System.out.print((head.value + " => "));
head = head.next;
}
}
// 反转链表(迭代的方式顺序逐步处理)
public static Node reverse(Node head) {
if (head == null || head.next == null) {
return head;
}
Node cur = head;
Node pre = null;
Node next = null;
while (cur!= null) {
next = cur.next;
cur.next = pre;
pre = cur;
cur = next;
}
return pre;
}
}
```
**二、递归法**
1. **思路**
- 对于递归反转链表,基本思想是将链表除了头节点之外的部分先递归反转,然后将头节点连接到反转后的链表后面。
- 递归的终止条件是当链表只有一个节点或者为空时,直接返回该节点。
2. **示例代码**
```java
class Node {
public int value;
public Node next;
public Node(int i) {
value = i;
next = null;
}
// 递归方法反转链表
public Node reverseRecurrence(Node head) {
if (head.next == null) {
return head;
}
Node last = reverseRecurrence(head.next);
head.next.next = head;
head.next = null;
return last;
}
}
```
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Is there a way to display single issue comics effectively?Sure. One option is to organize them in clear plastic sleeves and then display them on a wall-mounted rack. Another way is to put them in a custom-made display case with proper lighting to enhance the viewing experience.
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2024-10-02 00:58
How to educate students from single-parent families in a scientific wayEducation was very important for students from single-parent families. The following are some scientific education methods:
1. provide emotional support: students from single-parent families may face more emotional problems such as loss, anxiety, loneliness, etc. The school should provide emotional support so that students feel that they are not alone and can share their feelings with their classmates.
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Schools should provide scientific, comprehensive, and individual education to help students from single-parent families achieve better development.
The difference between single-phase and two-way three-phase motorYou may have some misunderstandings. Usually, it's the difference between single-phase electricity and three-phase electricity. There's no concept of two-way electricity.
Single-phase electricity only had one AC power source. The voltage and current cycle were the same, and the power and power changed with time. It was composed of a live wire and a neutral wire. The voltage was 220V, suitable for small household appliances and some small electric machines. It was more used in household power supply.
Three-phase electricity had three AC power sources, and the voltage was separated by Pi. The voltage difference between two adjacent phases was 120 degrees. The wires were three-phase and four-wire, namely three live wires and one zero wire. The constant voltage was 380 V. The output was stable and the power output was large. It was widely used in industrial fields such as large-scale machine tools, electric motor, and transformer. When the three-phase motor works, the three-phase stators (each with a difference of 120 degrees) will generate a rotating magnetic field after being connected with the three-phase alternating current, and the cutting of the rotor-winding will generate an induced current. The current carrying rotor-conductor will generate electromagnetic force under the effect of the rotating magnetic field of the stators to drive the motor to rotate, and the direction of rotation of the motor is the same as the direction of the rotating magnetic field.
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No way, no way" No way, no way " originated from the streamer Shan Niruo. This meme was widely used on the Internet to express dissatisfaction or negative emotions. The sentence was simple and easy to apply, so it was widely spread and used by the public. There was a similar usage in Hong Kong movies and dramas, where the characters often teased the police. In general, the phrase " No way, no way " was a popular online phrase used to express dissatisfaction or negative emotions.
No way, no wayNo way, no way. It was an online catchphrase that came from Zhang Zihao's rap song, Reboot, on the variety show, Rap Listen to Me. This sentence was often used to express denial, and there was a bit of sarcasm in it. Specifically, this sentence could be used to respond to something unbelievable or unsatisfactory. For example, when people hear some news or opinions, they might use this sentence to express their doubts or disagreement. However, other than the meaning of this popular phrase, the given search results did not provide any more relevant information.
If there is a will, there is a way. If there is a will, there is a way.Where there's a will, there's a way
Since ancient times, people had believed in the saying," Where there is a will, there is a way." It meant that as long as one had determination and perseverance, they could overcome difficulties and achieve their goals. This point of view tells us that as long as we have a clear goal and a firm belief, we will definitely succeed.
For example, there was a young man named Li Hua. He had been interested in music since he was young, but his family was not well off and could not provide him with better music education resources. However, he did not give up on his dream. Instead, through his own hard work and practice, he finally became an excellent musician.
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The way of expression, the way of expression, the way of rhetoric, the way of writingThe way of expression refers to the language, words, symbols, techniques, etc. used to express the author's thoughts, feelings, and opinions.
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