Java接口实现：高效重写方法以处理不可变问答映射

import java.util.HashMap;
import java.util.Map;
import java.util.Set; // 可能需要引入Set
<p>public interface Chatty {</p><pre class="brush:php;toolbar:false;">// 聊天等级
int LEVEL_MIN = 1;
int LEVEL_MAX = 3;

// 问答库
Map<String, String> QA = Map.of(
        "Hello, how are you?", "I'm great, thanks.",
        "What are you?", "I am a chatbot",
        "Do you have a hobby?", "I like chatting with you.",
        "Can you tell a joke?", "You are very funny!",
        "What is the capital of UK?", "London",
        "Do you like Java?", "Yes of course.",
        "Are you a robot?", "Yes I’m a robot, but I’m a smart one!",
        "Do you get smarter?", "I hope so."
);

/**
 * 获取所有可用问题
 * @return 问题的集合
 */
Set<String> getAvailableQuestions(); // 修正方法名和返回类型以更清晰表达意图

/**
 * 回答一个给定的问题
 * @param question 接收到的问题
 * @return 对应的答案
 */
String answer(String question);

public class ChatBot implements Chatty {
<pre class="brush:php;toolbar:false;">@Override
public Set<String> getAvailableQuestions() {
    // 直接返回QA映射的所有键，这些键代表了所有可用的问题
    return Chatty.QA.keySet();
}

// ... 其他方法

public class ChatBot implements Chatty {
<pre class="brush:php;toolbar:false;">// ... getAvailableQuestions() 方法

@Override
public String answer(String question) {
    // 使用getOrDefault()方法安全地获取答案。
    // 如果问题存在，则返回对应答案；如果不存在，则返回默认的提示信息。
    return Chatty.QA.getOrDefault(question, "抱歉，我不知道如何回答这个问题。");
}

import java.util.Set;
<p>public class ChatBot implements Chatty {</p><pre class="brush:php;toolbar:false;">@Override
public Set<String> getAvailableQuestions() {
    return Chatty.QA.keySet();
}

@Override
public String answer(String question) {
    return Chatty.QA.getOrDefault(question, "抱歉，我不知道如何回答这个问题。");
}

public static void main(String[] args) {
    ChatBot myBot = new ChatBot();

    System.out.println("--- 可用问题 ---");
    for (String q : myBot.getAvailableQuestions()) {
        System.out.println("- " + q);
    }

    System.out.println("\n--- 机器人对话 ---");
    System.out.println("用户: Hello, how are you?");
    System.out.println("机器人: " + myBot.answer("Hello, how are you?"));

    System.out.println("用户: Do you like Java?");
    System.out.println("机器人: " + myBot.answer("Do you like Java?"));

    System.out.println("用户: What is your favorite color?");
    System.out.println("机器人: " + myBot.answer("What is your favorite color?"));
}