Java Chatbot开发：实现接口并管理不可变问答映射

import java.util.HashMap;
import java.util.Map;
import java.util.Set; // 可能需要引入Set

public interface Chatty {

    // 聊天等级
    int LEVEL_MIN = 1;
    int LEVEL_MAX = 3;

    // 问答库 (不可变)
    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."
    );

    /**
     * 获取所有可回答的问题集合
     *
     * @return 所有问题的Set
     */
    Set<String> getAvailableQuestions(); // 推荐修改为更明确的方法名和返回类型

    /**
     * 回答一个给定的问题
     *
     * @param question 用户提出的问题
     * @return 对应的答案，如果未知则返回默认回复
     */
    String answer(String question);
}

import java.util.Set; // 确保引入Set

public class ChatBot implements Chatty {

    @Override
    public Set<String> getAvailableQuestions() {
        // 通过QA.keySet()获取所有问题的集合
        return QA.keySet();
    }

    // ... 其他方法实现 ...
}

import java.util.Set;

public class ChatBot implements Chatty {

    @Override
    public Set<String> getAvailableQuestions() {
        return QA.keySet();
    }

    @Override
    public String answer(String question) {
        // 使用getOrDefault方法，如果问题不存在则返回默认回复
        return QA.getOrDefault(question, "I don't know how to answer that question.");
    }
}

import java.util.Set;
import java.util.Map; // 确保引入Map

public class ChatBot implements Chatty {

    // Chatty接口中已定义QA，无需在此重复定义

    @Override
    public Set<String> getAvailableQuestions() {
        // 返回Chatty接口中定义的QA映射的所有键
        return QA.keySet();
    }

    @Override
    public String answer(String question) {
        // 从QA映射中获取答案，如果问题不存在则返回默认回复
        return QA.getOrDefault(question, "I don't know how to answer that question.");
    }

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

        System.out.println("--- 可用问题 ---");
        myChatBot.getAvailableQuestions().forEach(System.out::println);

        System.out.println("\n--- 问答示例 ---");
        String q1 = "Hello, how are you?";
        System.out.println("问: " + q1);
        System.out.println("答: " + myChatBot.answer(q1));

        String q2 = "What are you?";
        System.out.println("问: " + q2);
        System.out.println("答: " + myChatBot.answer(q2));

        String q3 = "Do you like Java?";
        System.out.println("问: " + q3);
        System.out.println("答: " + myChatBot.answer(q3));

        String q4 = "What is your favorite color?"; // 不存在的问题
        System.out.println("问: " + q4);
        System.out.println("答: " + myChatBot.answer(q4));
    }
}