Java 通过查询输入和if语句非常方便

我对编程完全是新手，只是在玩弄我目前所知道的东西。我正在制作一种原始的“人工智能”，可以问一些简单的问题。在代码的这一部分，程序会问“你住在哪里？”和“你喜欢住在那里吗？”我试图这样做，如果用户输入的不是“否”或“是”的变体，机器人会再次问这个问题。这是我到目前为止所拥有的

        System.out.println("I have never been to " + line3 + " before. Do you like it there?");

    // Wait for user to enter a line of text
    String line4 = input.nextLine();

    if(line4.equals("Yes")){
        System.out.println("That's good! I'm glad to hear it.");
    }
        else if(line4.equals("No")){

            System.out.println("Oh no! You should move then!");

        }
        else if(line4.equals("no")){

            System.out.println("Oh no! You should move then!");

        }
        else if(line4.equals("yes")){

            System.out.println("That's good! I'm glad to hear it.");

        }

我该怎么做呢？还有，有没有更简单的方法来完成我已经在代码中编写的内容？我必须为每一个不同的是/否做出一个else-if语句，例如，我需要一个不同的else-if来表示“是”或“根本不！”等

---

非常感谢提前

一个选项，使用无限循环（和

equalsIgnoreCase

）；像

另一个选项，使用a和循环，如

Map<String, String> msgMap = new HashMap<>();
msgMap.put("yes", "That's good! I'm glad to hear it.");
msgMap.put("no", "Oh no! You should move then!");
// ...
String line4;
do {
    line4 = input.nextLine().toLowerCase();
    if (msgMap.containsKey(line4)) {
        System.out.println(msgMap.get(line4));
    }
} while (!msgMap.containsKey(line4));

那么你可以这样称呼它

if (getYesOrNo(input, "Do you like living there?")) {
    System.out.println("That's good! I'm glad to hear it.");
} else {
    System.out.println("Oh no! You should move then!");
}

---

您可以将ask函数移动到单独的方法中，并在递归中使用它（或将其与Elliott Frisch answer合并）：

因此，现在您可以这样使用它：

String prevLine = "Boston";
    String question = "I have never been to " + prevLine + " before. Do you like it there?";
    boolean answer = askUser(question);
    if (answer) {
        System.out.println("That's good! I'm glad to hear it.");
    } else {
        System.out.println("Oh no! You should move then!");
    }

---

或者再次将其包装在地图中

您的代码不完整，请输入完整的代码。。。。。您可以使用忽略大小写，而不是将

no

和

no

分开。

if (getYesOrNo(input, "Do you like living there?")) {
    System.out.println("That's good! I'm glad to hear it.");
} else {
    System.out.println("Oh no! You should move then!");
}

public static boolean askUser(String question) {
    System.out.println(question);
    String answer = input.nextLine();
    if ("yes".equalsIgnoreCase(answer)) {
        return true;
    } else if ("no".equalsIgnoreCase(answer)) {
        return false;
    } else {
        return askUser(question);
    }
}

String prevLine = "Boston";
    String question = "I have never been to " + prevLine + " before. Do you like it there?";
    boolean answer = askUser(question);
    if (answer) {
        System.out.println("That's good! I'm glad to hear it.");
    } else {
        System.out.println("Oh no! You should move then!");
    }