Question

对于我的AP CompSci项目，我需要编写一个聊天机器人。

第一步，它需要检测某些关键字，并做出适当的回应

然而，即使statement参数不包含＆＃34; no＆＃34;，responce总会最终设置为＆＃34;为什么会这样消极？＆＃34 ;。我不知道为什么会发生这种情况，但我认为它与我使用的java contains()方法有关

我的代码列在下面

static String[] family = {"mother", "father", "brother", "sister"};
static String[] pets = {"cat", "dog", "parrot", "lizard"};

static String[] family = {"mother", "father", "brother", "sister"};
static String[] pets = {"cat", "dog", "parrot", "lizard"};

public static String getResponse(String statement) {
    String response = "Interesting. Tell me more.";

    for (int i = 0; i < family.length; i++) {
        if (statement.contains(family[i])) {
            response = "Tell me more about your family.";
        }
    }

    for (int i = 0; i < pets.length; i++) {
        if (statement.contains(pets[i])) {
            response = "Tell me more about your pets.";
        }
    }

    if (statement.contains("no")); {
        response = "Why so negative?";
    }

    return response;
}

public static void main(String[] args) {
    System.out.println(getResponse("yes"));
    //This will still act like the input is "no"
}

我为可怕的格式道歉，我对StackOverflow不太好

感谢所有帮助 - 我不知道为什么它没有输出＆＃34;有趣，告诉我更多＆＃34;喜欢它应该

谢谢！

Answer 1

你的if语句后面有一个分号：

if (statement.contains("no"));
{
    response = "Why so negative?";
}

这意味着if块的主体为空，即等效于以下代码：

if (statement.contains("no")) {
}

{
    response = "Why so negative?";
}

删除分号，它应该按预期工作。

混淆Java .contains（）方法

1 个答案: