Question

我正在为我的APCS课程写一个聊天机器人。我收到一个错误，错误：class，interface或enum expected，我发现通常在括号或括号不匹配时触发。我有轻微的阅读障碍，这使得试图找到这些地狱。如果有人会帮助我，我将非常感激。这是代码。公共课Magpie2 {

public String getGreeting();
{
    return "Hello, let's talk.";
}

/**
 * Gives a response to a user statement
 * 
 * @param statement
 *            the user statement
 * @return a response based on the rules given
 */
public String getResponse(String statement)
{
     String response = "";
if (statement.length() == 0);
{
  response = "Say something, please.";
}
    String response = "";
    if (statement.indexOf(" no ") >= 0)
    {
        response = "Why so negative?";
    }
    else if (statement.indexOf("mother") >= 0
            || statement.indexOf("father") >= 0
            || statement.indexOf("sister") >= 0 )
    {
        response = "Tell me more about your family.";
    }
    else if (statement.indexOf("brother") >= 0 )
    {
        response = "I have a brother too!";
      }
    else if (statement.indexOf("cat") >= 0
            || (statement.indexOf("rabbit") >= 0) ) 
    {
     response = "Tell me more about your pets.";
     }
     else if (statement.indexOf("dog") >= 0 )
     {
         response = "I wish I had a dog.";
        }
     else if (statement.indexOf("Mrs") >= 0
            || statement.indexOf("Ms") >= 0
            || statement.indexOf("Fisher") >= 0
            || statement.indexOf("Zaengle") >= 0 )
            {
        response = "They sound like a good teacher";
    }
    else if (statement.indexOf("Mr") >= 0 )
    {
        response = "Most of my teachers are mr's";
      }
    else
    {
        response = getRandomResponse();
    }
    return response;
}

}

private String getRandomResponse()
{
    final int NUMBER_OF_RESPONSES = 6;
    double r = Math.random();
    int whichResponse = (int)(r * NUMBER_OF_RESPONSES);
    String response = "";

    if (whichResponse == 0)
    {
        response = "Interesting, tell me more.";
    }
    else if (whichResponse == 1)
    {
        response = "Hmmm.";
    }
    else if (whichResponse == 2)
    {
        response = "Do you really think so?";
    }
    else if (whichResponse == 3)
    {
        response = "You don't say.";
    }
    else if (whichResponse == 4)
    {
        response = "Ah.";
    }
    else if (whichResponse == 5)
    {
        response = "Yeah.";
    }

    return response;
}

} }

Answer 1

你确实有一个以上的错误：

在方法;

getGreeting()

getResponse()

变量String response被声明两次！删除其中一个声明
在getResponse()方法的最后，你确实有一个大括号！
在程序的最后，你确实有一个大括号！

不是语法错误，但可能是语义错误：

if (statement.length() == 0);
{
    response = "Say something, please.";
}

仔细查看;之后的分号（if）！这个分号显示一个空语句，并且只有当{ response = ... }的条件为真时才会执行块if

这些错误很容易找到，因为我使用了一个适当的IDE，告诉我我的语法错误在哪里！

您应该考虑使用Eclipse或其他任何IDE！

有人可以帮我找到括号/括号错误的地方吗？

1 个答案: