Hashmaps的问题

Question

我在尝试迭代一个句子时遇到了一个问题，这个句子是用户为我的HashMap中的匹配词输入的。例如，如果用户输入“I is reading with the professor”。教授是关键字。我想扫描用户输入的关键字professor或它在HashMap中的同义词的句子。到目前为止，当我运行我的程序时，代码只是挂起。

下面是我的主要方法：

public static void main(String args[]) throws ParseException, IOException {
/* Initialization */
    HashMap<String, String[]> synonymMap = new HashMap<String, String[]>();
    synonymMap= populateSynonymMap(); //populate the map
    System.out.println("Welcome To DataBase ");
    System.out.println("What would you like to know?");

    System.out.print("> ");
    input = scanner.nextLine().toLowerCase();
    String[] inputs = input.split(" "); //Here split the sentence to words.

    for (String in : inputs) { //iterate over each word of the sentence.
        if (synonymMap.containsValue(in)) { //check if the values of synonymMap has the string in.
            for (Map.Entry<String, String[]> entry : synonymMap.entrySet()) {
                String[] value = entry.getValue();
                if (Arrays.asList(value).contains(in)) {
                    parseFile(entry.getKey());
                    System.out.println("Have a good day!");
                    break;
                }
            }
            break;
        }
    }
}

和我的hashmap方法：

private static HashMap<String, String[]> populateSynonymMap() {
    responses.put("professor", new String[]{"instructor", "teacher", "mentor"});
    responses.put("book", new String[]{"script", "text", "portfolio"});
    responses.put("office", new String[]{"room", "post", "place"});
    responses.put("day", new String[]{"time",  "date"});
    responses.put("asssignment", new String[]{"homework", "current assignment "});
    responses.put("major", new String[]{"discipline", "focus"," study"});


    return responses;
}

Parsefile检查文本文件中的单词并返回句子

public static void parseFile（String%s）抛出FileNotFoundException{File File=new File（“data.txt”）；

    Scanner scanner = new Scanner(file);
    while (scanner.hasNextLine()) {
        final String lineFromFile = scanner.nextLine();
        if (lineFromFile.contains(s)) {
            // a match!
            System.out.println(lineFromFile);
            // break;
        }

    }
}

Answer 1

注意代码中输入和synonymMap的类型：

HashMap<String, String[]> synonymMap = new HashMap<String, String[]>();
// ... more code ...
for (String in : inputs) { //iterate over each word of the sentence.

因此,这将始终返回false：

if (synonymMap.containsValue(in)) { //check if the values of synonymMap has the string in.

现在，您需要：

扫描用户输入的句子，查找关键字professor或它在HashMap中的同义词。

这个棘手的“或”意味着您需要同时检查关键字和值是否匹配，因为关键字值不在它们的列表值中，因为这将是多余的。因此，在for(String in:inputs)中，您应该具有：

boolean found = false;
for (Map.Entry<String, String[]> entry : synonymMap.entrySet()) {
    String key = entry.getKey();
    String[] value = entry.getValue();
    if (key.equals(in) || Arrays.asList(value).contains(in)) {
        found = true;
        parseFile(key);
        System.out.println("Have a good day!");
        break;
    }
}
if (found) {
    break;
}