Question

我正在尝试在文本文件中找到关键字，如果找到则返回该句子。如果找不到关键字，我想调用Writer方法。但由于某种原因，Writer方法总是运行。

需要更改哪些内容才能确保仅在找不到关键字时调用writer方法？

这是我的代码

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;
}

这是我的主要方法和Writer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

    Scanner in = new Scanner(System.in);
    Scanner scanner = new Scanner(System.in);
    String input = null;

    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(" ");

    boolean found = false;
    for(String ing : inputs){ //iterate over each word of the sentence.
        for (Map.Entry<String, String[]> entry : synonymMap.entrySet()) {
            String key = entry.getKey();
            String[] value = entry.getValue();
            if (key.equals(ing) || Arrays.asList(value).contains(ing)) {

                    found = true;
                    parseFile(entry.getKey());

                    System.out.println(" Would you like to update this information ? "); 
                String yellow = in.nextLine(); 
                if (yellow.equals("yes")) {
                    removedata(entry.getKey());
                }
                if (yellow.equals("no")) {
                    System.out.println("Have a good day"); 
                    break;
                }


                    break;
                    //System.out.println("Have a good day!");
                   // break;
            }
        }
        if(found){
             Writer();
        }   
    }
}
}


 public static void Writer() {
    boolean endofloop = false;
    Scanner Keyboard = new Scanner(System.in);
    Scanner input = new Scanner(System.in);

    File file = new File("data.txt");
    try (BufferedWriter wr = new BufferedWriter(new FileWriter(
            file.getAbsoluteFile(), true))) { // Creates a writer object
                                                // called wr
                                                // file.getabsolutefile
                                                // takes the filename and
                                                // keeps on storing the old
        System.out.println("I do not know, Perhaps you wanna help me learn?"); // data
        while ((Keyboard.hasNext())) {

            String lines = Keyboard.nextLine();
            System.out.print(" is this correct ? ");
            String go = input.nextLine();

            if (go.equals("no")) {
                System.out.println("enter what you want to teach me");
                lines = Keyboard.nextLine();
                System.out.print(" is this correct ? ");
                go = input.nextLine();
            }

            if (go.equals("yes")) {
                wr.write(lines);
                wr.write("\n");

                wr.newLine();

                wr.close();
            }

            System.out.println("Thankk you");
            break;
        }
    } catch (IOException e) {
        System.out.println(" cannot write to file " + file.toString());
    }
}

Answer 1

如果您想在未找到的情况下调用编写器，则必须使用：

if (!found) writer();

你的休息只是终止内循环，你可能想要添加一个

if (found) break;

也可以终止外部循环（你没有说这是否是必需的）。

if语句的问题

1 个答案: