尝试通过用户输入获取文件名，如果说“不”则打印消息想要写入文件

Question

因此，如果用户想写入文件，我会尝试写一个文件名，并在不想写入文件的控制台ID中写“感谢您的播放”。

但是，无论我是输入“是”或“否”，它都不会给出文件提示，或者根据我的何处，将其打印的名称和年龄打印成无限循环。

我将在下面发布有关代码。

    String answer2;
    String write;
    String fileName;
    
    ArrayList<String> names = new ArrayList<>();
    ArrayList<String> ages = new ArrayList<>();


    // If I put it here, it will do a infinite loop of the names and ages inputted.
    // Prompt the user if they want to write to a file.
    System.out.println("Do you want to write to a file? ");
    answer2 = keyboard.nextLine();

    do
    {
     // If I put it here, it will continue to ask me the question infinitely.
              // Prompt the user if they want to write to a file.
              // System.out.println("Do you want to write to a file? ");
              //answer2 = keyboard.nextLine();
    }
    while (answer.equals("no"));

    do
    {
        // Prompt for the filename
        System.out.println("Enter your filename: ");
        fileName = keyboard.nextLine();
        //break;
        
        //PrintWriter outputFile;
        try 
        {
            PrintWriter outputFile = new PrintWriter(fileName);
            
            // Write the name(s) and age(s) to the file
            outputFile.println(names);
            outputFile.println(ages);
            
            outputFile.close();
        } 
        
        catch (FileNotFoundException e) 
        {
            // 
            e.printStackTrace();
            break;
        }
    }   
    
    while (answer2.equals("yes"));
    
    do
    {
        System.out.println("Thanks for playing!");
        break;
    }
    
    while (answer2.equals("no"));
    keyboard.close();

Answer 1

do/while循环做。好吧，如果需要，请使用字典。它显然循环。它一直在括号中进行操作，直到wher子句不再是真的。您的代码将不断询问。

如果，则需要，而不是do/while循环。