java - for 循环后输入未写入文件

Question

导入java.util.Scanner; 导入java.io.*;

公共(public)类 Kazarian_MadLibs {

public static void main(String[] args) throws IOException {

    Scanner keyboard = new Scanner(System.in);

    File file = new File("Mad Libs 1.txt");

    Scanner inputFile = new Scanner(file);

    System.out.println("Please provide a word for each of the following: ");

    PrintWriter answers = new PrintWriter("answers.txt");

    inputFile.nextLine();

    for (int i = 0; i < 18; i++)
    {   
        System.out.println(inputFile.nextLine());
        keyboard.next();
        answers.println(keyboard.nextLine());
        answers.close();

    }

for 循环执行完所有 18 行后，它不会将我的任何答案写入“answers.txt”文件。我在这里做错了什么？谢谢

Answer 1

将 close 语句移出 for 循环，这样就不会在每次迭代中关闭 PrintWriter。此外，您每次迭代都会从 Scanner 实例读取两次 - 只需读取一次值并写入文件

for (int i = 0; i < 18; i++) {
    System.out.println(inputFile.nextLine());
    String answer = keyboard.nextLine(); // Assign variable here
    answers.println(answer);
}

answers.close();