我如何保持java程序运行(循环)，以便我可以使用扫描仪输入到相同的文本文件文本文件？

import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try {
            FileWriter writer = new FileWriter("output.txt", true); // 追加写入文件
            Scanner scanner = new Scanner(System.in);
            
            while (true) {
                System.out.println("请输入内容：");
                String input = scanner.nextLine();
                
                if (input.equals("exit")) {
                    break; // 输入exit时退出循环
                }
                
                writer.write(input + "\n");
                writer.flush();
            }
            
            writer.close();
            scanner.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try {
            FileWriter writer = new FileWriter("output.txt", true); // 追加写入文件
            Scanner scanner = new Scanner(System.in);
            
            Thread thread = new Thread(() -> {
                while (true) {
                    System.out.println("请输入内容：");
                    String input = scanner.nextLine();
                    
                    if (input.equals("exit")) {
                        break; // 输入exit时退出循环
                    }
                    
                    try {
                        writer.write(input + "\n");
                        writer.flush();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                
                try {
                    writer.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            });
            
            thread.setDaemon(true); // 设置为后台线程
            thread.start();
            
            // 主线程继续执行其他操作
            // ...
            
            scanner.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}