每次添加到文件時，如何阻止我的文件被覆蓋？

Question

我正在嘗試將玩家列表添加到文件中，以便我可以存儲它們並在需要時調用它們。

我已經設法寫入文件，但每次重新寫入文件時，最后一個文件條目都會被覆蓋。 有沒有人知道如何將每個條目保存到文件中而不會每次都被覆蓋？

任何幫助將不勝感激

提前致謝！！！！！！

package p;

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

public class Runner {

    public static final Scanner input = new Scanner(System.in);

    public static void main(String[] args) throws IOException {
        FileWriter writer = new FileWriter("output.txt");
        PlayerData player = null;
        List<PlayerData> players = new ArrayList<>();

        System.out.println("How many players do you want to register? : ");
        int num = input.nextInt();

        while (true) {

            System.out.println("Plz enter Name : ");
            String name = input.next();
            writer.write("Name: " + name + System.lineSeparator());

            System.out.println("Plz enter age : ");
            String age = input.next();
            writer.write("Age: " + age + System.lineSeparator());

            System.out.println("Plz enter Player_id : ");
            String player_id = input.next();
            writer.write("Player_id: " + player_id + System.lineSeparator());

            System.out.println("Plz enter agent_id : ");
            String agent_id = input.next();
            writer.write("Agent_id:" + agent_id + System.lineSeparator());

            System.out.println("Plz enter status : ");
            String status = input.next();
            writer.write("Status: " + status + System.lineSeparator());

            System.out.println("Plz enter position : ");
            String position = input.next();
            writer.write("Position: " + position + System.lineSeparator());

            System.out.println("Plz enter valuation : ");
            Double valuation = input.nextDouble();
            writer.write("Value: " + valuation + System.lineSeparator());

            System.out.println("\n");
            player = new PlayerData(name, age, player_id, agent_id, valuation, status, position);
            players.add(player);

            System.out.println("Information Entered: \n" + player + "\n" + "Name : " + name + "\n" + "Age: " + age
                    + "Player id: " + player_id + "\n" + "Agent id: " + agent_id + "\n" + "Player Value: " + valuation
                    + "\n" + "Player Status:" + status + "\n" + "Player position:" + position + "\n");

            writer.close();
            if (players.size() == num)

                break;
        }

        System.out.println(players);

    }

}

Answer 1

FileWriter writer = new FileWriter("output.txt", true);