当我使用BufferedWriter和FileWriter时，我在我的txt文件中得到一个中文字符。怎样才能让我的整数正确地写入"caseCountFile“？

FileWriter fileWriter = new FileWriter("caseCountFile.txt");

BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);

int caseCount = 10;
String caseCountStr = String.valueOf(caseCount);
bufferedWriter.write(caseCountStr);

bufferedWriter.close();

import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.IOException;

public class Main {
    public static void main(String[] args) {
        try {
            FileWriter fileWriter = new FileWriter("caseCountFile.txt");
            BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);

            int caseCount = 10;
            String caseCountStr = String.valueOf(caseCount);
            bufferedWriter.write(caseCountStr);

            bufferedWriter.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}