(Java)检测转换为字符的InputStream中的回车

import java.io.*;

public class Main {
    public static void main(String[] args) {
        try {
            InputStream inputStream = new FileInputStream("input.txt");
            InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
            BufferedReader bufferedReader = new BufferedReader(inputStreamReader);

            String line;
            while ((line = bufferedReader.readLine()) != null) {
                if (line.contains("\r")) {
                    System.out.println("存在回车字符");
                } else {
                    System.out.println("不存在回车字符");
                }
            }

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