crea un lector de ficheros .txt

public class ReadFile {
  // Método que lee un fichero de texto
  public void readFile(String fileName) {
    File file = new File(fileName);
    BufferedReader bf = new BufferedReader(new FileReader(file));
    String line = bf.readLine();
    while (line != null) {
      System.out.println(line);
      line = bf.readLine();
    }
    bf.close();
  }
  // Método principal de la clase
  public static void main(String[] args) {
    ReadFile file = new ReadFile();
    file.readFile("file.txt");
  }
}