import java.io.FileDescriptor;
import java.io.FileOutputStream;
import java.io.IOException;

public class Main {
  public static void main(String[] args) throws IOException {
    FileOutputStream output = new FileOutputStream("filename.txt");
    FileDescriptor fd = output.getFD();
    System.out.println(fd.valid());
    output.close();
    System.out.println(fd.valid());
  }
}