import java.io.File;
import java.io.IOException;
import java.util.Arrays;

public class Main {
  public static void main(String[] args) throws IOException {
    File myFolder = new File("myFolder");
    myFolder.mkdir();
    new File("myFolder/filename.txt").createNewFile();
    String[] names = myFolder.list();
    System.out.println(Arrays.toString(names));
  }
}