Java I/O - 如何获取子路径

import java.net.URI;
import java.nio.file.FileSystems;
import java.nio.file.Path;
import java.nio.file.Paths;

public class Main {

  public static void main(String[] args) throws Exception {
    Path path = Paths.get("/home", "docs", "users.txt");
    System.out.println("subpath: " + path.subpath(0, 3));

  }
}