Java で 2 つの絶対パスから相対パスを構築するにはどうすればよいですか?

/var/data/stuff/xyz.dat
/var/data

./stuff/xyz.dat

String path = "/var/data/stuff/xyz.dat";
String base = "/var/data";

String relative = new File(base).toURI().relativize(new File(path).toURI()).getPath();

// relative == "stuff/xyz.dat"

String path = "/var/data/stuff/xyz.dat";
String base = "/var/data";

Path basePath = Paths.get(base);
Path absPath = Paths.get(path);
Path relativePath = basePath.relativize(absPath);

// relativePath == Paths.get("stuff/xyz.dat")