Java URL builder

Create and modify URLs and URL parameters easily, with a builder class.

UrlBuilder.fromString("http://www.google.com/")
    .addParameter("q", "charlie brown")
    .toString() == "http://www.google.com/?q=charlie+brown"

UrlBuilder.fromString("http://foo/h%F6pl%E4", "ISO-8859-1")
    .encodeAs("UTF-8")
    .toString() == "http://foo/h%C3%B6pl%C3%A4"

final UrlBuilder ub1 = UrlBuilder.fromEmpty()
    .withProtocol("http")
    .withHost("www.example.com")
    .withPath("/")
    .addParameter("foo", "bar");

final java.net.URI uri1 = ub1.toUri();

try {
    final java.net.URI uri2 = ub1.toUriWithException();
} catch (java.net.URISyntaxException ex) {
    // handle the exception
}

final java.net.URL url1 = ub1.toUrl();

try {
    final java.net.URL url2 = ub1.toUrlWithException();
} catch (java.net.MalformedURLException ex) {
    // handle the exception
}

Todo:

• More unit tests for corner cases
• Preserve URL property order