EDIT

    @Test

    public void testFragment() {

        try {

            //see example in #9111

            URI uri = new URI("https://max:muster@www.example.com:8080/index.html?p1=A&p2=B#ressource");

            Assert.assertEquals(

                    "ressource",

                    uri.getFragment());

        } catch (URISyntaxException e) {

            Assert.fail("Parsing example URI should find fragment");

        }

        try {

            //see example in #9111

            URI uri = new URI("http:\\www.fail.de");

            Assert.fail("Using backslash in URI instead of slash should fail");

        } catch (URISyntaxException e) {

            //OK

        }

    }