code: @Test public void testUserNamePasswordContainsAt(){
    URL url=URL.valueOf("ad@min:hello@1234@10.20.130.230:20880/context/path?version=1.0.0&application=morgan");
    assertNull(url.getProtocol());
    assertEquals("ad@min",url.getUsername());
    assertEquals("hello@1234",url.getPassword());
    assertEquals("10.20.130.230",url.getHost());
    assertEquals(20880,url.getPort());
    assertEquals("context/path",url.getPath());
    assertEquals(2,url.getParameters().size());
    assertEquals("1.0.0",url.getParameter("version"));
    assertEquals("morgan",url.getParameter("application"));
  }
  