question: public static URI parseURI ( String nuri , URI baseuri ) throws URISyntaxException { int colonLocation = nuri . indexOf ( ':' ) ; int fragmentLocation = getFragmentLocation ( nuri ) ; if ( colonLocation == - 1 || colonLocation > fragmentLocation ) { if ( baseuri == null ) throw new URISyntaxException ( "No ':' in \"" + nuri + "\" and no base URI given," + " so no relative URIs allowed" , nuri ) ; } String protocol = nuri . substring ( 0 , colonLocation ) ; if ( protocol . equals ( "urn" ) ) { return parseURN ( nuri , colonLocation , fragmentLocation ) ; } else if ( protocol . equals ( "http" ) ) { return new URI ( nuri ) ; } else if ( protocol . equals ( "file" ) ) { return new URI ( nuri ) ; } else if ( protocol . equals ( "res" ) ) { return new URI ( nuri ) ; } else { return parseGeneralURI ( nuri , colonLocation , fragmentLocation ) ; } }
target:  Constructs an URI from a String