OBS: Código testaro na versão Javac 1.7.0_09

UrlProcessor.java

class UrlProcessor{

	public void detalhamentoUrl(String site){
		try{
			if(site.substring(0, 3).equals("htt")){
				java.net.URL url = new java.net.URL(site);

	        	String path = url.toURI().getPath().substring(1, url.getPath().length());
	        	System.out.println("protocolo: "+url.getProtocol());
	        	System.out.println("host: "+url.getHost().substring(0,3));
	        	System.out.println("domínio: "+url.getHost().substring(4, url.getHost().length()));
	        	System.out.println("path: "+path.split("/")[0]);
	        	System.out.println("parâmetros: "+path.split("/")[1]);
	        	System.out.println("--------");
			}else{
				System.out.println(site.substring(0, 3));
				System.out.println(site.split("://")[1].split("%")[0]);
        		System.out.println(site.split("%")[1].split("@")[0]);
        		System.out.println(site.split("@")[1]);
        		System.out.println("--------");
			}

		}catch(java.io.IOException e){
			e.getMessage();

		}catch(java.net.URISyntaxException e ){
			e.getMessage();
		}catch(Exception e){System.out.println("URL inválida!");}

	}

	public static void main(String[] args){
		UrlProcessor processor = new UrlProcessor();
		processor.detalhamentoUrl("http://www.google.com/mail/user=fulano");
		processor.detalhamentoUrl("ssh://fulano%senha@git.com/");
		processor.detalhamentoUrl("13h23u4gu2yq3g4q");
	}
}