有关java的uri的一些理解

public class URIMain {
    
    public static final String DEFAULT_BROKER_BIND_URL = "tcp://localhost:61616";
    public static final String DEFAULT_BROKER_URL = "failover://"+DEFAULT_BROKER_BIND_URL;

    /**
     * @param args
     */
    public static void main(String[] args) throws Exception{
        String url="http://www.baidu.com?a=b&b=c";
        
        String url1="http://127.0.0.1";
        URI uri=new URI(url);
        
        System.out.println(uri.getScheme());
        System.out.println(aauri.getHost());
        System.out.println(uri.getPath());
        System.out.println(uri.getQuery());
        System.out.println(uri.getPort());

    }
}