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25 
26 package java.net;
27 
28 /**
29  * This interface defines a factory for {@code URL} stream
30  * protocol handlers.
31  *
32  * <p> A URL stream handler factory is used as specified in the
33  * {@linkplain java.net.URL#URL(String,String,int,String) URL constructor}.
34  *
35  * @author  Arthur van Hoff
36  * @see     java.net.URL
37  * @see     java.net.URLStreamHandler
38  * @since   1.0
39  */
40 public interface URLStreamHandlerFactory {
41     /**
42      * Creates a new {@code URLStreamHandler} instance with the specified
43      * protocol.
44      *
45      * @param   protocol   the protocol ("{@code ftp}",
46      *                     "{@code http}", "{@code nntp}", etc.).
47      * @return  a {@code URLStreamHandler} for the specific protocol, or {@code
48      *          null} if this factory cannot create a handler for the specific
49      *          protocol
50      * @see     java.net.URLStreamHandler
51      */
createURLStreamHandler(String protocol)52     URLStreamHandler createURLStreamHandler(String protocol);
53 }
54