URLStreamHandlerFactory.java

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package java.net;

/**
 * This interface defines a factory for {@code URL} stream
 * protocol handlers.
 *
 * <p> A URL stream handler factory is used as specified in the
 * {@linkplain java.net.URL#URL(String, String, int, String) URL constructor}.
 *
 * @author Arthur van Hoff
 * @see java.net.URL
 * @see java.net.URLStreamHandler
 * @since 1.0
 */
// 流协议处理器工厂
public interface URLStreamHandlerFactory {
    /**
     * Creates a new {@code URLStreamHandler} instance with the specified
     * protocol.
     *
     * @param protocol the protocol ("{@code ftp}",
     *                 "{@code http}", "{@code nntp}", etc.).
     *
     * @return a {@code URLStreamHandler} for the specific protocol, or {@code
     * null} if this factory cannot create a handler for the specific
     * protocol
     *
     * @see java.net.URLStreamHandler
     */
    // 返回指定协议对应的流协议处理器
    URLStreamHandler createURLStreamHandler(String protocol);
}