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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Frameset//EN""http://www.w3.org/TR/REC-html40/frameset.dtd"><!--NewPage--><HTML><HEAD><!-- Generated by javadoc on Fri Sep 27 14:47:30 CDT 2002 --><TITLE>Mobile Information Device Profile 2.0: Interface UDPDatagramConnection</TITLE><LINK REL ="stylesheet" TYPE="text/css" HREF="../../../stylesheet.css" TITLE="Style"></HEAD><BODY BGCOLOR="white"><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/UDPDatagramConnection.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><strong>MIDP 2.0</strong></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <B>PREV CLASS</B> NEXT CLASS</FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="UDPDatagramConnection.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">javax.microedition.io</FONT><BR>Interface UDPDatagramConnection</H2><DL><DT><B>All Superinterfaces:</B> <DD>Connection, DatagramConnection</DD></DL><HR><DL><DT>public interface <B>UDPDatagramConnection</B><DT>extends DatagramConnection</DL><P>This interface defines a datagram connection which knows it's local end point address. The protocol is transaction oriented, and delivery and duplicate protection are not guaranteed. Applications requiring ordered reliable delivery of streams of data should use the <code>SocketConnection</code>. <p> A <code>UDPDatagramConnection</code> is returned from <code>Connector.open()</code> in response to a request to open a <code>datagram://</code> URL connection string. If the connection string omits both the <code>host</code> and <code>port</code> fields in the URL string, then the system will allocate an available port. The local address and the local port can be discovered using the accessor methods within this interface. </p> <p> The syntax described here for the datagram URL connection string is also valid for the <code>Datagram.setAddress()</code> method used to assign a destination address to a <code>Datagram</code> to be sent. e.g., <code>datagram://</code><em>host:port</em> </p> <H2> BNF Format for Connector.open() string </H2> <P> The URI must conform to the BNF syntax specified below. If the URI does not conform to this syntax, an <code>IllegalArgumentException</code> is thrown. </P> <TABLE BORDER="1"> <TR> <TD><datagram_connection_string> </TD> <TD>::= "<strong>datagram://</strong>" | "<strong>datagram://</strong>"<hostport> </TD> </TR> <TR> <TD><hostport> </TD> <TD>::= <I>host</I> ":" <I>port </I> </TD> </TR> <TR> <TD><host> </TD> <TD>::= <I>host name or IP address </I> (omitted for inbound connections) </TD> </TR> <TR> <TD><port> </TD> <TD>::= <I>numeric port number </I>(omitted for system assigned port) </TD> </TR> </TABLE><P><DL><DT><B>Since: </B><DD>MIDP 2.0</DD></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><!-- ========== METHOD SUMMARY =========== --><A NAME="method_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Method Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> String</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/io/UDPDatagramConnection.html#getLocalAddress()">getLocalAddress</A></B>()</CODE><BR> Gets the local address to which the datagram connection is bound.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> int</CODE></FONT></TD><TD><CODE><B><A HREF="../../../javax/microedition/io/UDPDatagramConnection.html#getLocalPort()">getLocalPort</A></B>()</CODE><BR> Returns the local port to which this datagram connection is bound.</TD></TR></TABLE> <A NAME="methods_inherited_from_class_javax.microedition.io.DatagramConnection"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from interface javax.microedition.io.DatagramConnection</B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>getMaximumLength, getNominalLength, newDatagram, newDatagram, newDatagram, newDatagram, receive, send</CODE></TD></TR></TABLE> <A NAME="methods_inherited_from_class_javax.microedition.io.Connection"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#EEEEFF" CLASS="TableSubHeadingColor"><TD><B>Methods inherited from interface javax.microedition.io.Connection</B></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD><CODE>close</CODE></TD></TR></TABLE> <P><!-- ============ FIELD DETAIL =========== --><!-- ========= CONSTRUCTOR DETAIL ======== --><!-- ============ METHOD DETAIL ========== --><A NAME="method_detail"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=1><FONT SIZE="+2"><B>Method Detail</B></FONT></TD></TR></TABLE><A NAME="getLocalAddress()"><!-- --></A><H3>getLocalAddress</H3><PRE>public String <B>getLocalAddress</B>() throws java.io.IOException</PRE><DL><DD>Gets the local address to which the datagram connection is bound. <P>The host address(IP number) that can be used to connect to this end of the datagram connection from an external system. Since IP addresses may be dynamically assigned, a remote application will need to be robust in the face of IP number reassignment.</P> <P> The local hostname (if available) can be accessed from <code> System.getProperty("microedition.hostname")</code> </P><DD><DL></DL></DD><DD><DL><DT><B>Returns:</B><DD>the local address to which the datagram connection is bound.<DT><B>Throws:</B><DD><CODE>java.io.IOException</CODE> - if the connection was closed.<DT><B>See Also: </B><DD><A HREF="../../../javax/microedition/io/ServerSocketConnection.html"><CODE>ServerSocketConnection</CODE></A></DL></DD></DL><HR><A NAME="getLocalPort()"><!-- --></A><H3>getLocalPort</H3><PRE>public int <B>getLocalPort</B>() throws java.io.IOException</PRE><DL><DD>Returns the local port to which this datagram connection is bound.<DD><DL></DL></DD><DD><DL><DT><B>Returns:</B><DD>the local port number to which this datagram connection is connected.<DT><B>Throws:</B><DD><CODE>java.io.IOException</CODE> - if the connection was closed.<DT><B>See Also: </B><DD><A HREF="../../../javax/microedition/io/ServerSocketConnection.html"><CODE>ServerSocketConnection</CODE></A></DL></DD></DL><!-- ========= END OF CLASS DATA ========= --><HR><!-- ========== START OF NAVBAR ========== --><A NAME="navbar_bottom"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0"><TR><TD COLSPAN=2 BGCOLOR="#EEEEFF" CLASS="NavBarCell1"><A NAME="navbar_bottom_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3"> <TR ALIGN="center" VALIGN="top"> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD> <TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="class-use/UDPDatagramConnection.html"><FONT CLASS="NavBarFont1"><B>Use</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD> <TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD> </TR></TABLE></TD><TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM><strong>MIDP 2.0</strong></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <B>PREV CLASS</B> NEXT CLASS</FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="UDPDatagramConnection.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | FIELD | CONSTR | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | CONSTR | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><font size="-1"><a href="mailto:jsr-118-comments@jcp.org">Send a comment or suggestion</a> Version 2.0 of Mobile Information Device Profile Specification<br>Java is a trademark or registered trademark of Sun Microsystems, Inc. in the US and other countries. Copyright 1993-2002 Sun Microsystems, Inc. and Motorola, Inc. All Rights Reserved. 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.</font></BODY></HTML>?? 快捷鍵說明
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