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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 Thu Apr 27 23:35:34 PDT 2000 --><TITLE>Java 2 Platform SE v1.3: Class Socket</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/Socket.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-files/index-1.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><b>Java<sup><font size=-2>TM</font></sup> 2 Platform<br>Std. Ed. v1.3</b></EM></TD></TR><TR><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../java/net/ServerSocket.html"><B>PREV CLASS</B></A> <A HREF="../../java/net/SocketImpl.html"><B>NEXT CLASS</B></A></FONT></TD><TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2"> <A HREF="../../index.html" TARGET="_top"><B>FRAMES</B></A> <A HREF="Socket.html" TARGET="_top"><B>NO FRAMES</B></A></FONT></TD></TR><TR><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2"> SUMMARY: INNER | FIELD | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD><TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">DETAIL: FIELD | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD></TR></TABLE><!-- =========== END OF NAVBAR =========== --><HR><!-- ======== START OF CLASS DATA ======== --><H2><FONT SIZE="-1">java.net</FONT><BR>Class Socket</H2><PRE><A HREF="../../java/lang/Object.html">java.lang.Object</A> | +--<B>java.net.Socket</B></PRE><HR><DL><DT>public class <B>Socket</B><DT>extends <A HREF="../../java/lang/Object.html">Object</A></DL><P>This class implements client sockets (also called just "sockets"). A socket is an endpoint for communication between two machines. <p> The actual work of the socket is performed by an instance of the <code>SocketImpl</code> class. An application, by changing the socket factory that creates the socket implementation, can configure itself to create sockets appropriate to the local firewall.<P><DL><DT><B>Since: </B><DD>JDK1.0</DD><DT><B>See Also: </B><DD><A HREF="../../java/net/Socket.html#setSocketImplFactory(java.net.SocketImplFactory)"><CODE>setSocketImplFactory(java.net.SocketImplFactory)</CODE></A>, <A HREF="../../java/net/SocketImpl.html"><CODE>SocketImpl</CODE></A></DL><HR><P><!-- ======== INNER CLASS SUMMARY ======== --><!-- =========== FIELD SUMMARY =========== --><!-- ======== CONSTRUCTOR SUMMARY ======== --><A NAME="constructor_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%"><TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor"><TD COLSPAN=2><FONT SIZE="+2"><B>Constructor Summary</B></FONT></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected </CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/Socket.html#Socket()">Socket</A></B>()</CODE><BR> Creates an unconnected socket, with the system-default type of SocketImpl.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> </CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/Socket.html#Socket(java.net.InetAddress, int)">Socket</A></B>(<A HREF="../../java/net/InetAddress.html">InetAddress</A> address, int port)</CODE><BR> Creates a stream socket and connects it to the specified port number at the specified IP address.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> </CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/Socket.html#Socket(java.net.InetAddress, int, boolean)">Socket</A></B>(<A HREF="../../java/net/InetAddress.html">InetAddress</A> host, int port, boolean stream)</CODE><BR> <B>Deprecated.</B> <I>Use DatagramSocket instead for UDP transport.</I></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> </CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/Socket.html#Socket(java.net.InetAddress, int, java.net.InetAddress, int)">Socket</A></B>(<A HREF="../../java/net/InetAddress.html">InetAddress</A> address, int port, <A HREF="../../java/net/InetAddress.html">InetAddress</A> localAddr, int localPort)</CODE><BR> Creates a socket and connects it to the specified remote address on the specified remote port.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE>protected </CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/Socket.html#Socket(java.net.SocketImpl)">Socket</A></B>(<A HREF="../../java/net/SocketImpl.html">SocketImpl</A> impl)</CODE><BR> Creates an unconnected Socket with a user-specified SocketImpl.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> </CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/Socket.html#Socket(java.lang.String, int)">Socket</A></B>(<A HREF="../../java/lang/String.html">String</A> host, int port)</CODE><BR> Creates a stream socket and connects it to the specified port number on the named host.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> </CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/Socket.html#Socket(java.lang.String, int, boolean)">Socket</A></B>(<A HREF="../../java/lang/String.html">String</A> host, int port, boolean stream)</CODE><BR> <B>Deprecated.</B> <I>Use DatagramSocket instead for UDP transport.</I></TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> </CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/Socket.html#Socket(java.lang.String, int, java.net.InetAddress, int)">Socket</A></B>(<A HREF="../../java/lang/String.html">String</A> host, int port, <A HREF="../../java/net/InetAddress.html">InetAddress</A> localAddr, int localPort)</CODE><BR> Creates a socket and connects it to the specified remote host on the specified remote port.</TD></TR></TABLE> <!-- ========== 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> void</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/Socket.html#close()">close</A></B>()</CODE><BR> Closes this socket.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../java/net/InetAddress.html">InetAddress</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/Socket.html#getInetAddress()">getInetAddress</A></B>()</CODE><BR> Returns the address to which the socket is connected.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../java/io/InputStream.html">InputStream</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/Socket.html#getInputStream()">getInputStream</A></B>()</CODE><BR> Returns an input stream for this socket.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> boolean</CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/Socket.html#getKeepAlive()">getKeepAlive</A></B>()</CODE><BR> Tests if SO_KEEPALIVE is enabled.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../java/net/InetAddress.html">InetAddress</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/Socket.html#getLocalAddress()">getLocalAddress</A></B>()</CODE><BR> Gets the local address to which the socket 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="../../java/net/Socket.html#getLocalPort()">getLocalPort</A></B>()</CODE><BR> Returns the local port to which this socket is bound.</TD></TR><TR BGCOLOR="white" CLASS="TableRowColor"><TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1"><CODE> <A HREF="../../java/io/OutputStream.html">OutputStream</A></CODE></FONT></TD><TD><CODE><B><A HREF="../../java/net/Socket.html#getOutputStream()">getOutputStream</A></B>()</CODE><BR> Returns an output stream for this socket.</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="../../java/net/Socket.html#getPort()">getPort</A></B>()</CODE><BR> Returns the remote port to which this socket is connected.</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="../../java/net/Socket.html#getReceiveBufferSize()">getReceiveBufferSize</A></B>()</CODE>⌨️ 快捷键说明
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