Create Socket client - Java Network

Java examples for Network:Socket

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Description

Create Socket client

Demo Code

import java.io.*;
import java.net.*;

public class EchoClient {
    public static void main(String[] args) throws IOException {

        if (args.length != 2) {
            System.err/* www . java 2  s.  c om*/
                    .println("Usage: java EchoClient <host name> <port number>");
            System.exit(1);
        }

        String hostName = args[0];
        int portNumber = Integer.parseInt(args[1]);

        try (Socket echoSocket = new Socket(hostName, portNumber);
                PrintWriter out = new PrintWriter(
                        echoSocket.getOutputStream(), true);
                BufferedReader in = new BufferedReader(
                        new InputStreamReader(echoSocket.getInputStream()));
                BufferedReader stdIn = new BufferedReader(
                        new InputStreamReader(System.in))) {
            String userInput;
            while ((userInput = stdIn.readLine()) != null) {
                out.println(userInput);
                System.out.println("echo: " + in.readLine());
            }
        } catch (UnknownHostException e) {
            System.err.println("Don't know about host " + hostName);
            System.exit(1);
        } catch (IOException e) {
            System.err.println("Couldn't get I/O for the connection to "
                    + hostName);
            System.exit(1);
        }
    }
}

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 *
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 * modification, are permitted provided that the following conditions
 * are met:
 *
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 *
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 *
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 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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 */

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