49 lines
1.4 KiB
Java
49 lines
1.4 KiB
Java
// network/ChatterClient.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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// Starts multiple clients, each of which sends datagrams.
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package network;
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import java.net.*;
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import java.io.*;
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public class ChatterClient implements Runnable {
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private InetAddress hostAddress;
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private byte[] buf = new byte[1000];
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private DatagramPacket dp =
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new DatagramPacket(buf, buf.length);
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private static int counter = 0;
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private int id = counter++;
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public ChatterClient(InetAddress hostAddress) {
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this.hostAddress = hostAddress;
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System.out.println("ChatterClient #" + id + " starting");
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}
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public void sendAndEcho(String msg) {
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try (
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// Auto-assign port number:
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DatagramSocket s = new DatagramSocket();
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) {
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// Make and send a datagram:
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s.send(Dgram.toDatagram(
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msg, hostAddress, ChatterServer.INPORT));
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// Block until it echoes back:
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s.receive(dp);
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// Display the echoed contents:
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String rcvd = "Client #" + id +
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", rcvd from " +
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dp.getAddress() + ", " +
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dp.getPort() + ": " +
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Dgram.toString(dp);
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System.out.println(rcvd);
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} catch(IOException e) {
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throw new RuntimeException(e);
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}
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}
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@Override
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public void run() {
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for(int i = 0; i <= 5; i++)
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sendAndEcho("Client #" + id + ", message #" + i);
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}
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}
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