?? multicastserverthread.java
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import java.io.*;import java.net.*;import java.util.*;public class MulticastServerThread extends QuoteServerThread { private long FIVE_SECONDS = 5000; public MulticastServerThread() throws IOException { super("MulticastServerThread"); } public void run() { while (moreQuotes) { try { byte[] buf = new byte[256]; // construct quote String dString = null; if (in == null) dString = new Date().toString(); else dString = getNextQuote(); buf = dString.getBytes(); // send it InetAddress group = InetAddress.getByName("230.0.0.1"); DatagramPacket packet = new DatagramPacket(buf, buf.length, group, 4446); socket.send(packet); // sleep for a while try { sleep((long)(Math.random() * FIVE_SECONDS)); } catch (InterruptedException e) { } } catch (IOException e) { e.printStackTrace(); moreQuotes = false; } } socket.close(); }}
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