?? quoteserverthread.java
字號:
import java.io.*;import java.net.*;import java.util.*;public class QuoteServerThread extends Thread { private DatagramSocket socket = null; private DataInputStream in = null; private boolean moreQuotes = true; public QuoteServerThread() throws IOException { super("QuoteServerThread"); socket = new DatagramSocket(4445); try { in = new DataInputStream(new FileInputStream("one-liners.txt")); } catch (FileNotFoundException e) { System.err.println("Could not open quote file. Serving time instead."); } } public void run() { while (moreQuotes) { try { byte[] buf = new byte[256]; // receive request DatagramPacket packet = new DatagramPacket(buf, buf.length); socket.receive(packet); // figure out response String dString = null; if (in == null) dString = new Date().toString(); else dString = getNextQuote(); dString.getBytes(0, dString.length(), buf, 0); // send the response to the client at "address" and "port" InetAddress address = packet.getAddress(); int port = packet.getPort(); packet = new DatagramPacket(buf, buf.length, address, port); socket.send(packet); } catch (IOException e) { e.printStackTrace(); moreQuotes = false; } } socket.close(); } private String getNextQuote() { String returnValue = null; try { if ((returnValue = in.readLine()) == null) { in.close(); moreQuotes = false; returnValue = "No more quotes. Goodbye."; } } catch (IOException e) { returnValue = "IOException occurred in server."; } return returnValue; }}
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