Time Server
/*
J2ME in a Nutshell
By Kim Topley
ISBN: 0-596-00253-X
*/
import java.io.IOException;
import java.util.Calendar;
import java.util.Date;
import javax.microedition.io.Connector;
import javax.microedition.io.Datagram;
import javax.microedition.io.DatagramConnection;
public class TimeServer {
public static void main(String[] args) {
try {
Calendar cal = Calendar.getInstance();
DatagramConnection receiver =
(DatagramConnection)Connector.open("datagram://:13");
byte[] buffer = new byte[256];
Datagram dgram = receiver.newDatagram(buffer, buffer.length);
for (;;) {
dgram.setLength(buffer.length);
// Wait for somebody to call...
receiver.receive(dgram);
// Get the time and store it in the buffer
cal.setTime(new Date());
String time = cal.toString();
byte[] dataBytes = time.getBytes();
System.arraycopy(dataBytes, 0, buffer, 0, dataBytes.length);
// Send back the reply
dgram.setLength(dataBytes.length);
receiver.send(dgram);
}
} catch (IOException ex) {
System.out.println("IOException: " + ex);
}
}
}
Related examples in the same category
