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How to receive datagrams in a mobile application |
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The following J2ME code snippet shows how to receive datagrams
in a mobile application. To receive a datagram, you first have to
allocate a Datagram object with a buffer large enough for the
data that you expect to receive.
DatagramConnection receiver =
(DatagramConnection)Connector.open("datagram://:32767");
byte[] buffer = new byte[256];
Datagram dgram = receiver.newDatagram(buffer, buffer.length);
for (;;) {
dgram.setLength(buffer.length);
receiver.receive(dgram);
int length = dgram.getLength( );
System.out.println("Datagram received. Length is " + length);
// Show the content of the datagram.
for (int i = 0; i < length; i++) {
System.out.print(buffer[i] + " ");
}
}
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