Hi all.
I'm trying to create a server/client program in java for an assignment. I'm struggling to get the receiver thread working, which I want to do before I implement the more complex features, but I keep tripping up with the receiver. The sender will send the message, the server can read it, but the receiver thread causes the client program to brick every time with a NPE right on the socket.receive(packet);
public class CReceiveThread implements Runnable {
public static final int MAX_PACKET_SIZE = 65507;
DatagramSocket socket;
InetAddress address;
byte[] buf = new byte[MAX_PACKET_SIZE];
String host = "127.0.0.1";
@Override
public void run() {
// TODO Auto-generated method stub
// receive request from client
System.out.println("client: waiting to receive datagram..");
DatagramPacket packet = new DatagramPacket(buf, buf.length);
try {
Thread.sleep(5000);
socket.receive(packet);
} catch (IOException | InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("client: datagram received..");
buf = packet.getData();
String message = new String(packet.getData());
message = message.trim();
System.out.println("Message Received from Server:" + message);
}
