import java.net.*; import java.io.*; public class UDPServer{ public static void main(String[] args){ try{ byte[] buf = new byte[100]; DatagramPacket dp = new DatagramPacket(buf,buf.length); DatagramSocket ds = new DatagramSocket(8888); while(true){ ds.receive(dp); System.out.println(new String(buf,0,dp.getLength())); } } catch(IOException e){ e.printStackTrace(); } } }
import java.net.*; import java.io.*; public class UDPClient{ public static void main(String[] args){ try{ byte[] buf = (new String("hello!").getBytes()); DatagramPacket dp = new DatagramPacket(buf,buf.length,new InetSocketAddress("127.0.0.1",8888)); DatagramSocket ds = new DatagramSocket(9999); ds.send(dp); ds.close(); } catch(IOException e){ e.printStackTrace(); } } }