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/* Angelehnt an Kurose/Ross Computernetzwerke (bis 5e Java, ab 6e Python) */
package verteiltesysteme.socket.simple;
import java.net.*;
class UDPServer { public static void main(String args[]) throws Exception { int udpPort = 36037; @SuppressWarnings("resource") DatagramSocket serverSocket = new DatagramSocket(udpPort); byte[] receiveData = new byte[1024]; byte[] sendData = new byte[1024];
while (true) { DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length); serverSocket.receive(receivePacket); String sentence = new String(receivePacket.getData(), 0, receivePacket.getLength());
InetAddress IPAddress = receivePacket.getAddress(); int clientSrcPort = receivePacket.getPort();
String capitalizedSentence = sentence.toUpperCase(); sendData = capitalizedSentence.getBytes(); DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, IPAddress, clientSrcPort); serverSocket.send(sendPacket); } } }
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