P ROGRAMAÇÃO DE S OCKET UDP - S ERVER import java.net.*; class UDPserver { public static void main(String args[]) throws Exception { DatagramSocket serverSocket = new DatagramSocket(5000); byte[] receiveData = new byte[1024] ; byte[] sendData = new byte[1024]; String inFromClient, outToClient; InetAddress clientIP; int port; while(true) { //pacote a ser recebido DatagramPacket receivePacket = new DatagramPacket(receiveData, receiveData.length); serverSocket.receive(receivePacket); //recebendo o pacotes inFromClient = new String(receivePacket.getData()); //colocando na string os dados recebidos clientIP = receivePacket.getAddress(); //pegando o IP e porta do pacote que chegou port = receivePacket.getPort(); outToClient = inFromClient.toUpperCase(); sendData = outToClient.getBytes(); //enviando pacote de resposta DatagramPacket sendPacket = new DatagramPacket(sendData, sendData.length, clientIP, port); serverSocket.send(sendPacket); } 8