UDP传输多线程

发送和接收在一个窗口完成

        public class Demo3_MoreThread {

            /**
             * @param args
             */
            public static void main(String[] args) {
                new Receive().start();
                
                new Send().start();
            }
        
        }

        class Receive extends Thread {
            public void run() {
                try {
                    DatagramSocket socket = new DatagramSocket(6666);                    //创建socket相当于创建码头
                    DatagramPacket packet = new DatagramPacket(new byte[1024], 1024);    //创建packet相当于创建集装箱
                    
                    while(true) {
                        socket.receive(packet);                                                //接收货物
                        byte[] arr = packet.getData();
                        int len = packet.getLength();
                        String ip = packet.getAddress().getHostAddress();
                        System.out.println(ip + ":" + new String(arr,0,len));
                    }
                } catch (IOException e) {
                    
                    e.printStackTrace();
                }
            }
        }

        class Send extends Thread {
            public void run() {
                try {
                    DatagramSocket socket = new DatagramSocket();        //创建socket相当于创建码头
                    Scanner sc = new Scanner(System.in);
                    
                    while(true) {
                        String str = sc.nextLine();
                        if("quit".equals(str))
                            break;
                        DatagramPacket packet =                             //创建packet相当于创建集装箱
                                new DatagramPacket(str.getBytes(), str.getBytes().length, InetAddress.getByName("127.0.0.1"), 6666);
                        socket.send(packet);            //发货
                    }
                    socket.close();
                }  catch (IOException e) {
                    
                    e.printStackTrace();
                }
            }
        }