Java Learning Note (59)-Socket programming

Client

ImportJava.io.IOException;ImportJava.net.DatagramPacket;ImportJava.net.DatagramSocket;Importjava.net.InetAddress;ImportJava.net.UnknownHostException;/ * * Client * * Public  class Client {     Public Static void Main(string[] args)throwsIOException {/ * * Send data to server */        //1. Define the server's address, port, dataInetAddress address = Inetaddress.getbyname ("127.0.0.1");intPort =8800;byte[] data ="Have you been 2 today?" ". GetBytes ();//2. Create a datagram that contains the data information sentDatagrampacket packet =NewDatagrampacket (data, data.length, address, Port);//3. Create a Datagramsocket objectDatagramsocket socket=NewDatagramsocket ();//4. Send DatagramsSocket.send (packet);/ * * Receive server-side response data */        //1. Creating a datagram for receiving data that stores a response        byte[] data2=New byte[1024x768]; Datagrampacket packet2=NewDatagrampacket (data2, data2.length);//2. Receiving response DataSocket.receive (Packet2);//3. Reading dataString info=NewString (Data2,0, Packet2.getlength ()); System.out.println ("I'm the client," said the server .+info);//4. Closing ResourcesSocket.close (); }}

Service side

ImportJava.io.IOException;ImportJava.net.DatagramPacket;ImportJava.net.DatagramSocket;Importjava.net.InetAddress;/* * Server side * * Servers must be started earlier than client */ Public  class Server {     Public Static void Main(string[] args)throwsIOException {/ * * Receive data sent by client */        //1. Create a server-side datagramsocket, specify the portDatagramsocket socket =NewDatagramsocket (8800);//2. Create datagrams to receive data sent by the storage client        byte[] data =New byte[1024x768]; Datagrampacket packet =NewDatagrampacket (data, data.length);//3. Receive DataSocket.receive (packet);//4. Reading dataString info =NewString (data,0, Packet.getlength ()); System.out.println ("I am the server," said the client, "+ info);/ * * Response client * /        //1. Define the address, port, and data of the clientInetAddress address = packet.getaddress ();intPort = Packet.getport ();byte[] Data2 ="2, What about you?" ". GetBytes ();//2. Create a datagram that contains the data information for the responseDatagrampacket Packet2 =NewDatagrampacket (Data2, Data2.length, address, Port);//3. Responding to clientsSocket.send (Packet2);//4. Closing ResourcesSocket.close (); }}

Java Learning Note (59)-Socket programming