Java sockets for full-duplex communication

Java sockets for full-duplex communication

Simplex, half-duplex, and full-duplex definitions

If at any point in the communication process, the information can only be transmitted by a Party A to the other party B, it is called Simplex.

If at any time, the information can be transmitted from a to B, but also by a B, but only in one direction of the transmission exists, called half-duplex transmission.

If at any point there is a bidirectional signal transmission of A to B and B to a on the line, it is called full duplex.

A simple interface with swing enables full-duplex communication between client and server.

Server-side code:

Package Cn.cblue.net1;import Java.awt.borderlayout;import Java.awt.event.actionevent;import Java.awt.event.actionlistener;import Java.awt.event.keyevent;import Java.awt.event.keylistener;import Java.io.bufferedreader;import Java.io.ioexception;import Java.io.inputstreamreader;import Java.io.PrintWriter; Import Java.net.serversocket;import java.net.socket;import Javax.swing.jbutton;import Javax.swing.JFrame;import Javax.swing.jpanel;import javax.swing.jscrollpane;import Javax.swing.jtextarea;import javax.swing.JTextField;/** * @Description: Service side * @author HUANGZJB [email protected] * @Company Digital China * @date 2014-6-4 pm 02:18:06 * @versio N 1.0 */public Class MyServer extends JFrame implements ActionListener {JTextArea JTA = null; JTextField JTF = null; JButton JB = null; JPanel JP1 = null; JScrollPane jsp = null; PrintWriter pw = null;public static void Main (string[] args) {new MyServer ();} Public MyServer () {JTA = new JTextArea (); jsp = new JScrollPane (JTA); JTF = new JTextField (10);Register Carriage return Event Jtf.addkeylistener (new KeyListener () {@Overridepublic void keytyped (KeyEvent e) {} @Overridepublic void keyreleased (KeyEvent e) {} @Overridepublic void keypressed (KeyEvent e) {if (e.getkeycode () = = Keyevent.vk_enter) { SendMessage ();}}); JB = new JButton ("send"); Jb.addactionlistener (this);//Register a listener event JP1 = new JPanel (); Jp1.add (JTF); Jp1.add (JB); This.add (JSP , borderlayout.center); This.add (JP1, Borderlayout.south); This.settitle ("Chat server"); This.setsize (300, 200); This.setvisible (TRUE);//Receive messages sent over from the client try {serversocket SS = new ServerSocket (2222); Socket s = ss.accept (); BufferedReader in = new BufferedReader (New InputStreamReader (S.getinputstream ()));p w = new PrintWriter ( S.getoutputstream (), true);//write PW = new PrintWriter (S.getoutputstream ()) There will be a problem while (true) {String info = in.readline (); String str = null;if (jta.gettext () = = NULL | | "". Equals (Jta.gettext ())) {str = "Server:" + info;} else {str = Jta.gettext () + "\r\nserver:" + info;} Jta.settext (str); Jta.setcaretposition (jta.getdocumenT (). GetLength ());}} catch (IOException e) {//TODO auto-generated catch Blocke.printstacktrace ();}} Send information to client @overridepublic void actionperformed (ActionEvent e) {//TODO auto-generated method Stubif (e.getsource () = = JB) {sendMessage ();}} /** * @Description: Send message to client * @throws */public void SendMessage () {String info = jtf.gettext ();p w.println (info);p W.flush ( ); Jtf.settext (""); if (jta.gettext () = = NULL | | "". Equals (Jta.gettext ())) {Jta.append ("Client:" + info);} else {jta.append ("\r\nclient:" + info);} Jta.setcaretposition (Jta.getdocument (). GetLength ());//Set scroll bar auto-scroll}}

Client-side code:

Package Cn.cblue.net1;import Java.awt.borderlayout;import Java.awt.event.actionevent;import Java.awt.event.actionlistener;import Java.awt.event.keyevent;import Java.awt.event.keylistener;import Java.io.bufferedreader;import Java.io.ioexception;import Java.io.inputstreamreader;import Java.io.PrintWriter; Import Java.net.socket;import javax.swing.jbutton;import Javax.swing.jframe;import Javax.swing.jpanel;import Javax.swing.jscrollpane;import javax.swing.jtextarea;import javax.swing.jtextfield;/** * @Description: Client * @author HUANGZJB [email protected] * @Company Digital China * @date 2014-6-4 PM 02:18:24 * @version 1.0 */public Class Myclien T extends JFrame implements ActionListener {JTextArea JTA = null; JTextField JTF = null; JButton JB = null; JPanel JP1 = null; JScrollPane jsp = null; PrintWriter pw = null;public static void Main (string[] args) {new myclient ();} Public myclient () {JTA = new JTextArea (); jsp = new JScrollPane (JTA); JTF = new JTextField (10);//Register Carriage return event Jtf.addkeylistener (nEW KeyListener () {@Overridepublic void keytyped (KeyEvent e) {} @Overridepublic void keyreleased (KeyEvent e) {}@ overridepublic void keypressed (KeyEvent e) {if (e.getkeycode () = = Keyevent.vk_enter) {sendMessage ();}}); JB = new JButton ("send"); Jb.addactionlistener (this);//Register a listener event JP1 = new JPanel (); Jp1.add (JTF); Jp1.add (JB); This.add (JSP , borderlayout.center); This.add (JP1, Borderlayout.south); This.settitle ("chat client"); This.setsize (300, 200); This.setvisible (TRUE);//Receive a message sent from the server try {socket s = new socket ("127.0.0.1", 2222); BufferedReader in = new BufferedReader (New InputStreamReader (S.getinputstream ()));p w = new PrintWriter ( S.getoutputstream (), true); while (true) {String info = in.readline (); String str = null;if (jta.gettext () = = NULL | | "". Equals (Jta.gettext ())) {str = "Server:" + info;} else {str = Jta.gettext () + "\r\nserver:" + info;} Jta.settext (str); Jta.setcaretposition (Jta.getdocument (). GetLength ());}} catch (IOException e) {e.printstacktrace ();}} Give the message to the server side @overridepublic void actioNperformed (ActionEvent e) {if (e.getsource () = = JB) {sendMessage ();}} /** * @Description: Send message to server side * @throws */public void SendMessage () {String info = jtf.gettext ();p w.println (info);p W.flush (); Jtf.settext (""); if (jta.gettext () = = NULL | | "". Equals (Jta.gettext ())) {Jta.append ("Client:" + info);} else {jta.append ("\r\nclient:" + info);} Jta.setcaretposition (Jta.getdocument (). GetLength ());//Set scroll bar auto-scroll}}

Java socket for full-duplex communication