UDP protocol-based chat room (Java implementation)

The main idea is simple:

1. Set up your own receive Port

2. Set the other IP and port

3. Sending data and receiving data

Here's the main code:

Import java.net.*;import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.io.*;p ublic class    Qqframe extends JFrame implements runnable{private JTextArea Sendarea = new JTextArea (20,20);    Private JTextArea Showarea = new JTextArea (10,20);    Private JButton Sendbutton = new JButton ("send");    Private MenuBar MenuBar = new MenuBar ();    Private Menu SetMenu = new Menu ("Settings");    Private Menu Helpmenu = new Menu ("Help");        Private MenuItem Aboutitem = new MenuItem ("about");    Private MenuItem SetItem = new MenuItem ("Configuration Parameters");    Private thread thread = new thread (this);    Private config config = new config ();    Private JDialog Dialog = new JDialog (this, "parameter configuration", true);    private int myport;        Qqframe (int in_myport) {super ("LAN chat Tool");        Setresizable (FALSE);        MyPort = In_myport;        Setitem.addactionlistener (New Setdialog (Dialog,this));        Aboutitem.addactionlistener (New Aboutdialog (this));        Initlayout (); Sendbutton.addactionlIstener (New Sendlistener (This,sendarea,showarea,config));        Thread.Start ();                Addwindowlistener (New Windowadapter () {public void windowclosing (WindowEvent e) {            System.exit (0);    }        });        } void Initlayout () {int w,h;        W = 400;        h = 500;        SetBounds (100,100,W,H);        SetVisible (TRUE);        SetLayout (New GridLayout (3,1,10,15));        JPanel JP1,JP2;        JP1 = new JPanel ();        JP2 = new JPanel ();        JLabel jl1;        JL1 = new JLabel ("Chat record Box:");        Jp1.setlayout (NULL);        Jp1.add (JL1);        Jl1.setbounds (0,0,w,20);        Jp1.add (Showarea);        Showarea.setbounds (0,30,w,h/3-20);        JLabel Jl2;        Jp2.setlayout (NULL);        JL2 = new JLabel ("Send box:");        Jp2.add (JL2);        Jl2.setbounds (0,0,w,20);        Sendarea.setbounds (0,30,w,h/3-20);        Jp2.add (Sendarea);        JPanel jp3 = new JPanel ();        Add (JP1);        Add (JP2); Add (JP3);        Jp3.add (Sendbutton);        Setmenubar (MenuBar);        Menubar.add (SetMenu);        Menubar.add (Helpmenu);        Helpmenu.add (Aboutitem);        Setmenu.add (SetItem);        Dialog.setbounds (120,150,200,250);        JLabel Iplabel = new JLabel ("Opposing IP");        JLabel Yourportlabel = new JLabel ("receiver Port");        JLabel Namelabel = new JLabel ("native name");        JTextField Iptextfield = new JTextField (15);        JTextField Yourporttextfield = new JTextField (8);        JTextField Nametextfield = new JTextField (15);        Iptextfield.settext ("127.0.0.1");        Yourporttextfield.settext ("879");                Nametextfield.settext ("Hanxi");        Dialog.setlayout (New GridLayout (4,2,10,10));        Dialog.add (Iplabel);        Dialog.add (Iptextfield);        Dialog.add (Yourportlabel);        Dialog.add (Yourporttextfield);        Dialog.add (Namelabel);        Dialog.add (Nametextfield);        Dialog.add (New Panel ());        JButton Surebutton = new JButton ("OK"); Dialog.add (SurEbutton);    Surebutton.addactionlistener (New Surelistener (Iptextfield,yourporttextfield,nametextfield,dialog,config));        public void Run () {datagrampacket DP = NULL;        Datagramsocket ds = null;        byte[] buf = new byte[1024];            try {dp = new Datagrampacket (buf,buf.length);            ds = new Datagramsocket (myport);        System.out.println ("myport=" +myport); } catch (Exception e) {} while (true) {try {ds.receive (                DP);                int length = Dp.getlength ();                InetAddress address = dp.getaddress ();                int port = Dp.getport ();                String message = new String (Dp.getdata (), 0,length);                Showarea.append ("Received data length:" +length+ "\ n");                Showarea.append ("Received data from:" +address+ "Port:" +port+ "\ n");            Showarea.append ("Received data is:" +message+ "\ n");      } catch (Exception e) {      }}}}//send event class Sendlistener implements actionlistener{private JFrame qqframe;    Private JTextArea Sendarea;    Private JTextArea Showarea;    Private config config; Sendlistener (JFrame in_qqframe, JTextArea In_sendarea, JTextArea In_showarea, Config in_config) {qqframe = In_Q        Qframe;        Sendarea = In_sendarea;        Showarea =in_showarea;        config = in_config;        System.out.println ("In_port:" +config.getyourport ());    Qqframe.validate ();        } public void actionperformed (ActionEvent e) {System.out.println ("You clicked the Send button");        byte[] buf = Sendarea.gettext (). Trim (). GetBytes ();            try {inetaddress address = Inetaddress.getbyname (Config.getip ());            Datagrampacket DP = new Datagrampacket (Buf,buf.length,address,integer.parseint (Config.getyourport ()));            Datagramsocket ds = new Datagramsocket ();            Showarea.append ("Packet Destination Address:" +dp.getaddress () + "\ n"); Showarea.apPend ("Packet Destination port number:" +dp.getport () + "\ n");            Showarea.append ("Packet Length:" +dp.getlength () + "\ n");        Ds.send (DP);    } catch (Exception ee) {}}}//configuration settings class Setdialog implements actionlistener{Private JDialog dialog;    Private JFrame frame;        Setdialog (JDialog in_dialog,jframe Parent) {dialog = In_dialog;    frame = parent;        } public void actionperformed (ActionEvent e) {dialog.validate ();        int x = Frame.getx ();        int y = frame.gety ();        Dialog.setbounds (x+50,y+50,200,250);    Dialog.setvisible (TRUE);    }}//About dialog box class Aboutdialog extends JDialog implements actionlistener{private JFrame frame;    Private JLabel JL = new JLabel ("Thank you for your use, Han XI");        Aboutdialog (JFrame parent) {frame = parent;    Add (JL);        } public void actionperformed (ActionEvent e) {validate ();        int x = Frame.getx ();        int y = frame.gety ();        SetBounds (x+50,y+50,200,250);    SetVisible (TRUE);}}//dialog box OK button event class Surelistener implements actionlistener{JTextField Iptextfield;    JTextField Yourporttextfield;    JTextField Nametextfield;    Private Dialog Dialog;        Private config config; Surelistener (JTextField in_iptextfield,jtextfield in_yourporttextfield,jtextfield in_nameTextField,JDialog in_        Dialog,config in_config) {Iptextfield = In_iptextfield;        Yourporttextfield = In_yourporttextfield;        Nametextfield = In_nametextfield;        dialog = In_dialog;    config = in_config; } public void actionperformed (ActionEvent e) {config.set (Iptextfield.gettext (), Yourporttextfield.gettext (), n        Ametextfield.gettext ());        System.out.println ("Config:yourport:" +config.getyourport ());    Dialog.setvisible (FALSE);    }}//parameter class config{private String ip= "127.0.0.1";    Private String yourport= "666";    Private String name= "Hanxi";      public void Set (String in_ip, String in_yourport,string in_name) {IP = in_ip;  Yourport = In_yourport;    name = In_name;    } public String GetIP () {return IP;    } public String Getyourport () {return yourport;    } public String GetName () {return name; }}

Here is the Main method code:

public class qq{public    static void Main (String args[])    {        if (args.length = = 0)        {            System.out.println ("Please enter the port number to receive the data after QQ (need space)!" ");            System.exit (0);        }        System.out.println (Integer.parseint (args[0));        Qqframe frame = new Qqframe (Integer.parseint (args[0]));}    }

Set up a picture of ports and IP

Here is the chat interface

UDP protocol-based chat room (Java implementation)