It 18 Palm Job _java Foundation 16th Day _gui/socket

Refer to the video and write a chat program.

Knowledge Point Analysis:

Socket + GUI + IO = Simplified version of QQ

------------------------------

1.GUI

2.Socket

Serversocket:port + Accept

Socket sock = accept ();

Update window

Receiving data from the client

New Thread () {

Run () {

Sock. getInputStream ();

....

Update window

}

}.start ()

3. Complete the ServerSocket push message to all clients in a sub-thread.

List<outputstream> ... =;

4. Push the contact list to all clients.

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Package Com.it18zhang.QQDemo;

public class App {

public static void Main (string[] args) {

Create window

Mywindow w = new Mywindow ();

Messaging server

Messageserver Server = new Messageserver (w);

Start the messaging server

Server.start (1234);

}

}

Package Com.it18zhang.QQDemo;

Import Java.io.BufferedReader;

Import Java.io.BufferedWriter;

Import Java.io.InputStreamReader;

Import Java.io.OutputStreamWriter;

Import Java.net.Socket;

public class Clientdemo {

public static void Main (string[] args) throws Exception {

Socket s = new socket ("localhost", 1234);

BufferedWriter bw = new BufferedWriter (New OutputStreamWriter (S.getoutputstream (), "GBK"));

Bw.write ("TCP hello!");

S.close ();

}

}

Package Com.it18zhang.QQDemo;

Import Java.awt.event.WindowAdapter;

Import java.awt.event.WindowEvent;

Import java.util.ArrayList;

Import Java.util.HashSet;

Import java.util.List;

Import Java.util.Set;

Import Javax.swing.JButton;

Import Javax.swing.JFrame;

Import javax.swing.JList;

Import javax.swing.JTable;

Import Javax.swing.JTextArea;

Import Javax.swing.table.AbstractTableModel;

Import Javax.swing.table.TableModel;

public class Mywindow extends JFrame {

Private static final long serialversionuid = 6142786986925220872L;

Historical records

Private JTextArea tahistory;

Send content

Private JTextArea tacontent;

Send button

Private JButton btnsend;

Contact List

Private JList listcontacts;

Private JTable table;

Initialize the form

Public Mywindow () {

INI ();

}

Initialize action

private void Ini () {

Set the boundary size, position

This.setsize (600, 400);

This.setlocation (200, 200);

Set to Absolute layout

This.setlayout (NULL);

Set up a Contact table

Table = new JTable ();

Table.setbounds (500, 0, 100, 400);

This.add (table);

Set the chat history area

Tahistory = new JTextArea ();

Tahistory.seteditable (FALSE);

Tahistory.setbounds (0, 0, 480, 300);

This.add (tahistory);

This.setvisible (TRUE);

Adding Listener Events

This.addwindowlistener (New Windowadapter () {

public void windowclosed (WindowEvent e) {

System.exit (-1);

}

});

}

/**

* Refresh Contacts

*/

public void Refreshcontacts (final list<string> clients) {

set<string> set = new hashset<string> (clients);

Final list<string> newclients = new arraylist<string> (set);

TableModel Datamodel = new Abstracttablemodel () {

Public Object getvalueat (int row, int col) {

return Newclients.get (Row);

}

public int GetRowCount () {

return Newclients.size ();

}

public int getColumnCount () {

return 1;

}

};

Table.setmodel (Datamodel);

}

/**

* Update Chat History

*/

public void Updatehistory (string addr, string line) {

Original

String old = Tahistory.gettext ();

StringBuilder builder = new StringBuilder ();

Builder.append (old);

Builder.append ("\ r \ n");

Builder.append (addr);

Builder.append ("\ r \ n");

Builder.append (line);

Builder.append ("\ r \ n");

Update Chat Area

Tahistory.settext (Builder.tostring ());

}

}

Package Com.it18zhang.QQDemo;

Import java.net.InetAddress;

Import Java.net.ServerSocket;

Import Java.net.Socket;

Import java.util.ArrayList;

Import java.util.List;

/**

* Message Server

*/

public class Messageserver {

Defines a collection of clients,

Private list<string> clients = new arraylist<string> ();

Private Mywindow window;

Public messageserver (Mywindow window) {

This.window = window;

}

Start the server

public void start (int port) {

try {

ServerSocket ss = new ServerSocket (port);

SYSTEM.OUT.PRINTLN ("Server started up");

InetAddress remaddr;

int remport;

while (true) {

Final Socket sock = Ss.accept ();

System.out.println (socketutil.getaddr (sock) + ": Connected");

New Messagereceiverthread (Window,sock). Start ();

REMADDR = Sock.getinetaddress ();

Remport = Sock.getport ();

Adding Client Objects

Clients.add (socketutil.getaddr (sock));

Refresh List

Window.refreshcontacts (clients);

}

} catch (Exception e) {

E.printstacktrace ();

}

}

}

Package Com.it18zhang.QQDemo;

Import Java.io.BufferedReader;

Import Java.io.InputStreamReader;

Import Java.net.Socket;

/**

* Message Receive Thread

*/

public class Messagereceiverthread extends Thread {

Private Mywindow window;

Private Socket sock;

Public messagereceiverthread (Mywindow window, Socket sock) {

This.window = window;

This.sock = sock;

}

public void Run () {

while (true) {

try {

BufferedReader br = new BufferedReader (New InputStreamReader (Sock.getinputstream (), "GBK"));

String line = null;

while (line = Br.readline ()) = null) {

Window.updatehistory (socketutil.getaddr (sock), line); //Update History list

}

} catch (Exception e) {

E.printstacktrace ();

}

}

}

}

Package Com.it18zhang.QQDemo;

Import Java.net.Socket;

public class Socketutil {

/**

* Return address string

*/

public static String Getaddr (Socket sock) {

String IP = sock.getinetaddress (). gethostaddress ();

String ip0 = ip.substring (Ip.lastindexof (".") +1);

Return ip0+ ":" +sock.getport ();

}

}

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It 18 Palm Job _java Foundation 16th Day _gui/socket