Chương trình Chat đơn giản sử dụng giao thức TCP

private JLabel jLabel2 = null; private JTextField textHost = null; private JTextField textName = null; private JTextArea textChat = null; private JTextArea textSend = null; private [r]

Chương trình Chat đơn giản sử dụng giao thức TCP

Tool Eclipse

ThreadChat.java:

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.ServerSocket;

import java.net.Socket;

public class ThreadChat implements Runnable{

private Socket socket = null;

public TCPChat chat = null;

ServerSocket server = null;

BufferedReader br = null;

public ThreadChat(){

try{

nhận port 9999 làm tham số

}catch(Exception e){

e.printStackTrace();

}

new Thread(this).start();//khởi động Thread }

public void run(){

try{

while(true){

while((socket = server.accept())!= null){

//nhận kết nối từ máy khác đến

br = new BufferedReader(new InputStreamReader(socket.getInputStream()));

String st = br.readLine();

} }

}catch(Exception ex){

}finally{

try{

socket.close();

}catch(IOException ex2){}

} }

}

TCPChat.java:

import java.awt.Color;

import java.awt.Frame;

import javax.swing.JLabel;

import java.awt.Rectangle;

import javax.swing.JTextField;

import javax.swing.JTextArea;

import javax.swing.JButton;

import java.io.PrintWriter;

import java.net.Socket;

public class TCPChat extends Frame {

private static final long serialVersionUID = 1L;

private JLabel jLabel1 = null;

private JLabel jLabel2 = null;

private JTextField textHost = null;

private JTextField textName = null;

private JTextArea textChat = null;

private JTextArea textSend = null;

private JButton ButtonSend = null;

private Socket socket = null;

private PrintWriter out = null;

private JTextField getTextHost() {

if (textHost == null) {

textHost = new JTextField();

textHost.setBounds(new Rectangle(150, 45, 301, 31));

}

return textHost;

}

private JTextField getTextName() {

if (textName == null) {

textName = new JTextField();

textName.setBounds(new Rectangle(150, 90, 301, 31));

}

return textName;

}

private JTextArea getTextChat() {

if (textChat == null) {

textChat = new JTextArea();

textChat.setBounds(new Rectangle(31, 137, 418, 121));

textChat.setAutoscrolls(true);

}

return textChat;

}

private JTextArea getTextSend() {

if (textSend == null) {

textSend = new JTextArea();

textSend.setBounds(new Rectangle(30, 277, 298, 61));

}

return textSend;

}

private JButton getButtonSend() {

if (ButtonSend == null) {

ButtonSend = new JButton();

ButtonSend.setBounds(new Rectangle(358, 276, 93, 61)); ButtonSend.setText("Send");

ButtonSend.addActionListener(new

java.awt.event.ActionListener() {

public void actionPerformed

(java.awt.event.ActionEvent e) {

String str = textSend.getText();

String name = textName.getText();

String host = textHost.getText();

try{

//Socket nhận tham số là địa chỉ Host và port

socket = new Socket(host, 9999);

out = new PrintWriter (socket.getOutputStream(),true);

out.println(name +": "+ str +"\n");//truyền chuỗi lên server để xử lý

textChat.append(name+": "+ str +"\n"); textSend.setText("");

textSend.requestFocus();

socket.close();

}catch(Exception ex){

try{

if(socket !=null)

socket.close();

}catch(Exception ex2){

ex2.printStackTrace();

} ex.printStackTrace();

} }

});

}

return ButtonSend;

}

public static void main(String[] args) {

}

public TCPChat() {

super();

initialize();

textHost.requestFocus();

ThreadChat obj = new ThreadChat();

obj.chat = this;

}

private void initialize() {

jLabel1 = new JLabel();

jLabel1.setBounds(new Rectangle(30, 45, 105, 30)); jLabel1.setText("IP Adress");

jLabel2 = new JLabel();

jLabel2.setBounds(new Rectangle(30, 90, 105, 31)); jLabel2.setText("User name");

this.setLayout(null);

this.setSize(483, 366);

this.setTitle("TCP Chat");

this.setBackground(Color.lightGray);

this.add(jLabel1, null);

this.add(jLabel2, null);

this.add(getTextHost(), null);

this.add(getTextName(), null);

this.add(getTextChat(), null);

this.add(getTextSend(), null);

this.add(getButtonSend(), null);

}

public void show(String str){

textChat.append(str);

}

} // @jve:decl-index=0:visual-constraint="10,10"

Kết quả có dạng: