用Java Socket制作广播信使程序 - 编程入门网
作者 佚名技术
来源 NET编程
浏览
发布时间 2012-06-23
| Area output;
protected TextField input;
String yourname;
SketchFrame window;
public ChatClient (String host, int port, SketchFrame window) {
//CONSTRUCTOR INITIALIZING THE ChatClient CLASS
this.host = host; //host AND port WILL BE USED TO OPEN THE
//SOCKET
this.port = port;
this.yourname=JOptionPane.showInputDialog("Enter Login name:");
//TO CREATE AN INPUT DIALOG BOX
window.setSize(100,100); //TO SET THE SIZE OF THE CLIENT
//WINDOW
window.getContentPane().add (output,BorderLayout.CENTER);
//TO ADD TextArea (output) AT THE CENTER OF THE WINDOW
window.getContentPane().add (input,BorderLayout.SOUTH);
//TO ADD THE Textbox (input) AT THE BOTTOM (SOUTH)
protected DataInputStream dataIn;
protected DataOutputStream dataOut;
protected Thread listener;
public synchronized void start () throws IOException {
//THREAD SYNCHRONIZATION METHOD FOR STARTING BROADCAST
if (listener == null) {
Socket socket = new Socket (host, port); //TO INITIALIZE
//THE SOCKET
try {
dataIn = new DataInputStream(new BufferedInputStream (socket.getInputStream ()));
dataOut = new DataOutputStream(new BufferedOutputStream (socket.getOutputStream ()));
dataOut.writeUTF (yourname+" has loggged on\n");
}
catch (IOException ex)
{
socket.close ();
throw ex;
}
}
listener = new Thread (this);
listener.start ();
window.setVisible (true);
}
}
public synchronized void stop () throws IOException
//THREAD SYNCHRONIZATION METHOD FOR STOPPING THE BROADCAST
{
if (listener != null)
{
listener.interrupt ();
listener = null;
dataOut.close ();
}
public void run() { //THREAD METHOD FOR READING A NEW MESSAGE
//LINE FROM THE CLIENT
try {
while (!Thread.interrupted ())
{
String line = dataIn.readUTF ();
output.append (line + "\n");
}
}
catch (IOException ex)
{
handleIOException (ex);
}
}
当用户运行程序并在输入框中输入一些信息，然后回车后，start ( )方法就被调用，并创建了一个socket来初始化输入流和输出流，发送在客户端输入的消息给服务器，服务器再广播这个消息到其他客户端。只要对话建立，那么run ( )将被调用，并发送消息。当用户退出程序时，stop ( )方法被调用，并关闭socket连接。 |
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