Вот кусочки кода , если есть вопросы , пожалуйста 
Не даю весь код потому как ето 900 строк , чат всего лишь маленькое добавление к программе
| Код |
result = new JTextArea(3, 50);
result.setCaretPosition(result.getDocument().getLength());
result.setEditable(false);
result.setAlignmentX(Component.LEFT_ALIGNMENT);
result.setBackground(Color.lightGray);
result.setForeground(new Color(0, 0, 204));
result.setBorder(new TitledBorder(new EtchedBorder(),
"Dialog"));
JScrollPane scrollPane = new JScrollPane(result,
ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED); // 0,6
AreaView = new JViewport();
AreaView.setView(result);
scrollPane.setViewport(AreaView);
//...
//---------------------------
connect = new JButton("Send");
connect.setMnemonic('S');
connect.addActionListener(this);
//...
//------------------------------------
inputArea = new JTextArea(3, 50);
inputArea.setAlignmentX(Component.LEFT_ALIGNMENT);
inputArea.setBackground(Color.lightGray);
inputArea.setForeground(new Color(204,0,0));
inputArea.setBorder(new TitledBorder(new EtchedBorder(),
"Enter your message"));
scrollPane = new JScrollPane(inputArea,
ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED); // 0,7
//...
//---------------------------------
public class BroadcastHandler extends Thread
{
BufferedReader broadcastReader;
public BroadcastHandler()
{
try {
broadcastReader = new BufferedReader(
new InputStreamReader(server.getInputStream()));
}
catch (IOException e){;}//scrollPanel();
}
public void run()
{
String line;
try{
while ((line=broadcastReader.readLine())!= null)
{
result.append(line+"\n");
}
}
catch (IOException e) {;}//scrollPanel();
}
}
//----------------------------
public void ChatFrame(String host)
{
try
{
server = new Socket(host,5454);
pw = new PrintWriter(server.getOutputStream(), true);
}
catch(IOException e)
{
System.out.println("problem connecting to server");
}
}
//----------------------------
public void actionPerformed(ActionEvent evt)
{
pw.println(inputArea.getText());
inputArea.setText("");
scrollPanel();
}
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