public void recmsg()
{
try
{
String msg = dis.readUTF();
String oldText = txt_recMsgClient.getText();
StringBuilder yourStringBuilder = new StringBuilder();
yourStringBuilder.append("\n").append(oldText).append(msg);
txt_recMsgClient.setText(yourStringBuilder.toString());
txt_recMsgClient.repaint();
}
catch (IOException ex)
{
Logger.getLogger(ClientForm.class.getName()).log(Level.SEVERE, null, ex);
}
}