给这个代码加点注释

//点击发送后传输数据

b2.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

if(connected) {

String s = tf3.getText().trim();

tf3.setText("  ");

ta.setText(ta.getText() + "客户端说：" + s + '\n'+getCurrentTime()+'\n');

try {

dos.writeUTF(s);

dos.flush();

} catch (IOException e1) {

e1.printStackTrace();

}

} else {

ta.setText(ta.getText() +"未连接,发送失败\n");

}

}

});