关于udp的接收数据问题

[lEFTmOON]

void jButton2_actionPerformed(ActionEvent e) {
try {
DatagramSocket socket = new DatagramSocket();
byte[] buf = new byte[256];
InetAddress address = InetAddress.getByName("www.live-av.com");
DatagramPacket packet = new DatagramPacket(buf, buf.length, address, 1800);
socket.send(packet);
packet = new DatagramPacket(buf, buf.length);
socket.receive(packet);
String received = new String(packet.getData(), 0);
jTextArea1.append(received + "\n");
socket.close();
}
catch (IOException ex) {
ex.printStackTrace();
}
}

以上是我的代码，界面上比较简单，一个jTextArea1，用来接收传入的数据的，可是问题在于，如果客户端不传入数据进来，我点此按钮后将会使程序阻塞，怎么办？