JAVA透过SOCKET接收发送数据

JAVA通过SOCKET接收发送数据
JAVA用SOCKET通信发送数据。：：：

public void test() throws UnknownHostException, IOException {    Socket client = new Socket("172.1.1.1",8808);      PrintWriter pw = new PrintWriter(client.getOutputStream());      pw.println(this.formatStr());    pw.close();      client.close();}