#Socket --- ###使用TCP --- 客戶端 ``` Socket socket = new Socket("ip", 端口); InputStream is = socket.getInputStream(); DataInputStream dis = new DataInputStream(is); OutputStream os = socket.getOutputStream(); DataInputStream dos = new DataOutputStream(os); ``` 服務器端 ``` ServerSocket serverSocket = new ServerSocket(端口); Socket socket = serverSocket.accept(); //獲取流的方式與客戶端一樣 ``` 讀取輸入流 ``` byte[] buffer = new byte[1024]; do{ int count = is.read(buffer); if(count <= 0){ break; } else{ // 對buffer保存或者做些其他操作 } } while(true); ``` 使用UDP --- 客戶端和服務器端一樣的 ``` DatagramSocket socket = new DatagramSocket(端口); InetAddress serverAddress = InetAddress.getbyName("ip"); //發送 DatagramPackage packet = new DatagramPacket(buffer, length, host, port); socket.send(packet); //接收 byte[] buf = new byte[1024]; DatagramPacket packet = new DatagramPacket(buf, 1024); Socket.receive(packet); ```