server ``` //1.創建ServerSocket對象,綁定端口，開始等待連接 ServerSocket ss = new ServerSocket(8888); //2.接收連接accept方法，返回socket對象 Socket socket = ss.accept(); //3.通過socket獲取輸入流 InputStream is = socket.getInputStream(); byte[] b = new byte[1024]; int len = is.read(b); String msg = new String(b, 0, len); //3.回復 OutputStream out = socket.getOutputStream(); out.write("你好".getBytes()); out.close(); is.close(); socket.close(); ss.close(); ``` client ``` Socket client = new Socket("localhost", 8888); OutputStream outputStream = client.getOutputStream(); outputStream.write("你好 服務器".getBytes()); outputStream.close(); InputStream inputStream = client.getInputStream(); byte[] b = new byte[1024]; inputStream.read(b); System.out.println(new String(b)); client.close(); ```