主要用到Socket類。new一個Socket類指定連線的伺服器和埠號

void sock1(){
        System.out.println("客戶端");
        try {
            Socket socket=new Socket("localhost",8800);
            InputStream is=socket.getInputStream();
            OutputStream os=socket.getOutputStream();
            String str="說句假話，我好愛你呀。"
 
;//中文一般用位元組流，方便修改編碼方式
            os.write(str.getBytes());
            socket.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

伺服器需要new一個serverSocket指定埠號
呼叫serverSocket.accept()生成Socket物件

void run17() {
        System.out.println("伺服器");
        try {
            ServerSocket serverSocket = new
 
 ServerSocket(8800);
            Socket accept = serverSocket.accept();
            InputStream is = accept.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));//緩衝區存接受到的位元組碼
            int n;
            String str = "";
            while ((str = br.readLine()) != null
 
) {//逐行讀取
                System.out.println(str);
            }

            serverSocket.close();
            accept.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }