本代碼是用來獲取所使用的電腦的 IP地址 和使用者的

    public class Main {
    public static void main(String[] args)
        throws Exception {
    InetAddress addr = InetAddress.getLocalHost();
    System.out.println("Local HostAddress: "+addr.getHostAddress());
            String hostname = addr.getHostName();
    System.out.println("Local host name: "+hostname);
     }
   }