在线说明书：http://www.rkgaming.com/zh-CN/article.php?id=51.键盘背部开关状态为 ON2.短按Fn+P ,此时指示灯闪烁三次（但无论切到蓝牙还是有线都是闪烁三次，因此看步骤3）。3.选择Fn+Q/W/E其中一组进行配对(比如按下Fn+Q)，此时键盘指示灯闪烁三次。(若无反应，表示未正确进入蓝牙模式，请重复步骤2，因此这里步骤3可以看出步骤2是否成功切换到蓝牙)。4.长按 Fn+P 3秒进，此时P键持续闪烁，表示已进入配对模式5.打开设备蓝牙并搜索连接名为“RK Bluebooth Keyboard“6.连接成功后，P键自动停止闪烁。以此类推，重复以上步骤，Fn+Q/W/E 可同时设置并存储三组不同的蓝牙设备，并且可在不同设备之间任意切换。

Java获取本机ip地址/ipv6地址，非用户请求返回的IP try { String hostAddress = InetAddress.getLocalHost().getHostAddress(); System.out.println("hostAddress:" + hostAddress); String hostName = InetAddress.getLocalHost().getHostName(); System.out.println("hostName:" + hostName); if (hostName.length() > 0) { InetAddress[] addrs = InetAddress.getAllByName(hostName); if (addrs.length > 0) { for (int i = 0; i < addrs.length; i++) { InetAddress address = addrs[i]; System.out.println("**********************"); System.out.println(address.getHostAddress()); if (address instanceof Inet6Address) { System.out.println("true6"); } else if(address instanceof Inet4Address){ System.out.println("true4"); } else { System.out.println("unknown"); } System.out.println("**********************"); } } } } catch (UnknownHostException e) { e.printStackTrace(); }或者 Enumeration<NetworkInterface> interfs = NetworkInterface.getNetworkInterfaces(); while (interfs.hasMoreElements()) { NetworkInterface interf = interfs.nextElement(); Enumeration<InetAddress> addres = interf.getInetAddresses(); while (addres.hasMoreElements()) { InetAddress in = addres.nextElement(); if (in instanceof Inet4Address) { System.out.println("v4:" + in.getHostAddress()); } else if (in instanceof Inet6Address) { System.out.println("v6:" + in.getHostAddress()); } } }参考：https://blog.csdn.net/scugxl/article/details/47816117