java - InetAddress.getLocalHost().getHostAddress()的返回值问题？

Question

import java.net.Inet4Address;
import java.net.InetAddress;
import java.net.UnknownHostException;

public class Demo {

    public static void main(String[] args) {
        InetAddress address = null;
        try {
            address = InetAddress.getLocalHost();
        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        /**
         * 169.254.86.58

         */
        System.out.println(address.getHostAddress());
    }

}

上面的代码输出169.254.86.58 ，而我机器的IP地址是59开头的。
我的笔记本使用网线连上的网络， 然后开启了WiFi共享的功能，然后运行上面的代码结果输出的是169.254.86.58,如果我关闭了WiFi共享功能， 那么上面的代码就能够输出59开头的IP地址。
这是为什么呢？

Answer 1

• Addresses in the range 169.254.xxx.xxx are link local IP addresses. These are reserved for use on a single network segment.
  After turning on the WiFi sharing function, a new LAN will be opened