1. // 1、获取本机地址对象
    2. InetAddress localHost = InetAddress.getLocalHost();
    3. System.out.println("本机ip地址 = " + localHost.getHostAddress());
    4. System.out.println("主机名 = " + localHost.getHostName());
    6. // 2、获取域名ip对象
    7. InetAddress ip2 = InetAddress.getByName("www.baidu.com");
    8. System.out.println("域名的ip地址 = " + ip2.getHostAddress());
    9. System.out.println("域名的主机名 = " + ip2.getHostName());
    11. // 3、获取公网ip对象
    12. InetAddress ip3 = InetAddress.getByName("180.101.49.12");
    13. System.out.println("域名的ip地址 = " + ip3.getHostAddress());
    14. System.out.println("域名的主机名 = " + ip3.getHostName());
    16. // 4、判断是否能通：ping 5s测试是否可通
    17. System.out.println("ping 5s = " + ip3.isReachable(5000));