Java ip与掩码做与运算 java获得ip地址

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Arrays;

//获取Ip地址

public class GetIP {

    public static void main(String[] args) {
        try {

            //获取程序所在主机的主机名以及Ip地址
            InetAddress address =InetAddress.getLocalHost(); 
            System.out.println("主机:"+address);
            System.out.println("主机名："+address.getHostName()+"\n"+"IP:"+address.getHostAddress());

            //获取本机回路地址
            address=InetAddress.getByName(null);
            System.out.println("主机:"+address);
            System.out.println("主机名："+address.getHostName()+"\n"+"IP:"+address.getHostAddress());

            //获取新浪web主机Ip地址
            InetAddress[] address1=InetAddress.getAllByName("www.sina.com.cn");  //防止多个Ip地址
            System.out.println("新浪Ip："+Arrays.toString(address1));


        } catch (UnknownHostException e) {

            e.printStackTrace();
        }



    }

}