java常用类之——java.net.InetAddress

import java.net.InetAddress;

public class demo{

    public static void main(String[] args)throws Exception{

        //以指定主机实例化
        InetAddress Add = InetAddress.getByName("baidu.com");

        //以本地主机实例化
        Add = InetAddress.getLocalHost();

        //以回环地址实例化
        Add = InetAddress.getLoopbackAddress();

        //取主机名
        System.out.println(Add.getHostName());

        //取主机地址
        System.out.println(Add.getHostAddress());

        //返回主机地址的数组形式
        byte[] C_add = Add.getAddress();
        for(int i=0;i<C_add.length;i++){
        System.out.print("["+C_add[i]+"]");
        }

        //localhost
        //127.0.0.1
        //[127][0][0][1]
    }

}