网络通信学习笔记(二)---IP地址,端口

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

public class TestInetAddress {
    public static void main(String[] args) throws UnknownHostException {
//      查询本机地址
        InetAddress inetAddress1= InetAddress.getByName("127.0.0.1");
        System.out.println(inetAddress1);
        InetAddress inetAddress2= InetAddress.getByName("localhost");
        System.out.println(inetAddress2);
        InetAddress inetAddress3= InetAddress.getLocalHost();
        System.out.println(inetAddress3);
        //查询网站地址
        InetAddress inetAddress4= InetAddress.getByName("www.baidu.com");
        System.out.println(inetAddress4);

//        常用方法
        System.out.println(inetAddress4.getAddress());//该对象的原始IP地址
        System.out.println(inetAddress4.getCanonicalHostName());//获取此IP地址的标准域名
        System.out.println(inetAddress4.getHostAddress());//以文本形式返回IP地址字符串
        System.out.println(inetAddress4.getHostName());//获取此IP地址的主机名
    }
}