📅 最后修改于: 2020-09-28 03:12:17 🧑 作者: Mango
Java InetAddress类表示IP地址。 java.net.InetAddress类提供了获取任何主机名IP的方法，例如www.javatpoint.com，www.google.com，www.facebook.com等。
IP地址由32位或128位无符号数字表示。 InetAddress的实例代表IP地址及其相应的主机名。地址类型有两种：单播和多播。单播是单个接口的标识符，而组播是一组接口的标识符。
此外，InetAddress具有缓存机制，用于存储成功和失败的主机名解析。
| Method | Description |
|---|---|
| public static InetAddress getByName(String host) throws UnknownHostException | it returns the instance of InetAddress containing LocalHost IP and name. |
| public static InetAddress getLocalHost() throws UnknownHostException | it returns the instance of InetAdddress containing local host name and address. |
| public String getHostName() | it returns the host name of the IP address. |
| public String getHostAddress() | it returns the IP address in string format. |
让我们看一个简单的InetAddress类示例，以获取www.javatpoint.com网站的IP地址。
import java.io.*;
import java.net.*;
public class InetDemo{
public static void main(String[] args){
try{
InetAddress ip=InetAddress.getByName("www.javatpoint.com");
System.out.println("Host Name: "+ip.getHostName());
System.out.println("IP Address: "+ip.getHostAddress());
}catch(Exception e){System.out.println(e);}
}
}
输出：
Host Name: www.javatpoint.com
IP Address: 206.51.231.148