IP地址
IP地址:InetAddress(没有构造器,通过静态方法返回) java.net包下
-
唯一定位一台网络上的计算机
-
127.0.0.1:本机localhost
-
ip地址的分类
- IPV4/IPV6
- IPV4:192.168.194.1 32位
- IPV6: 2409:8a55:227a:83c0:d028:ff84:6d2c:dee8 128位
- 公网(互联网)/私网(局域网)
- ABCD类地址
- 192.168.xx.xx专门给组织内部使用
- IPV4/IPV6
-
域名:
-
ping ip/域名
-
ipconfig
-
测试InetAddress:
package net.study;
import java.net.InetAddress;
import java.net.UnknownHostException;
// 测试IP
public class TestInetAddress {
public static void main(String[] args) {
try {
// 查询本机地址
InetAddress inetAddress = InetAddress.getByName("127.0.0.1");
System.out.println(inetAddress);
InetAddress inetAddress2 = InetAddress.getByName("localhost");
System.out.println(inetAddress2);
InetAddress inetAddress3 = InetAddress.getLocalHost();
System.out.println(inetAddress3);
// 查询网站ip地址
InetAddress inetAddress4 = InetAddress.getByName("www.vip.com");
System.out.println(inetAddress4);
// 常用方法
System.out.println(inetAddress.getAddress());
System.out.println(inetAddress.getCanonicalHostName()); // 规范的名字
System.out.println(inetAddress.getHostAddress()); // ip
System.out.println(inetAddress.getHostName()); // 域名,或者自己电脑的名字
} catch (UnknownHostException e) {
e.printStackTrace();
}
}
}