IP地址
作者:互联网
IP
ip地址:InetAddress
- 唯一定位一台网络上计算机
- 127.0.0.1:本机localhost
- ip地址的分类
- ipV4 / ipV6
- IPV4 127.0.0.1,4个字节组成,0-255,42亿~;30亿都在北美,亚洲4亿。2011年就用尽;
- IPV6 128位,8个无符号整数!
2001:0bb2:aaaa:0015:0000:0000:1aaa:1312
- 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的
- ipV4 / ipV6
- 域名:记忆IP问题!
- IP:www.jd.com
package com.wang.netStudy;
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 inetAddress1 = InetAddress.getByName("127.0.0.1");
System.out.println(inetAddress1);
InetAddress inetAddress3 = InetAddress.getByName("localhost");
System.out.println(inetAddress3);
InetAddress inetAddress4 = InetAddress.getLocalHost();
System.out.println(inetAddress4);
//查询网站ip地址
InetAddress inetAddress2 = InetAddress.getByName("www.baidu.com");
System.out.println(inetAddress2);
//常用方法
//System.out.println(inetAddress2.getAddress());
System.out.println(inetAddress2.getCanonicalHostName());//规范的
System.out.println(inetAddress2.getHostAddress());//ip
System.out.println(inetAddress2.getHostName());//域名,或者自己电脑的名称
} catch (UnknownHostException e) {
e.printStackTrace();
}
}
}
标签:inetAddress2,IP,System,IP地址,println,InetAddress,out 来源: https://www.cnblogs.com/wshjyyysys/p/15860193.html