Java自学-网络编程(1)
1、网课截图
1.1 什么是计算机网络
1.2 网络通信的两个要素
1.3 IP地址
package lesson01;
import java.net.InetAddress;
import java.net.UnknownHostException;
/**
* Author: Gu Jiakai
* Date: 2021/7/31 17:05
* FileName: TestInetAddress
* Description:
*/
//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());//规范的名字。
System.out.println(inetAddress2.getHostAddress());//ip
System.out.println(inetAddress2.getHostName());//域名,或者本机电脑的名字。
} catch (UnknownHostException e) {
e.printStackTrace();
}
}
}
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