源代码：
package com.bjsxt.TcpIp;
import java.net.InetAddress;
import java.net.UnknownHostException;
public class InetDemo02 {
public static void main(String[] args) throws UnknownHostException {
InetAddress inetAddress1 = InetAddress.getByName("www.baidu.com");
byte[] bytes1 = inetAddress1.getAddress();
System.out.print("inetAddress1.getAddress(): ");
for (byte b : bytes1) {
System.out.print(b + ",");
}
System.out.println();
System.out.println("inetAddress1.getHostAddress(): " + inetAddress1.getHostAddress());
System.out.println("inetAddress1.getHostName(): " + inetAddress1.getHostName());
System.out.println("=====================================");
InetAddress inetAddress2 = InetAddress.getByAddress(bytes1);
System.out.println("inetAddress2.getHostAddress(): " + inetAddress2.getHostAddress());
System.out.println("inetAddress2.getHostName(): " + inetAddress2.getHostName());
System.out.println("=====================================");
}
}运行结果：
inetAddress1.getAddress(): -73,-24,-25,-82, inetAddress1.getHostAddress(): 183.232.231.174 inetAddress1.getHostName(): www.baidu.com ===================================== inetAddress2.getHostAddress(): 183.232.231.174 inetAddress2.getHostName(): 183.232.231.174 =====================================
疑问：
为什么 inetAddress2.getHostName() 获取的不是“www.baidu.com”呢？
inetAddress2是通过 getByAddress 获取的，用的就是 inetAddress1 的 getAddress 的返回值，我以为应该指向是相同的，实际运行获取的 getHostAddress() 相同，但是获取的 getHostName() 不同。
通过getByAddress()， 要填入什么参数，才能有 getHostName() 来获得 "www.baidu.com"呢？
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