Problem Statement?
- Get IPAddress & Hostname, Canonical name for localhost.
- InetAddress class provides APIs to retrieve network details for localhost.
- We have already discussed in our article to fetch network details for public hosts like facebook or youtube etc.
Methods of InetAddress class to get network details
| Method Name |
Description |
|---|
| String getCanonicalHostName() |
Gets the fully qualified domain name for this IP address. |
| String getHostAddress() |
Returns the IP address string in textual presentation. |
| String getHostName() |
Gets the host name for this IP address |
Examples: Get IPAddress, hostname & canonical name in java
Example: get host details for localhost
InetAddress localHost = InetAddress.getLocalHost()
Output: Program should return host like
HostName is :<my dummy hostname>
Canonical hostname is: <my fully qualified hostname>
IPAddress is :<IP address of localhost>
Program: Network info hostname, IP Address & Canonical name in java
package org.learn.network;
import java.net.InetAddress;
import java.net.UnknownHostException;
public class HostNameAndIPAddressDemo {
public static void main(String[] args) throws UnknownHostException {
final InetAddress localHost = InetAddress.getLocalHost();
String canonicalHostName = localHost.getCanonicalHostName();
String hostname = localHost.getCanonicalHostName();
String ipAddress = localHost.getHostAddress();
System.out.println("HostName is :"+hostname);
System.out.println("Canonical hostname is:"+canonicalHostName);
System.out.println("IPAddress is :"+ipAddress);
}
}
Output: Network information for localhost in java
HostName is :MyHostName-domainserver.com
Canonical hostname is:MyHostName-domainserver.com
IPAddress is :192.128.26.215
