Program get localhost IPAddress & Hostname in java (example)

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

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