Java program to find IP address of your computer
An IP(Internet Protocol) address is an identifier assigned to each computer and another device (e.g., router, mobile, etc) connected to a TCP/IP network that is used to locate and identify the node in communication with other nodes on the network. IP addresses are usually written and displayed in human-readable notation such as 192.168.1.35 in IPv4(32-bit IP address).
An IP address serves two principal functions: host or network interface identification and local addressing. Its role has been characterized as follows: “A name indicates what we seek. An address indicates where it is. A route indicates how to get there.”
Prerequisites : Networking in Java | Set 1 (InetAddress class), trim() in Java.
InetAddress.getLocalHost() is used to find the private IP addresses used in LAN or any other local network.
To find public IP, we use http://bot.whatismyipaddress.com (An online utility to find your public IP), we open the URL, read a line and print the line.
Below is the Java implementation of the above steps.
Java
import java.net.*;
import java.io.*;
import java.util.*;
import java.net.InetAddress;
public class JavaProgram
{
public static void main(String args[]) throws Exception
{
InetAddress localhost = InetAddress.getLocalHost();
System.out.println( "System IP Address : " +
(localhost.getHostAddress()).trim());
String systemipaddress = "" ;
try
{
BufferedReader sc =
new BufferedReader( new InputStreamReader(url_name.openStream()));
systemipaddress = sc.readLine().trim();
}
catch (Exception e)
{
systemipaddress = "Cannot Execute Properly" ;
}
System.out.println( "Public IP Address: " + systemipaddress + "\n" );
}
}
|
Output:
System IP Address : 10.0.8.204
Public IP Address : 35.166.48.97
Note: The above output is for a machine that is used by GeeksforGeeks online compiler, ide.geeksforgeeks.org
Last Updated :
09 Nov, 2021
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