In this example we shall show you how to retrieve the IP address and hostname from the local host. To get the IP address and hostname from the local machine one should perform the following steps :
- Retrieve the Address object for the local host. This object contains all address related information about the specific host
- Use the
getAddress()API method to get a byte array representation of the IP address of the specific host. In order to convert the byte array representation to a more readable one you may perform a conversion like the one shown in the code snippet below - Use the
getHostName()API method to retrieve the hostname of the specific host
as demonstrated in the code snippet that follows.
package com.javacodegeeks.snippets.core;
import java.net.InetAddress;
import java.net.UnknownHostException;
public class GetIPAddressAndHostnameFromLocalMachine {
public static void main(String[] args) {
try {
InetAddress inetAddr = InetAddress.getLocalHost();
byte[] addr = inetAddr.getAddress();
// Convert to dot representation
String ipAddr = "";
for (int i = 0; i < addr.length; i++) {
if (i > 0) {
ipAddr += ".";
}
ipAddr += addr[i] & 0xFF;
}
String hostname = inetAddr.getHostName();
System.out.println("IP Address: " + ipAddr);
System.out.println("Hostname: " + hostname);
}
catch (UnknownHostException e) {
System.out.println("Host not found: " + e.getMessage());
}
}
}
This was an example of how to get the IP and hostname of the local host in Java.
