InetAddress.getByAddress(byte[]) in Java

InetAddress.getByAddress(byte[]): This method is available in the java.net.InetAddress class of Java.

Syntax:

InetAddress java.net.InetAddress.getByAddress(byte[] addr) throws UnknownHostException

This method takes one argument. This method returns an InetAddress object given the raw IP address .The argument is in network byte order: the highest orderbyte of the address is in getAddress()[0].

Parameters: One parameter is required for this method.

addr: the raw IP address in network byte order.

Returns: an InetAddress object created from the raw IP address.

Throws:

1. UnknownHostException - if IP address is of illegal length.

Approach 1: When no exception

Java

package com.InetAddress;

import java.net.InetAddress;
import java.net.UnknownHostException;

public class InetAddressgetByAddress {
    public static void main(String[] args) 
                    throws UnknownHostException {

        byte addr[] = { 1, 2, 3, 4, 5, 6, 7, 8,
                         9, 1, 2, 3, 4, 5, 6, 7 };
        InetAddress inetAddress = 
                      InetAddress.getByAddress(addr);

        System.out.println(inetAddress);
    }
}

Output:

/102:304:506:708:901:203:405:607

Approach 2: UnknownHostException 

Java

package com.InetAddress;

import java.net.InetAddress;
import java.net.UnknownHostException;

public class InetAddressgetByAddress {
    public static void main(String[] args) 
                     throws UnknownHostException {

        byte addr[] = { 1, 2, 3, 4, 5, 6, 7, 
                       8, 9, 1, 2, 3, 4, 5, 6 };
        InetAddress inetAddress = 
                    InetAddress.getByAddress(addr);

        System.out.println(inetAddress);
    }
}

Output:

Exception in thread "main" java.net.UnknownHostException: addr is of illegal length
	at java.base/java.net.InetAddress.getByAddress(InetAddress.java:1210)
	at java.base/java.net.InetAddress.getByAddress(InetAddress.java:1573)
	at com.InetAddress.InetAddressgetByAddress.main(InetAddressgetByAddress.java:10)

Some other methods of InetAddress class

equals(Object): This method compares this object against the specified object.

getAddress(): This method returns the raw IP address of this InetAddress object.

InetAddress.getAllByName(String host): This method returns an array of its IP addresses, based on the configured name service on the system.

InetAddress.getByAddress(byte[]): This method returns an InetAddress object given the raw IP address.

InetAddress.getByAddress(String, byte[]): This method creates an InetAddress based on the provided hostname and IP address.

InetAddress.getByName(String): This method determines the IP address of a host, given the host's name.

getCanonicalHostName(): This method gets the fully qualified domain name for this IP address.

getHostAddress(): This method returns the IP address string in textual presentation.

getHostName(): This method gets the hostname for this IP address.

InetAddress.getLocalHost(): This method returns the address of the local host. 

InetAddress.getLoopbackAddress(): This method returns the loopback address.

hashCode(): This method returns a hashcode for this IP address.

isAnyLocalAddress(): Utility routine to check if the InetAddress is a wildcard address.

isLinkLocalAddress(): Utility routine to check if the InetAddress is a link-local address.

isLoopbackAddress(): Utility routine to check if the InetAddress is a loopback address.

isMCGlobal(): Utility routine to check if the multicast address has global scope.

isMCLinkLocal(): Utility routine to check if the multicast address has link scope.

isMCNodeLocal(): Utility routine to check if the multicast address has node scope.

isMCOrgLocal(): Utility routine to check if the multicast address has organization scope.

isMCSiteLocal(): Utility routine to check if the multicast address has site scope.

isMulticastAddress(): Utility routine to check if the InetAddress is an IP multicast address.

isReachable(int): This method tests whether that address is reachable.

isReachable(NetworkInterface, int, int): This method tests whether that address is reachable.

isSiteLocalAddress(): Utility routine to check if the InetAddress is a site-local address.

toString(): This method converts this IP address to a String.