External Interfaces/API

Example - Finding an Internet Protocol Address

The resolveip function returns either the name or address of an IP (internet protocol) host. If you pass resolveip a hostname, it returns the IP address. If you pass resolveip an IP address, it returns the hostname. The function uses the Java API class java.net.InetAddress, which enables you to find an IP address for a hostname, or the hostname for a given IP address, without making DNS calls.

resolveip calls a static method on the InetAddress class to obtain an InetAddress object. Then, it calls accessor methods on the InetAddress object to get the hostname and IP address for the input argument. It displays either the hostname or the IP address, depending on the program input argument.

Running the Example

Description of resolveip