API to get computer name

Question

i want to get computer name in Java program. I tried to use System.getProperty(), but seems like there is no appropriate key.
please advise. thanks!!

Answer 1

Here's some different ways using java.net package to get various names and numbers. Of course, this requires a network id.
import java.net.*;
public class GetIPAddress {
    public static void main(String[] args) throws UnknownHostException {
        System.out.println(InetAddress.getLocalHost());
        System.out.println(InetAddress.getLocalHost().getHostName());
        System.out.println(InetAddress.getLocalHost().getHostAddress());
        System.out.println
            ("+++ If there is more than 1 IP address for HostName +++");
        InetAddress[] inet = InetAddress.getAllByName(InetAddress.getLocalHost().getHostAddress());
        for (int x = 0; x < inet.length; x++)
            System.out.println
                ("IP " + (x + 1) + ": " + inet[x].toString().substring(1));
}The following one takes an IP address argument.
import java.net.*;
public class GetIPName
    public static void main(String[] args)
        try
            // Look up ip address, eg 123.123.123.123
            InetAddress local = InetAddress.getByName(args[0]);
            System.out.println(local.getHostAddress());
            System.out.println(local.getHostName());
            System.out.println(local.getCanonicalHostName());
        catch(Exception e)
            e.printStackTrace();
}