jruby gethostname implementation

gistfile1.txt

gdb@tyler:~$ javac HostnameTest.java 
gdb@tyler:~$ java HostnameTest 
0.0.0.0
gdb@tyler:~$ java -version
java version "1.7.0_21"
Java(TM) SE Runtime Environment (build 1.7.0_21-b11)
Java HotSpot(TM) Server VM (build 23.21-b01, mixed mode)

HostnameTest

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

public class HostnameTest {

    public static void main(String[] args) {
        try {
           System.out.println(InetAddress.getByAddress(new byte[]{0,0,0,0}).getHostName());
        } catch (UnknownHostException e2) {
           System.out.println("Caught UnknownHostException");
        }
    }

}