import java.rmi.registry.*;
import java.rmi.*;
public class RegistryNames
{
public static void main(String[] args)
{
if(args.length > 1)
{
System.out.println("USAGE: java RegistryNames [port number]");
return;
}
String[] names;
int portNumber = (args.length == 1) ?
Integer.parseInt(args[0]) : Registry.REGISTRY_PORT;
try
{
names = LocateRegistry.getRegistry(portNumber).list();
}
catch(RemoteException e)
{
System.out.println("Cannot connect to RMI registry on port " +
portNumber);
return;
}
System.out.println("RMI registry is running on port " + portNumber +
((portNumber == Registry.REGISTRY_PORT) ?
" (the default port number)" :
" (a user defined port number)"));
System.out.println((names.length == 0) ? "NO names are in use." :
"The following name" + ((names.length == 1) ?
" is" : "s are") + " in use:");
for(int i = 0; i < names.length; i++)
{
System.out.println(names[i]);
}
}
}