import java.net.*;

public class NetServ {
	public static void main(String[] args) {
		ServerSocket s = new ServerSocket();
		InetSocketAddress sa = new InetSocketAddress("127.0.0.1", 9999); 
		s.bind(sa);
		
		s.close();

	}
}



Exception in thread "main" java.lang.Error: Unresolved compilation problems: 
	Unhandled exception type IOException
	Unhandled exception type IOException
	Unhandled exception type IOException

	at NetServ.main(NetServ.java:11)