The type java.io.ObjectInputStream cannot be resolved (eclipse)

Question

I'm trying to do a simple client server program using Java RMI through Eclipse (version Helios Service Release 1). For the server side, I defined an interface, and a class that implements that interface. In the class I imported java.rmi., and java.rmi.server. API´s so here is where I have the error

The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files

The version of my JRE is jre1.8.0_221 I tried to configure the build path by removing and adding the JRE System Library by default, cleaning the project, creating a new project. Basically, I`ve tried most of the options provided in stackOverflow for this kind of issue.

// The Interface
import java.rmi.*;
public interface HelloInterface extends Remote {
    public String sayHello(String name) throws RemoteException;
}

// The class where I implement the interface

import java.rmi.*;
import java.rmi.server.*;

public class HelloImpl extends UnicastRemoteObject implements 
HelloInterface {

private static final long serialVersionUID = 1L;

public HelloImpl() throws RemoteException {
  super( );
}

public String sayHello(String name) throws RemoteException {
    return "Hello, World!" + name;
    }
}

// The main program

import java.rmi.*;
import java.rmi.registry.LocateRegistry;

public class HelloServer{
    public static void main(String args[]){
        try {     
            int port = 16790; 
            String host = "localhost";
            HelloImpl exportedObj = new HelloImpl();
            LocateRegistry.createRegistry(port);
            String registryURL = "rmi://" + host + ":" + port + "/hello";
            Naming.rebind(registryURL, exportedObj);
            System.out.println("Hello Server ready.");
         }catch (Exception e){
             e.printStackTrace();
         }
    }
}

I expect the output Hello Server Ready, but the program does not compile showing the error:

The type java.io.ObjectInputStream cannot be resolved. It is indirectly referenced from required .class files

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