Hi I`m trying to send mail Notification on remote server but I just can`t see it work !!

I found here the way but the code not working
https://www.dukascopy.com/wiki/en/development/strategy-api/practices/send-email
here is my code

package jforex;

import java.util.*;

import com.dukascopy.api.*;

public class Strategy implements IStrategy {
    private IEngine engine;
    private IConsole console;
    private IHistory history;
    private IContext context;
    private IIndicators indicators;
    private IUserInterface userInterface;
    
    public void onStart(IContext context) throws JFException {
        this.engine = context.getEngine();
        this.console = context.getConsole();
        this.history = context.getHistory();
        this.context = context;
        this.indicators = context.getIndicators();
        this.userInterface = context.getUserInterface();
        
        
        JFUtils utils = context.getUtils();

        try {
             Future<IEmailResponse> future = utils.sendMail("[email protected]", "subject", "text");
             console.getOut().println("Waiting on response");
             IEmailResponse response = future.get(30, TimeUnit.SECONDS);
             if (response.isError()) {
                 console.getErr().println(response);
             } else {
                 console.getOut().println("e-mail successfully sent!");
             }
         } catch (Exception e) {
             e.printStackTrace(console.getErr());
         }
        
        
        
    }

    public void onAccount(IAccount account) throws JFException {
    }

    public void onMessage(IMessage message) throws JFException {
    }

    public void onStop() throws JFException {
    }

    public void onTick(Instrument instrument, ITick tick) throws JFException {
    }
    
    public void onBar(Instrument instrument, Period period, IBar askBar, IBar bidBar) throws JFException {
    }
}

14:50:11 ----------
14:50:11 TimeUnit cannot be resolved to a variable
14:50:11 ^^^^^^^^
14:50:11 IEmailResponse response = future.get(30, TimeUnit.SECONDS);
14:50:11 4. ERROR in C:\Users\GÜLENYILDIZ NET CAFE\AppData\Local\JForex\G_LENYILDIZ_NET_CAFE\jfxide\tmp\compile\Strategy.java (at line 29)
14:50:11 ----------
14:50:11 IEmailResponse cannot be resolved to a type
14:50:11 ^^^^^^^^^^^^^^
14:50:11 IEmailResponse response = future.get(30, TimeUnit.SECONDS);
14:50:11 3. ERROR in C:\Users\GÜLENYILDIZ NET CAFE\AppData\Local\JForex\G_LENYILDIZ_NET_CAFE\jfxide\tmp\compile\Strategy.java (at line 29)
14:50:11 ----------
14:50:11 IEmailResponse cannot be resolved to a type
14:50:11 ^^^^^^^^^^^^^^
14:50:11 Future<IEmailResponse> future = utils.sendMail("[email protected]", "subject", "text");
14:50:11 2. ERROR in C:\Users\GÜLENYILDIZ NET CAFE\AppData\Local\JForex\G_LENYILDIZ_NET_CAFE\jfxide\tmp\compile\Strategy.java (at line 27)
14:50:11 ----------
14:50:11 Future cannot be resolved to a type
14:50:11 ^^^^^^
14:50:11 Future<IEmailResponse> future = utils.sendMail("[email protected]", "subject", "text");
14:50:11 1. ERROR in C:\Users\GÜLENYILDIZ NET CAFE\AppData\Local\JForex\G_LENYILDIZ_NET_CAFE\jfxide\tmp\compile\Strategy.java (at line 27)
14:50:11 ----------

That Helped , Thanks Alot
but can I put every Variable inside the messege in a new line
I tried This

Future<IEmailResponse> future = utils.sendMail("[email protected]", "subject", " " + Variable_1 + " /n " + Variable_2 + "/n " + Variable_3);