Trouble finding a place for my event handler

I'm a newbie on my first work programme. I'm trying to teach myself JavaFX by creating a program simple Tic-Tac-Toe. I created an AnchorPane to hold the TIC-TAC-TOE grid which consists of 4 Cree-crossing lines that have been created in the JavaFX scene generator. There are 2 horizontal and 2 vertical lines. In the Java program, I loaded my FXML file and my TIC-TAC-TOE grid looks great. I created 9 ImageView that match 9 of TIC-TAC-TOE squares. I load those with x.jpg or o.jpg images. Those that work very well and I can see them on my network manually.

I can't find out how to make them appear if I click in one of the squares. I created a rectangle and is the same color as the grid and without border and place in the center square. I put a fx:id = "MMR" (medium-medium rectangle) and an onMouseClicked = "#handleRMM" in the FXML file.

I created an event handler, and I know it's because I put System.out.println ("Clicked!"); and I can see it on the NetBeans console. But the rest of the event to display the X does not appear.

I can't get to work in the main part public class handler extends Application of the program. But the AnchorPane, my ImageViews and everything is defined in part public void start (primaryStage stage) of the program. For this purpose, I can not access the ImageViews to the event handler. I will list my code, and I hope someone can tell me what I'm doing wrong. Thanks in advance.

David
package tictactoe;
 
 
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.*;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;
 
/**
 *
 * @author David
 */
public class Main extends Application {
 
    
    /**
     * @param args the command line arguments
     */
    public void main(String[] args) {
        Application.launch(Main.class, (java.lang.String[])null);
    }
 
    @Override
    public void start(Stage primaryStage) {
        
        
        try {
                        
           
            AnchorPane page = (AnchorPane) FXMLLoader.load(Main.class.getResource("TicTacToe.fxml"));
            Scene scene = new Scene(page);
            
            primaryStage.setScene(scene);
            scene.getStylesheets().add("tictactoe/tictactoe.css");
            primaryStage.setTitle("TicTacToe");
            ImageView mm =new ImageView();//Middle Middle
            final ImageView lt =new ImageView();//Left Top
            final ImageView lm =new ImageView();//Left Middle
            final ImageView lb =new ImageView();//Left Bottom
            final ImageView tm =new ImageView();//Top Middle
            final ImageView bm =new ImageView();//Bottom Middle
            final ImageView rt =new ImageView();//Right Top
            final ImageView rm =new ImageView();//Right Middle
            ImageView rb =new ImageView();//Right Bottom
            //mm.setImage(new Image("tictactoe/images/x.jpg"));
           
            //page.getChildren().add(mm);
            
            mm.relocate(246,145); mm.setFitWidth(100); mm.setFitHeight(100);
            lt.relocate(107,35);
            lm.relocate(107,145);
            lb.relocate(107,260);
            tm.relocate(246,35);
            bm.relocate(246,260);
            rt.relocate(375,35);
            rm.relocate(375,145);
            rb.relocate(375,260);
            
            page.getChildren().add(mm);
            //page.getChildren().remove(mm);
            page.getChildren().add(lt);
            page.getChildren().add(lm);
            page.getChildren().add(lb);
            page.getChildren().add(tm);
            page.getChildren().add(bm);
            page.getChildren().add(rt);
            page.getChildren().add(rm);
            page.getChildren().add(rb);
        
            primaryStage.show();  
            
        
        }
           
                             
     
        
        catch (Exception ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
                    }
            
    
    }

     
    public void handleRMM() {
        
       ImageView mm =new ImageView();
        mm.relocate(246,145); mm.setFitWidth(100); mm.setFitHeight(100);
        mm.setImage(new Image("tictactoe/images/x.jpg"));
        
        System.out.println("Clicked!");
    }
    
}
and my FXML file:
<?xml version="1.0" encoding="UTF-8"?>

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.image.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.shape.*?>
<?scenebuilder-stylesheet tictactoe.css?>

<AnchorPane id="AnchorPane" fx:id="anchor" prefHeight="400.0" prefWidth="600.0" style="" xmlns:fx="http://javafx.com/fxml" fx:controller="tictactoe.Main">
  <children>
    <Line endX="100.0" endY="1.0" layoutX="15.0" layoutY="125.0" startX="450.0" startY="1.0" />
    <Line endX="100.0" endY="0.0" layoutX="15.0" layoutY="250.0" startX="450.0" startY="0.0" />
    <Line endX="-100.0" endY="-125.0" layoutX="301.0" layoutY="158.0" startX="-102.0" startY="180.0" />
    <Line endX="-100.0" endY="-125.0" layoutX="465.0" layoutY="163.0" startX="-100.0" startY="180.0" />
    <Rectangle id="rlt" fx:id="rmm" arcHeight="5.0" arcWidth="5.0" fill="WHITE" height="122.50001525878906" layoutX="202.0" layoutY="127.0" onMouseClicked="#handleRMM" stroke="WHITE" strokeType="INSIDE" width="163.4998779296875" />
  </children>
</AnchorPane>

Just my $0.02 worth.

Any interactive game is a starting point quite complex. The logic of a game is quite complex (even if it's a really simple game). TIC-TAC-TOE, you'll not only to deal with the mouse click but you need a way to tell if it's a valid move (i.e. If the place is not already busy). Is not difficult in itself, but you need to know where to keep the underlying data to this logic, and really data (State of play) must be independent of the display of the game: in short, at a certain level, you will need to understand the model-view-controller architecture.

Now you are at the stage where you're still trying to understand the syntax of the language, and you have little chance to learn than just trying codes and post on the forums. Of course, you can look at other resources too and there are more resources for learning Java I can possibly list, but perhaps Oracle's Java tutorial [url http://docs.oracle.com/javase/tutorial/java/index.html] would be a good starting point. Understand the first three chapters or so meets immediate syntax issues you encounter.

If you have other references, Kathy Sierra "head first Java" and "Thinking in Java" Bruce Eckel are the ones who always get good customers.

Tags: Java

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    I suppose my confusion comes from not knowing what a listener does exactly, it uses all the resources I look for an event?

    (added)

    After typing all this, a good comparison would be closer to an event listener is nothing else than a way to call a function and is not otherwise using resources?

    My question is still, but I'm leaning towards several Auditors and managers.

    (add 2)

    Sorry my brain blurs, I'm not good at explaining things.  I think it's a little clearer.

    For 1 menu I 1 this.addEventListener, and in the Manager, he has several if (menu_itemX.name == "nameX").
    It is better to have 1 eventListener in this situation, or would it be better to have several menu_itemX.addEventListener and managers separated for each action?

    (follow-up question)

    I did addEventListener when the menu opens and removeEventListener when the menu closes.  If the event listeners do not use 'no' resources unless their event fires is a bad practice for simple click and mouseover events mouseout/mouseouthandler()?  Should I just leave the event listeners here all the time?

    (sample code)

    If this makes it more clear which of these would work better?

    Version 1:

    this.menu1.addEventListener(MouseEvent.MOUSE_DOWN, clickHandler1);
this.menu2.addEventListener(MouseEvent.MOUSE_DOWN, clickHandler2);
this.menu3.addEventListener(MouseEvent.MOUSE_DOWN, clickHandler3);
this.menu4.addEventListener(MouseEvent.MOUSE_DOWN, clickHandler4);
this.menu5.addEventListener(MouseEvent.MOUSE_DOWN, clickHandler5);

function clickHandler1(e:Event):void{}
function clickHandler2(e:Event):void{}
function clickHandler3(e:Event):void{}
function clickHandler4(e:Event):void{}
function clickHandler5(e:Event):void{}

    version 2:

    this.addEventListener(MouseEvent.MOUSE_DOWN, clickHandler);

function clickhandler(e:Event):void{
if(e.target.name == "menu1"){}
else if(e.target.name == "menu2"){}
else if(e.target.name == "menu3"){}
else if(e.target.name == "menu4"){}
else if(e.target.name == "menu5"){}
}

    the leave it alone as long as your menu works as expected while adding them.

    leaving the listener takes memory.  removing it frees this memory.

    but free up memory and adding memory uses system resources, especially when free memory flash gc.  It is unnecessary to repeatedly the gc objects that will be added to memory later.

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