$***$JAVAFX$***$ How can this be cleaned up and make the observeQueue and queueListView reflect the queue$/$deque more effectively?:

import java.util.$*$;

import javafx.application.Application;

import javafx.collections.FXCollections;

import javafx.collections.ObservableList;

import javafx.scene.Scene;

import javafx.scene.control.Button;

import javafx.scene.control.ContentDisplay;

import javafx.scene.control.Label;

import javafx.scene.control.ListView;

import javafx.scene.control.RadioButton;

import javafx.scene.control.TextField;

import javafx.scene.control.ToggleGroup;

import javafx.scene.layout.Background;

import javafx.scene.layout.Pane;

import javafx.scene.paint.Color;

import javafx.stage.Stage;

public class VisualQueue extends Application$\{$

$/*$It$\text{'}$s close but not quite a full visual queue, just like the other one I

can't get the list view to add$/$remove correctly every time, and I don't think the

queue is filling up correctly with each addition$*/$

Deque queue $=$ new LinkedList$<>()$;

ObservableList observeQueue $=$ FXCollections.observableArrayList$()$;

ListView queueListView $=$ new ListView$<>($observeQueue$)$;

TextField textInput $=$ new TextField$()$;

Button enqueue $=$ new Button$("$ENQUEUE$")$;

Button dequeue $=$ new Button$("$DEQUEUE$")$;

Button peek $=$ new Button$("$PEEK$")$;

RadioButton fifo $=$ new RadioButton$("$FIFO$")$;

RadioButton lifo $=$ new RadioButton$("$LIFO$")$;

ToggleGroup group $=$ new ToggleGroup$()$;

Label head $=$ new Label$("$HEAD$")$;

Label tail $=$ new Label$("$TAIL$")$;

Label errorText $=$ new Label$()$;

Label title $=$ new Label$("$My Visual Queue"$)$;

Label dequeueLabel $=$ new Label$()$;

Label peekLabel $=$ new Label$()$;

Label error $=$ new Label$("$Error:$")$;

Label queueLabel $=$ new Label$("$Queue$")$;

public void start$($Stage primaryStage$)\{$

fifo.setTextFill$($Color$.$WHITE$)$;

lifo.setTextFill$($Color$.$WHITE$)$;

fifo.setContentDisplay$($ContentDisplay$.$RIGHT$)$;

lifo.setContentDisplay$($ContentDisplay$.$RIGHT$)$;

fifo.setToggleGroup$($group$)$;

lifo.setToggleGroup$($group$)$;

fifo.setFocusTraversable$($true$)$;

errorText.setMinSize$(600,10)$;

errorText.setBackground$($Background$.$fill$($Color$.$WHITE$))$;

title.setTextFill$($Color$.$WHITE$)$;

error.setTextFill$($Color$.$WHITE$)$;

head.setTextFill$($Color$.$WHITE$)$;

tail.setTextFill$($Color$.$WHITE$)$;

dequeueLabel.setTextFill$($Color$.$WHITE$)$;

queueLabel.setTextFill$($Color$.$WHITE$)$;

peekLabel.setTextFill$($Color$.$WHITE$)$;

textInput.setMinSize$(10,10)$;

$//$enqueue

enqueue.setMinSize$(100,10)$;

enqueue.setOnAction$($e$->\{$

if$($fifo$.$isSelected$()==$ true$)\{$

queue.addFirst$($textInput$.$getText$())$;

observeQueue.add$(0,$textInput.getText$())$;

$\}$

else if$($lifo$.$isSelected$()==$ true$)\{$

queue.addLast$($textInput$.$getText$())$;

observeQueue.add$($observeQueue$.$size$()-1,$textInput.getText$())$;

$\}$

textInput.clear$()$;

$\})$;

$//$dequeue

dequeue.setMinSize$(100,10)$;

dequeue.setOnAction$($e $->\{$

try$\{$

if$(!$queue.isEmpty$()$ && fifo.isSelected$()==$ true$)\{$

dequeueLabel.setText$(($String$)$queue$.$removeFirst$())$;

observeQueue.remove$($queue$.$removeFirst$())$;

queue.removeFirst$()$;

$\}$

else if$(!$queue.isEmpty$()$ && lifo.isSelected$()==$ true$)\{$

dequeueLabel.setText$(($String$)$queue$.$removeLast$())$;

observeQueue.remove$($queue$.$removeLast$())$;

queue.removeLast$()$;

$\}$

$\}$

catch$($Exception er$)\{$

errorText.setText$($er$.$toString$())$;

$\}$

$\})$;

$//$peek

peek.setMinSize$(100,10)$;

peek.setOnAction$($e $->\{$

try$\{$

if$(!$queue.isEmpty$()$ && fifo.isSelected$()==$ true$)\{$

peekLabel.setText$(($String$)$queue$.$getFirst$())$;

queue.getFirst$()$;

$\}$

else if$(!$queue.isEmpty$()$ && lifo.isSelected$()==$ true$)\{$

peekLabel.setText$(($String$)$queue$.$getLast$())$;

queue.getLast$()$;

$\}$

$\}$

catch$($Exception er$)\{$

errorText.setText$($er$.$getMessage$())$;

$\}$

$\})$;

Pane backgroundPane $=$ new Pane$()$;

backgroundPane.setBackground$($Background$.$fill$($Color$.$BLUE$))$;

backgroundPane.getChildren$().$addAll$($title$,$fifo,lifo,enqueue,dequeue, dequeueLabel,peek,

textInput,peekLabel,queueListView, queueLabel,

error, errorText, head,tail$)$;

title.setLayoutX$(30)$;

title.se