Hi am encountering error in my javafx application in which after i enter numbers through my keypad ands press the please enter button it just clears the text and nothing else. i will shaare the codexs with yuou please checjk the problemm

ATM.java

package atm.application;

import javafx.scene.control.TextArea;

public class ATM$\{$

$//$attributes

private boolean userAuthenticated;

private int currentAccountNumber;

private TextArea text;

private BankDatabase bank;

$//$Main menu constants

private final static int BALANCE$\_$INQUIRY $=1$;

private final static int WITHDRAWAL $=2$;

private final static int DEPOSIT $=3$;

private final static int EXIT $=4$;

public ATM$($TextArea text$)\{$

this.text $=$ text;

userAuthenticated $=$ false;

currentAccountNumber $=0$;

bank $=$ new BankDatabase$()$;

$\}$

private void authenticateUser$($int accNo, int pin$)\{$

userAuthenticated $=$ bank.authenticateUser$($accNo$,$ pin$)$;

$//$authentication

if $($userAuthenticated$)\{$

currentAccountNumber $=$ accNo;

displayMessage$("$

Welcome"$)$;

$\}$

else$\{$

displayMessage$("$

Invalid accoung number of PIN. Please try again"$)$;

$\}$

$\}$

public void performTransactions$($int sel$)\{$

Transaction currentTransaction $=$ createTransaction$($sel$)$;

if $($currentTransaction $!=$ null $)\{$

currentTransaction.execute$()$;

$\}$

$\}$

private Transaction createTransaction$($int type$)\{$

Transaction transaction $=$ null;

switch $($type$)\{$

case BALANCE$\_$INQUIRY:

transaction $=$ new BalanceInquiry$($currentAccountNumber$,$text, bank$)$;

break;

case WITHDRAWAL:

transaction $=$ new Withdrawal$($currentAccountNumber$,$text,bank$)$;

break;

case DEPOSIT:

transaction $=$ new Deposit$($currentAccountNumber$,$ text, bank$)$;

break;

$\}$

return transaction;

$\}$

private void displayMainMenu$()\{$

text.clear$()$;

displayMessageLine$("$

Main Menu"$)$;

displayMessageLine$("1-$ View my balance"$)$;

displayMessageLine$("2-$ Withdraw cash"$)$;

displayMessageLine$("3-$ Deposit funds"$)$;

displayMessageLine$("4-$ Exit

$")$;

displayMessage$("$Enter a choice! $")$;

$\}$

public void displayMessage$($String msg$)\{$

text.appendText$($msg$)$;

$\}$

public void displayMessageLine$($String msg$)\{$

text.appendText$($msg $+"$

$")$;

$\}$

$\}$

AtmApp

package atm.application;

import javafx.application.Application;

import javafx.event.ActionEvent;

import javafx.event.EventHandler;

import javafx.scene.Scene;

import javafx.scene.control.Button;

import javafx.scene.layout.StackPane;

import javafx.stage.Stage;

import javafx.scene.control.TextArea;

import javafx.scene.layout.GridPane;

import javafx.scene.layout.BorderPane;

import javafx.geometry.Insets;

public static void main$($String$[]$ args$)\{$

launch$($args$)$;

$\}$

@Override

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

primarystage.setTitle$("$Application for ATM"$)$;

text $=$ new TextArea$()$;

text.setEditable$($false$)$;

Button$[]$ digit $=$ new Button$[10]$;

for$($int i $=0$; i $<10$; i$++)\{$

digit$[$i$]=$ new Button$($String$.$valueOf$($i$))$;

final int dig $=$ i;

digit$[$i$].$setOnAction$($e$->\{$

String current $=$ text.getText$()$;

text.setText$($current $+$ dig$)$;$\})$;$\}$

Button enter $=$ new Button$("$Please enter"$)$;

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

try$\{$

int in $=$ Integer.parseInt$($text$.$getText$().$trim$())$;

atm.performTransactions$($in$)$;

text.clear$()$;

$\}$

catch$($NumberFormatException ex$)\{$

displayMessage$("$Enter a valid input"$)$;

$\}$

$\}$

$)$;

GridPane grid $=$ new GridPane$()$;

grid.setPadding$($new Insets$(20))$;

grid.setHgap$(10)$;

grid.setVgap$(10)$;

grid.add$($text$,0,0,3,1)$;

for$($int i $=1,$ dig $=1$; i $<4$; i$++)\{$

for$($int k $=0$; k $<3$; k$++,$ dig$++)\{$

grid.add$($digit$[$dig$],$k$,$i$)$;

$\}$

$\}$

grid.add$($digit$[0],1,4)$;

grid.add$($enter$,2,4)$;

Scene s $=$ new Scene$($grid$,500,400)$;

primarystage.setScene$($s$)$;

primarystage.show$()$;

atm $=$ new ATM$($text$)$;

$\}$

private void displayMessage$($String msg$)\{$

text.appendText$($msg$+"$

$")$;

$\}$

$\}$