i need help coding this in java:

A university has the following dormitories:

Allen Hall: $$1,800$ per semester

Pike Hall: $$2,200$ per semester

Farthing Hall: $$2,800$ per semester

University Suites: $$3,000$ per semester

The university also offers the following meal plans:

$7$ meals per week: $$600$ per semester

$14$ meals per week: $$1,100$ per semester

Unlimited meals: $$1,800$ per semester

Create an application with two ComboBox controls. One should hold the names of the dormitories, and the other should hold the meal plans. The user should select a dormitory and a meal plan, and the application should show the total charges for the semester.

this is in main.java

import javafx.application.Application;

import javafx.stage.Stage;

import javafx.scene.Scene;

import javafx.scene.layout.VBox;

import javafx.scene.layout.HBox;

import javafx.geometry.Pos;

import javafx.geometry.Insets;

import javafx.scene.control.Label;

import javafx.scene.control.Button;

import javafx.scene.control.ComboBox;

$/**$

Dorm and Meal Plan Calculator

$*/$

public class DormAndMealPlan extends Application

$\{$

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

$\{$

$//$ Launch the application.

launch$($args$)$;

$\}$

@Override

public void start$($Stage primaryStage$)$

$\{$

$//$ Build the Dorm ComboBox.

$//$ Label to prompt the user to select a dorm

$//$ Build the Meal Plan ComboBox.

$//$ Label to prompt the user to select a meal plan

$//$ Create the output label for total cost.

$//$ Create the Calculate button.

$//$ Register event handler for the button

calcButton.setOnAction$($event $->$

$\{$

double dormCharges $=0\mathrm{.}0$;

double mealCharges $=0\mathrm{.}0$;

double totalCharges $=0\mathrm{.}0$;

if $($dormComboBox$.$getValue$()!=$ null$)$

$\{$

String dorm $=$ dormComboBox.getValue$()$;

if $($dorm$.$equals$("$Allen Hall"$))$

dormCharges $=1800\mathrm{.}0$;

else if $($dorm$.$equals$("$Pike Hall"$))$

dormCharges $=2200\mathrm{.}0$;

else if $($dorm$.$equals$("$Farthing Hall"$))$

dormCharges $=2800\mathrm{.}0$;

else if $($dorm$.$equals$("$University Suites"$))$

dormCharges $=3000\mathrm{.}0$;

else

dormCharges $=0\mathrm{.}0$;

$\}$

if $($mealComboBox$.$getValue$()!=$ null$)$

$\{$

$//$code for mealComboBox

$\}$

$//$ Get the total charges

totalCharges $=$ dormCharges $+$ mealCharges;

$//$ Display the charges.

costOutputLabel$.$setText$($String$.$format$("\%,\mathrm{.}2$f$",$ totalCharges$))$;

$\})$;

$//$ Put everything into a VBox

VBox mainVBox $=$ new VBox$(10,$ dormAndMealHBox, costHBox$,$ calcButton$)$;

mainVBox.setAlignment$($Pos$.$CENTER$)$;

mainVBox.setPadding$($new Insets$(10))$;

$//$ Add the main VBox to a scene.

Scene scene $=$ new Scene$($mainVBox$)$;

$//$ Set the scene to the stage aand display it$.$

primaryStage.setScene$($scene$)$;

primaryStage.show$()$;

$\}$

$\}$

this is in problem.txt:

show output as well, please.