(Its an app) (Miles-per-Gallon Calculator App) In JAVA with comments Open Netbea

Question

(Its an app) (Miles-per-Gallon Calculator App) In JAVA with comments

Open Netbeans IDE

Go to file > New project > JAVAFX > JAVAFX > FXML Application

Set required properties for the project

open<filename>.fxml in JavaFX Screen Builder

Place AnchorPane in design and set its attributes

Place mileTextField, gallonsTextField and calcButton on the AnchorPane and set their attributes

Place label that will show the calculated value and set its attributes

Set the controller function on the left side of JavaFX screen Builder and asign TextFields, label, and button with their respective fx:id's

Drivers often want to know the miles per gallon their cars get so they can estimate gasoline costs. Develop an app that allows the user to input the number of miles driven and the number of gallons used and calculates and displays the corresponding miles per gallon.

Explanation / Answer

Miles-per-Gallon Calculator App

Below is the code for javafx of miles per gallon app. It calculates MPG using user input of miles and gallons.

FXMLDocument.fxml

<?xml version="1.0" encoding="UTF-8"?>

<?import java.net.*?>

<?import javafx.geometry.*?>

<?import javafx.scene.control.*?>

<?import javafx.scene.layout.*?>

<?import javafx.scene.text.*?>

<AnchorPane id="AnchorPane" prefHeight="200" prefWidth="320" xmlns:fx="http://javafx.com/fxml/1" fx:controller="mpg.FXMLDocumentController">

<children>

<Label text="Enter Miles:" layoutX="20" layoutY="50" minHeight="16" minWidth="69" fx:id="miles" />

<TextField layoutX="100" layoutY="50" minHeight="16" minWidth="69" fx:id="mileTextField" />

<Label text="Enter Gallons:" layoutX="20" layoutY="90" minHeight="16" minWidth="69" fx:id="gallons" />

<TextField layoutX="100" layoutY="90" minHeight="16" minWidth="69" fx:id="gallonsTextField" />

<Button layoutX="126" layoutY="120" text="Calculate" fx:id="calculate" />

<Label layoutX="100" layoutY="160" minHeight="16" minWidth="69" fx:id="gpm" />

</children>

</AnchorPane>   

FXMLDocumentController.java

package mpg;

import java.net.URL;

import java.text.DecimalFormat;

import java.util.ResourceBundle;

import javafx.event.ActionEvent;

import javafx.fxml.FXML;

import javafx.fxml.Initializable;

import javafx.scene.control.Button;

import javafx.scene.control.Label;

import javafx.scene.control.TextField;

public class FXMLDocumentController implements Initializable {

@FXML

private Label label;

@FXML

private Button button;

@FXML

private TextField mileTextField;

@FXML

private TextField gallonsTextField;

@FXML

private Label gpm;

@FXML

private void handleButtonAction(ActionEvent event) {

double miles;

double gallons;

double mpg;

miles = Double.parseDouble(mileTextField.getText());

gallons = Double.parseDouble(gallonsTextField.getText());

DecimalFormat formatter = new DecimalFormat("#0.00");

mpg = miles/gallons;

gpm.setText("Miles Per Gallon:"+formatter.format(mpg));

}

@Override

public void initialize(URL url, ResourceBundle rb) {

// TODO

}

}   

MilesPerGallon.java

package mpg;

import javafx.application.Application;

import javafx.fxml.FXMLLoader;

import javafx.scene.Parent;

import javafx.scene.Scene;

import javafx.stage.Stage;

public class MilesPerGallon extends Application {

@Override

public void start(Stage stage) throws Exception {

Parent root = FXMLLoader.load(getClass().getResource("FXMLDocument.fxml"));

Scene scene = new Scene(root);

stage.setScene(scene);

stage.show();

}

/**

* @param args the command line arguments

*/

public static void main(String[] args) {

launch(args);

}

}

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