Question

Write a program using JAVAFX that collects: a) hourly rate of pay in a textbox; b) hours worked in a textbox; c) a radio button indicating weekly or bi-weekly (never both); and d) a button labelled Net Pay. Using the information in these fields, calculate and display in appropriate non-editable text boxes: i) Gross pay (hours x rate); ii) Canada Pension Plan (4% of gross pay over $65 per week); iii) Employment Insurance (2% of gross pay); iv) income tax (20% of gross pay over $230 per week); and finally v) Net Pay. Design the  interface to be neat and professional.

Test the program with the following numbers: a) 42 hours @ $22.50/hr - for two weeks

b) 24 hours @ $14.75/hr - for one week

c) 86 hours @ $32.00/hr – for two weeks

d) 34 hours @ $21.80/hr – for one week

ONLY JAVAFX TO BE USED.

Answer 1

import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.geometry.Pos;
import javafx.geometry.Insets;
import javafx.scene.control.Label;
import javafx.scene.control.RadioButton;
import javafx.scene.control.TextField;
import javafx.scene.control.ToggleGroup;
import javafx.scene.control.Button;
import javafx.event.EventHandler;
import javafx.event.ActionEvent;
import javafx.event.Event;
import javafx.scene.layout.FlowPane;

public class Payment extends Application {

   // Fields
   private TextField hourlyPayTextField;
   private TextField hoursWorkedTextField;
   private TextField grossPayTextField;
   private TextField canadaPensionTextField;
   private TextField insuranceTextField;
   private TextField taxTextField;
   private TextField netPayTextField;
   private Label hourlyPayLabel, hoursWorkedLabel, grossPayLabel, canadaPensionLabel, insuranceLabel, taxLabel,
           netPayLabel;
   private RadioButton weeklyButton, biWeeklyButton;

   public static void main(String[] args) {
       // Launch the application.
       launch(args);
   }

   @Override
   public void start(Stage primaryStage) {
       // Create labels to display a prompt.
       hourlyPayLabel = new Label("Enter Hourly Pay:");
       hoursWorkedLabel = new Label("Enter Hourly Worked:");
       grossPayLabel = new Label("Gross Pay:");
       canadaPensionLabel = new Label("Canada Pension Plan:");
       insuranceLabel = new Label("Employment Insurance:");
       taxLabel = new Label("Income tax:");
       netPayLabel = new Label("Net Pay:");

       // Create TextFields for input.
       hourlyPayTextField = new TextField();
       hoursWorkedTextField = new TextField();
       grossPayTextField = new TextField();
       canadaPensionTextField = new TextField();
       insuranceTextField = new TextField();
       taxTextField = new TextField();
       netPayTextField = new TextField();

       // Disable resultant textfield
       grossPayTextField.setDisable(true);
       canadaPensionTextField.setDisable(true);
       insuranceTextField.setDisable(true);
       taxTextField.setDisable(true);
       netPayTextField.setDisable(true);

       // radio buttons
       weeklyButton = new RadioButton("Weekly");
       weeklyButton.setSelected(true);
       biWeeklyButton = new RadioButton("Bi-weekly");

       // Add radio buttons to a toggle group so that only one can be selected
       ToggleGroup positionButtonGroup = new ToggleGroup();
       weeklyButton.setToggleGroup(positionButtonGroup);
       biWeeklyButton.setToggleGroup(positionButtonGroup);

       // Create a Button to perform the calculation.
       Button calcButton = new Button("Net Pay");
       // Register the event handler.
       calcButton.setOnAction(new CalcButtonHandler());

       // Put the labels in a VBox.
       VBox vbox1 = new VBox();
       vbox1.getChildren().addAll(hourlyPayLabel, hoursWorkedLabel, weeklyButton, grossPayLabel, canadaPensionLabel,
               insuranceLabel, taxLabel, netPayLabel);
       vbox1.setAlignment(Pos.CENTER);
       Insets insets = new Insets(8, 10, 10, 10);
       VBox.setMargin(hourlyPayLabel, insets);
       VBox.setMargin(hoursWorkedLabel, insets);
       VBox.setMargin(weeklyButton, insets);
       VBox.setMargin(grossPayLabel, insets);
       VBox.setMargin(canadaPensionLabel, insets);
       VBox.setMargin(insuranceLabel, insets);
       VBox.setMargin(taxLabel, insets);
       VBox.setMargin(netPayLabel, insets);

       // Put the text fields in a VBox.
       VBox vbox2 = new VBox();
       vbox2.getChildren().addAll(hourlyPayTextField, hoursWorkedTextField, biWeeklyButton, grossPayTextField,
               canadaPensionTextField, insuranceTextField, taxTextField, netPayTextField);
       vbox2.setAlignment(Pos.CENTER);
       insets = new Insets(5, 10, 5, 10);
       VBox.setMargin(hourlyPayTextField, insets);
       VBox.setMargin(hoursWorkedTextField, insets);
       VBox.setMargin(biWeeklyButton, insets);
       VBox.setMargin(grossPayTextField, insets);
       VBox.setMargin(canadaPensionTextField, insets);
       VBox.setMargin(insuranceTextField, insets);
       VBox.setMargin(taxTextField, insets);
       VBox.setMargin(netPayTextField, insets);

       // Put the button in a HBox
       HBox hboxButton = new HBox();
       hboxButton.getChildren().add(calcButton);
       hboxButton.setAlignment(Pos.CENTER);
       insets = new Insets(15, 55, 15, 15);
       HBox.setMargin(calcButton, insets);

       // Put label and text field panel to a HBox
       HBox hbox = new HBox();
       hbox.getChildren().addAll(vbox1, vbox2);
       hbox.setAlignment(Pos.CENTER);

       insets = new Insets(10, 10, 10, 10);
       HBox.setMargin(vbox1, insets);
       HBox.setMargin(vbox2, insets);

       // Create a FlowPane and add hbox and button to it
       FlowPane pane = new FlowPane();
       pane.getChildren().addAll(hbox, hboxButton);
       insets = new Insets(10, 10, 10, 10);
       FlowPane.setMargin(hbox, insets);
       FlowPane.setMargin(hboxButton, insets);

       // Create a Scene.
       Scene scene = new Scene(pane);

       // Add the Scene to the Stage.
       primaryStage.setScene(scene);

       // Set the stage title.
       primaryStage.setTitle("Calculate Net Pay");

       // Show the window.
       primaryStage.show();
   }

   /*
   * Event handler class for calcButton
   */

   class CalcButtonHandler implements EventHandler<ActionEvent> {
       @Override
       public void handle(ActionEvent event) {
           // Get the hourlypay and hoursWorked from text fields
           double hourlyPay = Double.parseDouble(hourlyPayTextField.getText());
           double hoursWorked = Double.parseDouble(hoursWorkedTextField.getText());

           // Calculate weekly grossPay
           double grossPay = hourlyPay * hoursWorked;
           double tax = 0;
           double canada = 0;

           // Calculate canada pension and tax
           if (grossPay > 65) {
               canada = (grossPay - 65) * 4 / 100;
           }

           if (grossPay > 230) {
               tax = (grossPay - 230) * 20 / 100;
           }

           // If bi-weekly button is selected
           // double gross, canada and tax
           if (biWeeklyButton.isSelected()) {
               grossPay *= 2;
               canada *= 2;
               tax *= 2;
           }

           // Calculate insurace and netPay
           double insurance = grossPay * 2 / 100;
           double netPay = grossPay - (canada + insurance + tax);

           // Display the results.
           grossPayTextField.setText(String.format("%,.2f", grossPay));
           canadaPensionTextField.setText(String.format("%,.2f", canada));
           insuranceTextField.setText(String.format("%,.2f", insurance));
           taxTextField.setText(String.format("%,.2f", tax));
           netPayTextField.setText(String.format("%,.2f", netPay));
       }
   }
}

OUTPUT