Question

use this code of converting Km to miles , to create Temperature converter by using java FX

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.TextField;
import javafx.scene.control.Button;
import javafx.event.EventHandler;
import javafx.event.ActionEvent;

/**
* Kilometer Converter application
*/

public class KiloConverter extends Application
{
// Fields
private TextField kiloTextField;
private Label resultLabel;

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

@Override
public void start(Stage primaryStage)
{
// Create a Label to display a prompt.
Label promptLabel = new Label("Enter a distance in kilometers:");
  
// Create a TextField for input.
kiloTextField = new TextField();
  
// Create a Button to perform the conversion.
Button calcButton = new Button("Convert");
  
// Register the event handler.
calcButton.setOnAction(new CalcButtonHandler());
  
// Create an empty Label to display the result.
resultLabel = new Label();
  
// Put the promptLabel and the kiloTextField in an HBox.
HBox hbox = new HBox(10, promptLabel, kiloTextField);
  
// Put the HBox, calcButton, and resultLabel in a VBox.
VBox vbox = new VBox(10, hbox, calcButton, resultLabel);
  
// Set the VBox's alignment to center.
vbox.setAlignment(Pos.CENTER);
  
// Set the VBox's padding to 10 pixels.
vbox.setPadding(new Insets(10));
  
// Create a Scene.
Scene scene = new Scene(vbox);

// Add the Scene to the Stage.
primaryStage.setScene(scene);
  
// Set the stage title.
primaryStage.setTitle("Kilometer Converter");
  
// Show the window.
primaryStage.show();   
}

/*
* Event handler class for calcButton
*/
  
class CalcButtonHandler implements EventHandler<ActionEvent>
{
@Override
public void handle(ActionEvent event)
{
// Get the kilometers.
Double kilometers = Double.parseDouble(kiloTextField.getText());

// Convert the kilometers to miles.
Double miles = kilometers * 0.6214;

// Display the results.
resultLabel.setText(String.format("%,.2f miles", miles));
}
}
}

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.TextField;
import javafx.scene.control.Button;
import javafx.event.EventHandler;
import javafx.event.ActionEvent;

/**
* Temperature Converter application
*/

public class TemperatureConverter extends Application {
   // Fields
   private TextField celsiusTextField;
   private Label resultLabel;

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

   @Override
   public void start(Stage primaryStage) {
       // Create a Label to display a prompt.
       Label promptLabel = new Label("Enter a temperature in celsius degrees:");

       // Create a TextField for input.
       celsiusTextField = new TextField();

       // Create a Button to perform the conversion.
       Button calcButton = new Button("Convert");

       // Register the event handler.
       calcButton.setOnAction(new CalcButtonHandler());

       // Create an empty Label to display the result.
       resultLabel = new Label();

       // Put the promptLabel and the celsiusTextField in an HBox.
       HBox hbox = new HBox(10, promptLabel, celsiusTextField);

       // Put the HBox, calcButton, and resultLabel in a VBox.
       VBox vbox = new VBox(10, hbox, calcButton, resultLabel);

       // Set the VBox's alignment to center.
       vbox.setAlignment(Pos.CENTER);

       // Set the VBox's padding to 10 pixels.
       vbox.setPadding(new Insets(10));

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

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

       // Set the stage title.
       primaryStage.setTitle("Temperature Converter");

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

   /*
   * Event handler class for calcButton
   */

   class CalcButtonHandler implements EventHandler<ActionEvent> {
       @Override
       public void handle(ActionEvent event) {
           // Get the temperature.
           Double celsius = Double.parseDouble(celsiusTextField.getText());

           // Convert the Celsius to Fahrenheit
           Double fahrenheit = (celsius*9/5) + 32;

           // Display the results.
           resultLabel.setText(String.format("%,.2f F", fahrenheit));
       }
   }
}

OUTPUT-

Temperature Converter - 0 x Enter a temperature in celsius degrees: 12 Convert 53.60 F