MUST USE JAVAFX FOR THIS PROGRAM Create a application that acts as a simple calculator. Create buttons...

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MUST USE JAVAFX FOR THIS PROGRAM Create a application that acts as a simple calculator. Create buttons...

MUST USE JAVAFX FOR THIS PROGRAM

Create a application that acts as a simple calculator. Create buttons for 0-9 and a text field that displays the concatenation of the current digits as they are clicked. Add buttons for operators “+”, “-“, “*”, and “/”. Add a final button for “=” that calculates the computed value with the value entered in the text field. For instance, clicking buttons 7, +, 8, = one-by-one, then it should display 15.

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Answer 1

Answer #1

SimpleCalculatorFXMLController.java

import java.net.URL;
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.TextField;

public class SimpleCalculatorFXMLController implements Initializable {

@FXML private TextField resultField;
@FXML private Button btnOne;
@FXML private Button btnTwo;
@FXML private Button btnThree;
@FXML private Button btnFour;
@FXML private Button btnFive;
@FXML private Button btnSix;
@FXML private Button btnSeven;
@FXML private Button btnEight;
@FXML private Button btnNine;
@FXML private Button btnZero;
@FXML private Button btnEqual;
@FXML private Button btnClear;
@FXML private Button btnAdd;
@FXML private Button btnSub;
@FXML private Button btnMult;
@FXML private Button btnDiv;

private Float data = 0f;
private int operation = -1;

@FXML
private void handleActions(ActionEvent event)
{
if(event.getSource() == btnOne)
{
resultField.setText(resultField.getText() + "1");
}
else if(event.getSource() == btnTwo)
{
resultField.setText(resultField.getText() + "2");
}
else if(event.getSource() == btnThree)
{
resultField.setText(resultField.getText() + "3");
}
else if(event.getSource() == btnFour)
{
resultField.setText(resultField.getText() + "4");
}
else if(event.getSource() == btnFive)
{
resultField.setText(resultField.getText() + "5");
}
else if(event.getSource() == btnSix)
{
resultField.setText(resultField.getText() + "6");
}
else if(event.getSource() == btnSeven)
{
resultField.setText(resultField.getText() + "7");
}
else if(event.getSource() == btnEight)
{
resultField.setText(resultField.getText() + "8");
}
else if(event.getSource() == btnNine)
{
resultField.setText(resultField.getText() + "9");
}
else if(event.getSource() == btnZero)
{
resultField.setText(resultField.getText() + "0");
}
else if(event.getSource() == btnClear)
{
resultField.setText("");
}
else if(event.getSource() == btnAdd)
{
data = Float.parseFloat(resultField.getText());
operation = 1; // Add
resultField.setText("");
}
else if(event.getSource() == btnSub)
{
data = Float.parseFloat(resultField.getText());
operation = 2; // Subtract
resultField.setText("");
}
else if(event.getSource() == btnMult)
{
data = Float.parseFloat(resultField.getText());
operation = 3; // Multiply
resultField.setText("");
}
else if(event.getSource() == btnDiv)
{
data = Float.parseFloat(resultField.getText());
operation = 4; // Divide
resultField.setText("");
}
else if(event.getSource() == btnEqual)
{
Float secondNumber = Float.parseFloat(resultField.getText());
switch(operation)
{
case 1:
Float sum = data + secondNumber;
resultField.setText(String.valueOf(sum));
break;

case 2:
Float diff = data - secondNumber;
resultField.setText(String.valueOf(diff));
break;

case 3:
Float prod = data * secondNumber;
resultField.setText(String.valueOf(prod));
break;

case 4:
Float quot = 0f;
try
{
quot = data / secondNumber;
}catch(Exception e){
resultField.setText("Error!");
}
resultField.setText(String.valueOf(quot));
break;
}
}
}

@Override
public void initialize(URL url, ResourceBundle rb) {
// TODO
}

}

SimpleCalculatorFXML.fxml

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

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>

SimpleCalculator.java (Main class)

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class SimpleCalculator extends Application {

@Override
public void start(Stage stage) throws Exception {
Parent root = FXMLLoader.load(getClass().getResource("SimpleCalculatorFXML.fxml"));

Scene scene = new Scene(root);

stage.setScene(scene);
stage.setTitle("Simple Calculator");
stage.show();
}

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}

}

****************************************************************** SCREENSHOT *********************************************************

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MUST USE JAVAFX FOR THIS PROGRAM Create a application that acts as a simple calculator. Create buttons...

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