import javafx.scene.control.Button;

import javafx.scene.control.Label;

import javafx.scene.control.RadioButton;

import javafx.scene.layout.HBox;

import javafx.scene.layout.VBox;

import javafx.application.Application;

import javafx.scene.Scene;

import javafx.scene.layout.BorderPane;

import javafx.stage.Stage;

import javafx.scene.control.TextField;

import javafx.event.ActionEvent;

import javafx.event.EventHandler;

public class Calculate extends Application{

private BorderPane pane = new BorderPane();

private Button CalculateBtn = new Button("Calculate");

private Label operator = new Label("");

private RadioButton multiplyBtn= new RadioButton("Multiply");

private RadioButton divideBtn = new RadioButton("Divide");

private Label result = new Label("");

private TextField num1 = new TextField();

private TextField num2 = new TextField();

private VBox paneforOperators = new VBox();

private HBox paneForTextFields = new HBox();

public static void main(String[] args) {

launch(args);

}

public void setupLambda() {

multiplyBtn.setOnAction(e -> {

operator.setText("*");

});

divideBtn.setOnAction(e -> {

operator.setText("/");

});

}

@Override

public void start(Stage primaryStage) {

pane.setTop(CalculateBtn);

pane.setLeft(result);

paneforOperators.getChildren().addAll(multiplyBtn, divideBtn);

//pane.setCenter(num2);

pane.setRight(paneforOperators);

paneForTextFields.getChildren().addAll(num1, operator, num2);

pane.setBottom(paneForTextFields);

setupLambda();

Scene scene = new Scene(pane, 300, 250);

primaryStage.setTitle("Calculator");

primaryStage.setScene(scene);

primaryStage.show();

}

class CalculateHandler implements EventHandler<ActionEvent> {

@Override

public void handle(ActionEvent e) {

double resultValue = 0;

if (e.getSource() == CalculateBtn) {

if (multiplyBtn.isSelected()) {

resultValue= Double.parseDouble(num1.getText()) * Double.parseDouble(num2.getText());

result.setText(String.valueOf(resultValue));

}

else if (divideBtn.isSelected()) {

if( Double.parseDouble(num2.getText()) != 0){

resultValue = Double.parseDouble(num1.getText()) / Double.parseDouble(num2.getText());

result.setText(String.valueOf(resultValue));

}

else{

result.setText("Cannot divide by zero");

}

}

}

}

}

}