Calculator

package application;

import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.event.ActionEvent;
import javafx.event.Event;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.FlowPane;


public class My_Calculator extends Application {
    @Override


    public void start(Stage primaryStage) {



        FlowPane pane = new FlowPane();
        pane.setAlignment(Pos.CENTER);
        pane.setPadding(new Insets ( 30 , 20 , 30 , 20));
        pane.setHgap(5);
        pane.setVgap(5);
        pane.setMinWidth(220);
        pane.setPrefWidth(220);
        pane.setMaxWidth(220);;

        TextField Result = new TextField();
        Result.setEditable(false);              //Don't allow the TextField to be editable.
        Result.setAlignment(Pos.CENTER_RIGHT);
        Result.setMinSize(210, 30);

        pane.getChildren().add(Result);




        Button siete = new Button("7");
        Button ocho = new Button("8");
        Button nueve = new Button("9");
        Button mas = new Button("+");

        siete.setMinSize(40, 40);
        ocho.setMinSize(40, 40);
        nueve.setMinSize(40, 40);
        mas.setMinSize(40, 40);

        pane.getChildren().add(siete);
        pane.getChildren().add(ocho);
        pane.getChildren().add(nueve);
        pane.getChildren().add(mas);



        //Create next row

        Button cuatro = new Button("4");
        Button cinco = new Button("5");
        Button seis = new Button("6");
        Button menos = new Button("-");

        cuatro.setMinSize(40, 40);
        cinco.setMinSize(40, 40);
        seis.setMinSize(40, 40);
        menos.setMinSize(40, 40);

        pane.getChildren().add(cuatro);
        pane.getChildren().add(cinco);
        pane.getChildren().add(seis);
        pane.getChildren().add(menos);



        //Create next row


        Button uno = new Button("1");
        Button dos = new Button("2");
        Button tres = new Button("3");
        Button multiplicar = new Button("*");

        uno.setMinSize(40, 40);
        dos.setMinSize(40, 40);
        tres.setMinSize(40, 40);
        multiplicar.setMinSize(40, 40);

        pane.getChildren().add(uno);
        pane.getChildren().add(dos);
        pane.getChildren().add(tres);
        pane.getChildren().add(multiplicar);

        //Final Row

        Button zero = new Button("0");
        Button igual = new Button("=");
        Button dividir = new Button("/");
        Button C = new Button ("C");

        zero.setMinSize(40, 40);
        igual.setMinSize(40, 40);
        dividir.setMinSize(40, 40);
        C.setMinSize(40, 40);

        pane.getChildren().add(zero);
        pane.getChildren().add(C);
        pane.getChildren().add(igual);
        pane.getChildren().add(dividir);




      //Create event handler
        @SuppressWarnings("rawtypes")
        EventHandler handle = new EventHandler() {
            @Override
            public void handle(Event event)
            {
                Button tempButton = ((Button) event.getSource());//Get the Button that is being pressed



                String currentButtonPress = tempButton.getText();//Get the text of the button that is being pressed
                String tempString = null;
                int tempInt = 0;
                int tempInt2 = 0;
                int sum= 0;

                //Depending on the Button text do some action
                switch (currentButtonPress) {
                    case "=":
                        tempString = Result.getText();
                        tempInt2 = Integer.parseInt(tempString);
                        sum = tempInt+tempInt2;

                        tempString = String.valueOf(sum);
                        Result.appendText(tempString);
                        break;
                    case "+":
                        tempString = Result.getText();
                        System.out.println(tempString);
                        tempInt = Integer.parseInt(tempString);
                        Result.clear();

                        break;
                    case "C":
                        Result.clear();
                        Result.setText("0");
                    default:
                        Result.appendText(currentButtonPress);
                }



            }

        };


      //Set buttons' handlers;
        uno.setOnAction(handle);
        dos.setOnAction(handle);
        tres.setOnAction(handle);
        cuatro.setOnAction(handle);
        cinco.setOnAction(handle);
        seis.setOnAction(handle);
        siete.setOnAction(handle);
        ocho.setOnAction(handle);
        nueve.setOnAction(handle);
        menos.setOnAction(handle);
        mas.setOnAction(handle);
        multiplicar.setOnAction(handle);
        dividir.setOnAction(handle);
        igual.setOnAction(handle);
        C.setOnAction(handle);




       // Show Scene

        Scene scene = new Scene(pane);
        primaryStage.setTitle("Calc.");
        primaryStage.setScene(scene);
        primaryStage.show();



    }





    public static void main(String[] args) {
        launch(args);
    }
}