Question

Hello, I am using IntelliJ IDEA with JavaFX to build a travel expensive calculator, but I dont konw how to conver user input to doulbe. Pleasse teach me how to add all textfield and display it after I click submit.

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{

        Label label1 = new Label ("(1) Number of days on the trip");
        Label label2 = new Label ("(2) Transportation cost (choose one only)");
        Label label3 = new Label ("Airfare Cost ");
        Label label4 = new Label ("Miles driven  ");
        Label label5 = new Label ("(3) Conference registration cost ");
        Label label6 = new Label ("(4) Lodging Cost (per night) ");
        Label label7 = new Label ("(5) Food cost (total) ");
        Label label8 = new Label ("(6) Lodging Cost (per night) ");
        Label TotalExpensive = new Label("Total expenses: ");
        Label TotalExpensiveResult = new Label(" ");



        TextField field1 = new TextField();
        TextField field2 = new TextField();
        TextField field3 = new TextField();
        TextField field4 = new TextField();
        TextField field5 = new TextField();
        TextField field6 = new TextField();
        TextField field7 = new TextField();


        Button button1 = new Button ("Submit"); //Create submit button
        Button button2 = new Button ("Cancel"); //Create Cancel button

        HBox hBox = new HBox(20, label1, field1);
        HBox hBox1 = new HBox(10, label2);
        HBox hBox2 = new HBox(15, label3, field2);
        HBox hBox3 = new HBox(10, label4, field3);
        HBox hBox4 = new HBox(12, label5, field4);
        HBox hBox5 = new HBox(32, label6, field5);
        HBox hBox6 = new HBox(75, label7, field6);
        HBox hBox7 = new HBox(32, label8, field7);
        HBox hBox8 = new HBox(20, button1, button2);
        HBox hBox9 = new HBox(20, TotalExpensive, TotalExpensiveResult);


        hBox.setAlignment(Pos.BASELINE_RIGHT);
        hBox1.setAlignment(Pos.BASELINE_LEFT);
        hBox2.setAlignment(Pos.BASELINE_RIGHT);
        hBox3.setAlignment(Pos.BASELINE_RIGHT);
        hBox4.setAlignment(Pos.BASELINE_RIGHT);
        hBox5.setAlignment(Pos.BASELINE_RIGHT);
        hBox6.setAlignment(Pos.BASELINE_RIGHT);
        hBox7.setAlignment(Pos.BASELINE_RIGHT);
        hBox8.setAlignment(Pos.CENTER);
        hBox9.setAlignment(Pos.CENTER);

        hBox.setPadding(new Insets(0,0,15,0));
        hBox3.setPadding(new Insets(0,0,15,0));
        hBox8.setPadding(new Insets(25,0,15,0));



        GridPane gridPane = new GridPane ();

        gridPane.add(hBox, 0, 0);
        gridPane.add(hBox1, 0, 1);
        gridPane.add(hBox2, 0, 2);
        gridPane.add(hBox3, 0, 3);
        gridPane.add(hBox4, 0, 4);
        gridPane.add(hBox5, 0, 5);
        gridPane.add(hBox6, 0, 6);
        gridPane.add(hBox7, 0, 7);
        gridPane.add(hBox8, 0, 8);
        gridPane.add(hBox9, 0, 9);

        //*******Here*********
        button1.setOnAction(event -> {
            double cost = field1;
            TotalExpensiveResult.setText("Total Cost: $" + cost);
        });




        gridPane.setAlignment(Pos.CENTER);
        gridPane.setPadding( new Insets(20, 20, 20, 20));
        gridPane.setVgap( 10);
        gridPane.setHgap( 10);

        primaryStage.setTitle("Travel Expenses Calculator");
        primaryStage.setScene(new Scene (gridPane));
        primaryStage.show();


    }

Answer 1

CODE

import javafx.application.Application;

import javafx.geometry.Insets;

import javafx.geometry.Pos;

import javafx.scene.Scene;

import javafx.scene.control.Button;

import javafx.scene.control.Label;

import javafx.scene.control.TextField;

import javafx.scene.layout.GridPane;

import javafx.scene.layout.HBox;

import javafx.stage.Stage;

public class Main extends Application {

@Override

public void start(Stage primaryStage) throws Exception{

Label label1 = new Label ("(1) Number of days on the trip");

Label label2 = new Label ("(2) Transportation cost (choose one only)");

Label label3 = new Label ("Airfare Cost ");

Label label4 = new Label ("Miles driven ");

Label label5 = new Label ("(3) Conference registration cost ");

Label label6 = new Label ("(4) Lodging Cost (per night) ");

Label label7 = new Label ("(5) Food cost (total) ");

Label label8 = new Label ("(6) Lodging Cost (per night) ");

Label TotalExpensive = new Label("Total expenses: ");

Label TotalExpensiveResult = new Label(" ");

TextField field1 = new TextField();

TextField field2 = new TextField();

TextField field3 = new TextField();

TextField field4 = new TextField();

TextField field5 = new TextField();

TextField field6 = new TextField();

TextField field7 = new TextField();

Button button1 = new Button ("Submit"); //Create submit button

Button button2 = new Button ("Cancel"); //Create Cancel button

HBox hBox = new HBox(20, label1, field1);

HBox hBox1 = new HBox(10, label2);

HBox hBox2 = new HBox(15, label3, field2);

HBox hBox3 = new HBox(10, label4, field3);

HBox hBox4 = new HBox(12, label5, field4);

HBox hBox5 = new HBox(32, label6, field5);

HBox hBox6 = new HBox(75, label7, field6);

HBox hBox7 = new HBox(32, label8, field7);

HBox hBox8 = new HBox(20, button1, button2);

HBox hBox9 = new HBox(20, TotalExpensive, TotalExpensiveResult);

hBox.setAlignment(Pos.BASELINE_RIGHT);

hBox1.setAlignment(Pos.BASELINE_LEFT);

hBox2.setAlignment(Pos.BASELINE_RIGHT);

hBox3.setAlignment(Pos.BASELINE_RIGHT);

hBox4.setAlignment(Pos.BASELINE_RIGHT);

hBox5.setAlignment(Pos.BASELINE_RIGHT);

hBox6.setAlignment(Pos.BASELINE_RIGHT);

hBox7.setAlignment(Pos.BASELINE_RIGHT);

hBox8.setAlignment(Pos.CENTER);

hBox9.setAlignment(Pos.CENTER);

hBox.setPadding(new Insets(0,0,15,0));

hBox3.setPadding(new Insets(0,0,15,0));

hBox8.setPadding(new Insets(25,0,15,0));

GridPane gridPane = new GridPane ();

gridPane.add(hBox, 0, 0);

gridPane.add(hBox1, 0, 1);

gridPane.add(hBox2, 0, 2);

gridPane.add(hBox3, 0, 3);

gridPane.add(hBox4, 0, 4);

gridPane.add(hBox5, 0, 5);

gridPane.add(hBox6, 0, 6);

gridPane.add(hBox7, 0, 7);

gridPane.add(hBox8, 0, 8);

gridPane.add(hBox9, 0, 9);

//*******Here*********

button1.setOnAction(event -> {

double cost = Double.parseDouble(field1.getText());

TotalExpensiveResult.setText("Total Cost: $" + cost);

});

gridPane.setAlignment(Pos.CENTER);

gridPane.setPadding( new Insets(20, 20, 20, 20));

gridPane.setVgap( 10);

gridPane.setHgap( 10);

primaryStage.setTitle("Travel Expenses Calculator");

primaryStage.setScene(new Scene(gridPane));

primaryStage.show();

}

}