Question

Write a program that allows a user to view a table of temperature conversion. The user should be able to enter a starting value and an ending value in to textboxes. Your program will display a list of temperature conversion from Celsius to Fahrenheit in a text area like the example below: You can choose any color, design and font for this interface. Use javafx scene builder for program. When you click on "Display" button it read values from text boxes in Celsius and converts them into Fahrenheit and display in text area. The "Clear" button resets the screen by clearing all text components from text boxes and text area. The "Exit" button exits the program.

Answer 1

MAIN.java

import java.io.IOException;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.TilePane;
import javafx.stage.Stage;

public class MAIN extends Application {

@Override
public void start(Stage primaryStage) {
try {
Pane mainPane =(Pane) FXMLLoader.load(MAIN.class.getResource("Sample.fxml"));
primaryStage.setScene(new Scene(mainPane));
primaryStage.show();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

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

Controller.java

import java.net.URL;
import java.util.ArrayList;
import java.util.ResourceBundle;

import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.ListView;
import javafx.scene.control.TextField;
import javafx.stage.Stage;

public class Controller {

@FXML
private ResourceBundle resources;

@FXML
private URL location;

@FXML
private Button clrBtn;

@FXML
private Button disButton;

@FXML
private TextField endField;

@FXML
private Button exitBtn;

@FXML
private ListView<String> listView;

@FXML
private TextField startField;

@FXML
void clear(ActionEvent event) {
ObservableList<String> list=FXCollections.observableArrayList();
listView.setItems(list);
}

@FXML
void close(ActionEvent event) {
// get a handle to the stage
// do what you have to do
Stage stage = (Stage) exitBtn.getScene().getWindow();
stage.close();
}

@FXML
void display(ActionEvent event) {

double start=Double.parseDouble(startField.getText());
double end=Double.parseDouble(endField.getText());

ObservableList<String> list=FXCollections.observableArrayList();
list.add("Celsius\t\tFahrenheit");
list.add("-------------------------------------");
for(;start<end;start++){
double Fahrenheit = (9/5) * start + 32;
String temp = start + "\t\t" +Fahrenheit;
list.add(temp);
}
listView.setItems(list);

}

@FXML
void initialize() {
assert clrBtn != null : "fx:id=\"clrBtn\" was not injected: check your FXML file 'Sample.fxml'.";
assert disButton != null : "fx:id=\"disButton\" was not injected: check your FXML file 'Sample.fxml'.";
assert endField != null : "fx:id=\"endField\" was not injected: check your FXML file 'Sample.fxml'.";
assert exitBtn != null : "fx:id=\"exitBtn\" was not injected: check your FXML file 'Sample.fxml'.";
assert listView != null : "fx:id=\"listView\" was not injected: check your FXML file 'Sample.fxml'.";
assert startField != null : "fx:id=\"startField\" was not injected: check your FXML file 'Sample.fxml'.";

}

}

Sample.fxml

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

<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.paint.*?>

<AnchorPane id="AnchorPane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="502.0" prefWidth="338.9998779296875" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="Controller">
<children>
<Label layoutX="19.0" layoutY="81.0" text="Enter Start Value" />
<Label layoutX="19.0" layoutY="143.0" text="Enter End Value" />
<TextField fx:id="startField" layoutX="125.0" layoutY="78.0" prefWidth="200.0" />
<TextField fx:id="endField" layoutX="125.0" layoutY="140.0" prefWidth="200.0" />
<ListView fx:id="listView" layoutX="19.0" layoutY="182.0" prefHeight="200.0" prefWidth="306.0" />
<Button fx:id="disButton" layoutX="19.0" layoutY="438.0" mnemonicParsing="false" onAction="#display" text="Display" />
<Button fx:id="clrBtn" layoutX="132.0" layoutY="438.0" mnemonicParsing="false" onAction="#clear" text="Clear" />
<Button fx:id="exitBtn" layoutX="255.0" layoutY="438.0" mnemonicParsing="false" onAction="#close" text="Exit" />
</children>
</AnchorPane>

Output:

- O X Enter Start Value 3 Enter End Value 11 Celsius 5.0 6.0 Fahrenheit 35.0 36.0 37.0 38.0 39.0 40.0 41.0 420 9.0 100 | Disp