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Is it possible to embed an external program in JavaFX?

I'm currently developing a JavaFX desktop application that will take the place of an existing browser based application.
This new application have the option of launching external applications made in swing.
I'm now wondering if there's any chance of launching these external applications inside the existing JavaFX application?
In other words, is there a way to embed external applications in JavaFX?

Do you mean something like this?
JavaFX:
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.stage.Stage;
public class Main extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage stage) {
Button fxButton = new Button("javafx button");
fxButton.setOnAction(event -> new SwingTest());
Scene scene = new Scene(fxButton, 600, 400);
stage.setScene(scene);
stage.show();
}
}
Swing:
import javax.swing.JFrame;
import javax.swing.WindowConstants;
import java.awt.Button;
public class SwingTest extends JFrame {
SwingTest() {
Button swingButton = new Button("swing button");
getContentPane().add(swingButton);
setSize(600, 600);
setVisible(true);
}
}

Creating a Calendar using javafx

I am a little stumped on how to get started on this project I have in front of me. I simply need to create a calendar on a javafx stage for the current date with two simple next / prior buttons to go between months.
So far I have just created the minimum, a blank stage to appear.
public class Calendar extends Application{
#Override
public void start(Stage primaryStage) throws Exception {
primaryStage.setTitle("Java Calendar");
Pane base = new Pane();
Scene scene = new Scene(base, 500, 300);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args){
Application.launch(args);
}
}
I had noticed under java documentation that there is a calendar class under java.util, however the documentation was rather confusing to me on how to implement it. Basically I want to ask, what is the best way to approach this? Would you be able to show me through the basics of how this or another Calendar class works? Or would I be best off using a grid pane, and switch between what scene is shown on the stage when I click the next or prior button?
Thank you so much for your time.

Try This
import java.time.LocalDate;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.DatePicker;
import javafx.scene.control.Label;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
public class Main extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage stage) {
VBox vbox = new VBox(20);
Scene scene = new Scene(vbox, 400, 400);
stage.setScene(scene);
DatePicker startDatePicker = new DatePicker();
DatePicker endDatePicker = new DatePicker();
startDatePicker.setValue(LocalDate.now());
endDatePicker.setValue(startDatePicker.getValue().plusDays(1));
vbox.getChildren().add(new Label("Start Date:"));
vbox.getChildren().add(startDatePicker);
vbox.getChildren().add(new Label("End Date:"));
vbox.getChildren().add(endDatePicker);
stage.show();
}
}

Eclipse doesn't want to run simple JavaFX application

I have other classes named Test in other packages and one class with the same name in the default package.
When I click the Run button in Eclipse, instead of running this class, it runs another Test class from inside another package instead:
package jfx;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
public class Test extends Application {
public void start(Stage stage) {
Circle circ = new Circle(40, 40, 30);
Group root = new Group(circ);
Scene scene = new Scene(root, 400, 300);
stage.setTitle("My JavaFX Application");
stage.setScene(scene);
stage.show();
}
}
How can I fix this?

Add a main method to allow Eclipse recognize the program as runnable application
public static void main(String[] args) {
Application.launch(args);
}

MiGLayout sizing not working properly in JavaFX

Here's my snippet:
package javafxdemo;
import org.tbee.javafx.scene.layout.MigPane;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.stage.Stage;
public class FXDemo extends Application {
#Override
public void start (Stage stage) throws Exception {
MigPane root = new MigPane();
Scene scene = new Scene(root);
Button b = new Button("Hello");
root.getChildren().add(b);
stage.setScene(scene);
stage.setTitle("FX");
stage.show();
}
public static void main (String[] args) {
launch (args);
}
}
When running the gui doesn't show properly: the frame size is smaller than the button. Why does it happens? In HBox Layout when setting the scene it is automatically resized, so why with MiGLayout it doesn't work?
I'm using MigLayout 4.3

So, I filed an issue and later found out a workaround for this:
just add stage.sizeToScene() after stage.show().

java and javafx integrated programs

I have developed a desktop database application. But the interface is not rich. So I want integrate javafx interface in my code. But I am new to javafx, please give examples or tutorials for java and javafx integrated programs. I search in javafx site and some other books but I didn't get the java and javafx combined code.
Give me a code that replace Jbutton by javafx button.
import javax.swing.*;
class Javabutton extends JFrame
{
JButton b;
Container con;
Javabutton()
{
b=JButton("hello");
setLayout(new FlowLayout());
setSize(400,500);
con=getContentPane();
con.add(b);
setVisible(true);
}
public static void main(String args[])
{
new Javabutton();
}
}
`

You need to use JFXPanel, see http://docs.oracle.com/javafx/2.0/swing/jfxpub-swing.htm

It's better to write pure javaFX code other than using JFX with swing.
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.stage.Stage;
public class Hello extends Application
{
public static void main(String[] args)
{
Application.launch(args);
}
#Override
public void start(Stage primaryStage)
{
primaryStage.setTitle("Button");
Group root = new Group();
Scene scene = new Scene(root, 300, 250);
Button btn = new Button();
btn.setLayoutX(100);
btn.setLayoutY(80);
btn.setText("OK");
btn.setOnAction(new EventHandler<ActionEvent>()
{
public void handle(ActionEvent event)
{
System.out.println("Hello World");
}
});
root.getChildren().add(btn);
primaryStage.setScene(scene);
primaryStage.show();
}
}