Convert from swing to JavaFX?

2020-08-24 • Java

When converting a swing project to a JavaFX project, which classes in JavaFX match the swing class?

1 - 1 is the best

I'm not looking for integration with swing, but a complete transformation

Solution

Here are some basic classes:

>Swing – > JavaFX > JFrame – > Application and implementation stage (if you extend JFrame in the main class, you can use application. Launch() to start the one that extends application) Stage is an explicit JavaFX, which is necessary to create a window You will need to use an instance of it, not an instance of JFrame. > JPanel – > scene & pane (the scene matches JPanel, but your class should expand the pane. Then build a scene from the pane. The pane is the layout in JavaFX) > JButton – > keys > jlabel – > labels > in many cases, Deleting J will work... > joptionpane – > conversation (but not always) > actionlistener – > event handler < ActionEvent >) (you need to create a new method / class in JavaFX for each action you need, which is exactly the same as a method of swing)

Swing example (the basic interface of the game I made)

public class Interface extends JFrame {

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

private cardlayout layout;
private JPanel manager;
private Introduction start;
private MainDisplay display;

public Interface() {
    super("Demo");
    this.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
    this.setMinimumSize(new Dimension(750,500));
    this.setPreferredSize(new Dimension(750,500));
    this.setMaximumSize(new Dimension(750,500));

    setUp();

    this.pack();
    this.setVisible(true);
}

private void setUp() {
    layout = new cardlayout();
    manager = new JPanel(layout);
    this.add(manager);

    start = new Introduction();
    manager.add(start,INTRODUCTION);

    display = new MainDisplay();
    manager.add(display);

    layout.show(manager);
}

public class Introduction extends JPanel implements ActionListener {

    private static final int LOAD = 0;
    private static final int SAVE = 1;
    private JButton start;
    private JButton toGame;
    private JButton load;
    private JButton save;
    private JButton exit;

    public Introduction() {
        setUp();
    }

    private void setUp() {
        SpringLayout manager = new SpringLayout();
        this.setLayout(manager);

        JLabel title = new JLabel("Demo");
        title.setFont(new Font(Font.SERIF,Font.BOLD,60));
        manager.putConstraint(SpringLayout.HORIZONTAL_CENTER,title,SpringLayout.HORIZONTAL_CENTER,this);
        manager.putConstraint(SpringLayout.NORTH,10,SpringLayout.NORTH,this);
        this.add(title);

        start = new JButton("New Game");
        start.setFont(new Font(Font.SERIF,Font.PLAIN,16));
        start.addActionListener(this);
        manager.putConstraint(SpringLayout.HORIZONTAL_CENTER,start,-250,50,SpringLayout.soUTH,title);
        this.add(start);

        toGame = new JButton("Continue");
        toGame.setFont(new Font(Font.SERIF,16));
        toGame.addActionListener(this);
        toGame.setEnabled(false);
        manager.putConstraint(SpringLayout.HORIZONTAL_CENTER,toGame,start);
        this.add(toGame);

        load = new JButton("Load Game");
        load.setFont(new Font(Font.SERIF,16));
        load.addActionListener(this);
        manager.putConstraint(SpringLayout.HORIZONTAL_CENTER,load,toGame);
        this.add(load);

        save = new JButton("Save Game");
        save.setFont(new Font(Font.SERIF,16));
        save.addActionListener(this);
        save.setEnabled(false);
        manager.putConstraint(SpringLayout.HORIZONTAL_CENTER,save,load);
        this.add(save);

        exit = new JButton("Exit Game");
        exit.setFont(new Font(Font.SERIF,16));
        exit.setToolTipText("Saves the current game,and exits the program.");
        exit.addActionListener(this);
        manager.putConstraint(SpringLayout.HORIZONTAL_CENTER,exit,save);
        this.add(exit);
    }

    private void perform(int option) {
        JFileChooser chooser = new JFileChooser();
        chooser.setFileFilter(new TextFileFilter());
        if (option == LOAD) {
            int choice = chooser.showDialog(this,"Load Game");
            if (choice == JFileChooser.APPROVE_OPTION)
                chooser.getSelectedFile();
        } else if (option == SAVE) {
            int choice = chooser.showDialog(this,"Save Game");
            if (choice == JFileChooser.APPROVE_OPTION)
                chooser.getSelectedFile();
        }
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if (display.isRunning()) {
            if (e.getSource() == start || e.getSource() == load) {
                String verify = "A game is currently running.  Are you sure you want to start a new game?"
                        + "\r\nAny prevIoUs game data will be deleted.";
                int choice = JOptionPane.showConfirmDialog(this,verify,"New Game - Warning",JOptionPane.YES_NO_OPTION,JOptionPane.WARNING_MESSAGE);

                if (choice == JOptionPane.NO_OPTION)
                    return;
            }
        }

        if (e.getSource() == start) {
            display.start();
            layout.show(manager,MAIN_DISPLAY);
            toGame.setEnabled(true);
            save.setEnabled(true);
        } else if (e.getSource() == toGame)
            layout.show(manager,MAIN_DISPLAY);
        else if (e.getSource() == load)
            perform(LOAD);
        else if (e.getSource() == save)
            perform(SAVE);
        else if (e.getSource() == exit) {
            perform(SAVE);
            Interface.this.setVisible(false);
            Interface.this.dispose();
        }
    }

}

public class MainDisplay extends JPanel implements ActionListener {

    private static final long serialVersionUID = 1L;
    private boolean running;
    private JButton overview;
    private JButton map;
    private JButton ranking;
    private JButton reports;
    private JButton home;

    public MainDisplay() {
        running = false;
        setUp();
    }

    public boolean isRunning() {
        return running;
    }

    private void setUp() {
        SpringLayout manager = new SpringLayout();
        this.setLayout(manager);

        ranking = new JButton("Ranking");
        ranking.setFont(new Font(Font.SERIF,10));
        ranking.addActionListener(this);
        manager.putConstraint(SpringLayout.HORIZONTAL_CENTER,ranking,this);
        this.add(ranking);

        map = new JButton("Map");
        map.setFont(new Font(Font.SERIF,10));
        map.addActionListener(this);
        manager.putConstraint(SpringLayout.EAST,map,-10,SpringLayout.WEST,ranking);
        manager.putConstraint(SpringLayout.NORTH,this);
        this.add(map);

        overview = new JButton("Overview");
        overview.setFont(new Font(Font.SERIF,10));
        overview.addActionListener(this);
        manager.putConstraint(SpringLayout.EAST,overview,map);
        manager.putConstraint(SpringLayout.NORTH,this);
        this.add(overview);

        reports = new JButton("Reports");
        reports.setFont(new Font(Font.SERIF,10));
        reports.addActionListener(this);
        manager.putConstraint(SpringLayout.WEST,reports,SpringLayout.EAST,this);
        this.add(reports);

        home = new JButton("Home");
        home.setFont(new Font(Font.SERIF,10));
        home.addActionListener(this);
        manager.putConstraint(SpringLayout.WEST,home,reports);
        manager.putConstraint(SpringLayout.NORTH,this);
        this.add(home);
    }

    public void start() {
        running = true;
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == home) {
            layout.show(manager,INTRODUCTION);
        }
    }

}

public static final class TextFileFilter extends FileFilter {

    private static final String FILE_EXTENSION = "tra";

    @Override
    public boolean accept(File f) {
        if (f.isDirectory())
            return true;
        if (f.getName().toLowerCase().endsWith(FILE_EXTENSION))
            return true;
        return false;
    }

    @Override
    public String getDescription() {
        return "Demo";
    }
}

}

JavaFX example (almost the same as the example in JavaFX)

public class Interface extends Application {

public static void main(String[] args) {
    Application.launch(Interface.class,args);
}

private static final int WIDTH = 750;
private static final int HEIGHT = 500;
private static Stage stage;
private static Introduction start;
private static MainDisplay display;
private static Scene startScene;
private static Scene displayScene;

public Interface() {
    start = new Introduction();
    display = new MainDisplay();
    startScene = new Scene(start,WIDTH,HEIGHT);
    displayScene = new Scene(display,HEIGHT);
}

@Override
public void start(Stage primaryStage) throws Exception {
    Interface.stage = primaryStage;

    stage.setTitle(Constants.TITLE);
    stage.setResizable(false);
    stage.setWidth(WIDTH);
    stage.setHeight(HEIGHT);

    stage.setScene(startScene);
    stage.show();
}

public class Introduction extends BorderPane {

    private static final int LOAD = 0;
    private static final int SAVE = 1;
    private Button toGame;
    private Button save;
    public Introduction() {
        setUp();
    }

    private void setUp() {

        this.setBackground(
                new Background(new BackgroundFill(Color.BLACK,null,null)));

        V@R_37_2419@ menu = new V@R_37_2419@();
        menu.setSpacing(10);

        Label title = new Label(Constants.TITLE.toUpperCase());
        title.setFont(Font.font("Arial",FontWeight.THIN,60));
        title.setTextFill(Color.RED);
        menu.getChildren().add(title);

        int btnWidth = 300;
        Background menuBkg = new Background(new BackgroundFill(null,null));
        Border menuBorder = new Border(new Borderstroke(Color.RED,BorderstrokeStyle.soLID,new CornerRadii(10),null));

        Button start = new Button(Constants.START.toUpperCase());
        start.setFont(Font.font("Times New Roman",16));
        start.setTextFill(Color.WHITE);
        start.setPrefWidth(btnWidth);
        start.setBackground(menuBkg);
        start.setBorder(menuBorder);
        start.setOnAction(new StartHandler());

        toGame = new Button(Constants.CONTINUE.toUpperCase());
        toGame.setFont(Font.font("Times New Roman",16));
        toGame.setTextFill(Color.WHITE);
        toGame.setPrefWidth(btnWidth);
        toGame.setBackground(menuBkg);
        toGame.setBorder(menuBorder);
        toGame.setDisable(true);
        toGame.setOnAction(new ContinueHandler());

        Button load = new Button(Constants.LOAD.toUpperCase());
        load.setFont(Font.font("Times New Roman",16));
        load.setTextFill(Color.WHITE);
        load.setPrefWidth(btnWidth);
        load.setBackground(menuBkg);
        load.setBorder(menuBorder);
        load.setOnAction(new LoadHandler());

        save = new Button(Constants.SAVE.toUpperCase());
        save.setFont(Font.font("Times New Roman",16));
        save.setTextFill(Color.WHITE);
        save.setPrefWidth(btnWidth);
        save.setBackground(menuBkg);
        save.setBorder(menuBorder);
        save.setDisable(true);
        save.setOnAction(new SaveHandler());

        Button ranking = new Button(Constants.RANKING.toUpperCase());
        ranking.setFont(Font.font("Times New Roman",16));
        ranking.setTextFill(Color.WHITE);
        ranking.setPrefWidth(btnWidth);
        ranking.setBackground(menuBkg);
        ranking.setBorder(menuBorder);
        ranking.setOnAction(new RankingHandler());

        Button exit = new Button(Constants.EXIT.toUpperCase());
        exit.setFont(Font.font("Times New Roman",16));
        exit.setTextFill(Color.WHITE);
        exit.setPrefWidth(btnWidth);
        exit.setBackground(menuBkg);
        exit.setBorder(menuBorder);
        exit.setTooltip(new Tooltip(Constants.EXIT_TOOLTIP));
        exit.setOnAction(new ExitHandler());

        menu.getChildren().addAll(start,exit);
        menu.setAlignment(Pos.CENTER);
        this.setCenter(menu);
    }

    private void performIO(int option) {
        FileChooser chooser = new FileChooser();
        ExtensionFilter ext = new ExtensionFilter(Constants.EXT_DESCRIPTION,".pt");
        chooser.setSelectedExtensionFilter(ext);
        if (option == LOAD) {
            chooser.setTitle(Constants.LOAD);
            File choice = chooser.showOpenDialog(stage);
        } else if (option == SAVE) {
            chooser.setTitle(Constants.SAVE);
            File choice = chooser.showSaveDialog(stage);
        }
    }

    private boolean verifyRestart() {
        Alert alert = new Alert(AlertType.WARNING,Constants.START_WARNING_MESSAGE,ButtonType.YES,ButtonType.NO);
        alert.setTitle(Constants.START_WARNING);
        alert.showAndWait();

        if (alert.getResult() == ButtonType.YES)
            return true;
        return false;
    }

    private class StartHandler implements EventHandler<ActionEvent> {

        @Override
        public void handle(ActionEvent event) {
            if (display.isRunning()) {
                if (!verifyRestart())
                    return;
            }

            display.start();
            stage.setScene(displayScene);
            toGame.setDisable(false);
            save.setDisable(false);
        }

    }

    private class ContinueHandler implements EventHandler<ActionEvent> {

        @Override
        public void handle(ActionEvent event) {
            stage.setScene(displayScene);
        }

    }

    private class LoadHandler implements EventHandler<ActionEvent> {

        @Override
        public void handle(ActionEvent event) {
            if (display.isRunning()) {
                if (!verifyRestart())
                    return;
            }

            performIO(LOAD);
        }

    }

    private class SaveHandler implements EventHandler<ActionEvent> {

        @Override
        public void handle(ActionEvent event) {
            performIO(SAVE);
        }

    }

    private class RankingHandler implements EventHandler<ActionEvent> {

        @Override
        public void handle(ActionEvent event) {
            stage.setScene(displayScene);
        }

    }

    private class ExitHandler implements EventHandler<ActionEvent> {

        @Override
        public void handle(ActionEvent event) {
            performIO(SAVE);
            Platform.exit();
        }

    }

}

public static class MainDisplay extends AnchorPane {

    private boolean running;

    public MainDisplay() {
        running = false;
        tower = new Tower();
        setUp();
    }

    private void setUp() {
        Color blue = new Color(34 / 255,37 / 255,47 / 255,1.0);

        this.setBackground(new Background(new BackgroundFill(blue,null)));

        Background bkg = new Background(new BackgroundFill(null,null));

        Button home = new Button(Constants.HOME);
        home.setFont(Font.font("Times New Roman",10));
        home.setTextFill(Color.WHITE);
        home.setBackground(bkg);
        home.setBorder(menuBorder);
        home.setOnAction(new HomeHandler());
        this.getChildren().add(home);
        AnchorPane.setTopAnchor(home,10.0);
        AnchorPane.setRightAnchor(home,10.0);
    }

    public void start() {
        running = true;
    }

    public boolean isRunning() {
        return running;
    }

    private class HomeHandler implements EventHandler<ActionEvent> {

        @Override
        public void handle(ActionEvent event) {
            stage.setScene(startScene);
        }

    }

}

}

Warning: some competitions may not be ideal for the nature of JavaFX, but they will do a lot of work

The content of this article comes from the network collection of netizens. It is used as a learning reference. The copyright belongs to the original author.

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