كيفية تطبيق المزامنة في جافا و مشكلة استرجاع البيانات

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.FileChooser;
import javafx.stage.Stage;

public class javaSer extends Application implements Serializable {

    public static int inc = 0;

    @Override
    public void start(Stage primaryStage) {
        Button btn = new Button("open setting");
        Button btn2 = new Button("save setting");

        btn.setOnMouseClicked((event) -> {
            try {
                FileChooser fileChooser = new FileChooser();
                fileChooser.setTitle("open");
                File selectedFile = fileChooser.showOpenDialog(primaryStage);
                _import(selectedFile.getPath());

            } catch (Exception e) {
            }
        });

        btn2.setOnMouseClicked((event) -> {
            try {
                FileChooser fileChooser = new FileChooser();
                fileChooser.setTitle("save");
                File name = fileChooser.showSaveDialog(primaryStage);
                _export(name.getPath());
            } catch (Exception e) {
            }
        });

        VBox root = new VBox();
        root.setSpacing(20);
        
        
        Rectangle rect = new Rectangle();
        rect.setHeight(Editor.height);
        rect.setWidth(Editor.width);
        rect.setFill(Color.RED);
        rect.setTranslateX(0);
        rect.setTranslateX(0);
        rect.setOnMouseClicked((event) -> {
            Editor.height += 150;
            Editor.width += 150;
        });

        root.getChildren().addAll(btn, btn2, rect);

        Scene scene = new Scene(root, 300, 250);

        primaryStage.setTitle("Hello World!");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static class Editor implements Serializable {

        public static int height = 100 + inc;
        public static int width = 100 + inc;

        public String language;
        public String encoding;
        public String fontSize;
        public String fontFamily;
        public boolean autoSave;
        public boolean autoComplete;
        public transient String direction;

    }

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

    public void _import(String Path) {
        Editor e = new Editor();

        if (new File(Path).exists()) {
            try {
                FileInputStream fis = new FileInputStream(Path);
                ObjectInputStream ois = new ObjectInputStream(fis);

                e = (Editor) ois.readObject();

                fis.close();
                ois.close();

                System.out.println("Deserialized data has been created in the memory");
                System.out.println("Language:      " + e.language);
                System.out.println("Encoding:      " + e.encoding);
                System.out.println("Font size:     " + e.fontSize);
                System.out.println("Font family:   " + e.fontFamily);
                System.out.println("Auto save:     " + e.autoSave);
                System.out.println("Direction:     " + e.direction);
                System.out.println("Auto Complete: " + e.autoComplete);
                System.out.println("Height: " + e.height);
                System.out.println("Width : " + e.width);
                System.out.println();
            } catch (IOException | ClassNotFoundException ex) {
                System.out.println(ex.getMessage());
            }
        }

        //    _export( Path);
    }

    public void _export(String Path) {
        Editor e = new Editor();

        try {
            e.language = "woks";
            e.encoding = "utf-8";
            e.fontSize = "12pt";
            e.fontFamily = "tahoma";
            e.autoSave = true;
            e.direction = "right to left";
            e.height = e.height + inc;
            e.width = e.width + inc;
            System.out.println("" + e.height + " und " + e.width);

            FileOutputStream fos = new FileOutputStream(Path);
            ObjectOutputStream oos = new ObjectOutputStream(fos);
            oos.writeObject(e);
            oos.close();
            fos.flush();
            fos.close();

            System.out.println("path is  " + Path + "");
        } catch (IOException ex) {
            System.out.println(ex.getMessage());
        }

    }

}