Java-Buddy

Example to open and save png files, using JavaFX FileChooser.

package javafximagefilechooser;
import java.awt.Desktop;
import java.io.File;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.embed.swing.SwingFXUtils;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
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.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.FileChooser;
import javafx.stage.Stage;
import javax.imageio.ImageIO;
/**
 *
 * @web http://java-buddy.blogspot.com
 */
public class JavaFXImageFileChooser extends Application {
 @Override
 public void start(Stage primaryStage) {
 
 final FileChooser fileChooser = new FileChooser();
 final Button openButton = new Button("Open Image");
 openButton.setOnAction(
 new EventHandler<ActionEvent>() {
 @Override
 public void handle(final ActionEvent e) {
 setExtFilters(fileChooser);
 File file = fileChooser.showOpenDialog(primaryStage);
 if (file != null) {
 openNewImageWindow(file);
 }
 }
 });
 
 StackPane root = new StackPane();
 root.getChildren().add(openButton);
 
 Scene scene = new Scene(root, 400, 150);
 
 primaryStage.setTitle("java-buddy.blogspot.com");
 primaryStage.setScene(scene);
 primaryStage.show();
 }
 public static void main(String[] args) {
 launch(args);
 }
 
 private void setExtFilters(FileChooser chooser){
 chooser.getExtensionFilters().addAll(
 new FileChooser.ExtensionFilter("All Images", "*.*"),
 new FileChooser.ExtensionFilter("PNG", "*.png")
 );
 }
 
 private void openNewImageWindow(File file){
 Stage secondStage = new Stage();
 
 MenuBar menuBar = new MenuBar();
 Menu menuFile = new Menu("File");
 MenuItem menuItem_Save = new MenuItem("Save Image");
 menuFile.getItems().addAll(menuItem_Save);
 menuBar.getMenus().addAll(menuFile);
 
 Label name = new Label(file.getAbsolutePath());
 Image image = new Image(file.toURI().toString());
 ImageView imageView = new ImageView();
 
 menuItem_Save.setOnAction(new EventHandler<ActionEvent>() {
 @Override
 public void handle(ActionEvent event) {
 FileChooser fileChooser = new FileChooser();
 fileChooser.setTitle("Save Image");
 
 File file = fileChooser.showSaveDialog(secondStage);
 if (file != null) {
 try {
 ImageIO.write(SwingFXUtils.fromFXImage(imageView.getImage(),
 null), "png", file);
 } catch (IOException ex) {
 Logger.getLogger(
 JavaFXImageFileChooser.class.getName()).log(Level.SEVERE, null, ex);
 }
 }
 }
 });
 final VBox vbox = new VBox();
 vbox.setAlignment(Pos.CENTER);
 vbox.setSpacing(10);
 vbox.setPadding(new Insets(0, 10, 0, 10));
 vbox.getChildren().addAll(name, imageView);
 
 imageView.setFitHeight(400);
 imageView.setPreserveRatio(true);
 imageView.setImage(image);
 imageView.setSmooth(true);
 imageView.setCache(true);
 
 Scene scene = new Scene(new VBox(), 400, 350);
 ((VBox)scene.getRoot()).getChildren().addAll(menuBar, vbox);
 
 secondStage.setTitle(file.getName());
 secondStage.setScene(scene);
 secondStage.show();
 }
 
}

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