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 {@Overridepublic 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();}}