JavaFX sample to save a color adjusted image to a file.

SaveAdjustedImage.java

import java.io.File;
import java.io.IOException;
import javafx.application.Application;
import javafx.embed.swing.SwingFXUtils;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.ToggleButton;
import javafx.scene.effect.ColorAdjust;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.*;
import javafx.stage.Stage;
import javax.imageio.ImageIO;

public class SaveAdjustedImage extends Application {
  public static void main(String[] args) throws Exception { launch(args); }
  @Override public void start(final Stage stage) throws Exception {
    // create an image for adjustment.
    final ImageView imageView = new ImageView(new Image(
      "http://icons.iconarchive.com/icons/aha-soft/desktop-buffet/128/Pizza-icon.png"
    ));
    
    // add a status label to register program actions.
    final Label status = new Label();
    
    // add a control which can adjust the image.
    final ColorAdjust monochrome = new ColorAdjust(0, -1, 0, 0);
    final ToggleButton adjustButton = new ToggleButton("Adjust");
    adjustButton.setOnAction(new EventHandler<ActionEvent>() {
      @Override public void handle(ActionEvent arg0) {
        if (adjustButton.isSelected()) {
          imageView.setEffect(monochrome);
          status.setText("Applied monochrome effect.");
        } else {
          imageView.setEffect(null);
          status.setText("Removed monochrome effect.");
        }  
      }
    });
    
    // add a control to save the image.
    final Button saveButton = new Button("Save");
    saveButton.setOnAction(new EventHandler<ActionEvent>() {
      @Override public void handle(ActionEvent arg0) {
        try {
          String fileType = monochrome.equals(imageView.getEffect()) ? "Monochrome" : "Color";
          File output = new File("Pizza" + fileType + ".png");
          
          ImageIO.write(SwingFXUtils.fromFXImage(imageView.snapshot(null, null), null), "png", output);

          status.setText("Saved: " + System.getProperty("user.dir") + File.separatorChar + output.getPath());
        } catch (IOException ex) {
          System.out.println("Ah, the pizza saving failed, due to: " + ex);
        }
      }
    });

    // layout the scene.
    Region spring = new Region();
    VBox.setVgrow(spring, Priority.ALWAYS);
    stage.setScene(
      new Scene(
        VBoxBuilder.create().spacing(5).children(
          imageView,
          HBoxBuilder.create().spacing(10).children(
            adjustButton, saveButton
          ).build(),
          spring,
          status
        ).style("-fx-padding: 10; -fx-background-color: cornsilk;").build(),
        425, 200    
      )
    );
    stage.show();
  }
}