Die Anleitung zu JavaFX Image und ImageView

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Die Anleitungen JavaFX

JavaFX Image
JavaFX ImageView
Zum Beispiel: rotieren und skalieren (rotate und scale)

1- JavaFX Image

Mittels JavaFX können Sie mit den populären Bildsformate arbeiten. Durch class javafx.scene.image.Image ist das Bild aus Hard disk oder Internet herunterladet.Um das Bild auf JavaFX anzuzeigen benutzen Sie class ImageView.

Die Constructor der class Image helfen Ihnen bei der Ladung eines Bild Daten

** Image **

Image(InputStream inputStream)

Image(InputStream is, double requestedWidth, double requestedHeight,
           boolean preserveRatio, boolean smooth)

Image(String url)

Image(String url, boolean backgroundLoading)

Image(String url, double requestedWidth, double requestedHeight,
            boolean preserveRatio, boolean smooth)

Image(String url, double requestedWidth, double requestedHeight,
            boolean preserveRatio, boolean smooth, boolean backgroundLoading)

Image Ladung aus ein URL:

String url = "http://somedomain/images/image.png";

boolean backgroundLoading = true;

// The image is being loaded in the background
Image image = new Image(url, backgroundLoading);

Oder am meisten gewöhnlich laden Sie ein Image aus Hard Disk

// An image file on the hard drive.
File file = new File("C:/MyImages/myphoto.jpg");

// --> file:/C:/MyImages/myphoto.jpg
String localUrl = file.toURI().toURL().toString();

Image image = new Image(localUrl);

Die Image können in einer jar file oder eine Package in Ihre Projekt liegen. Und Sie können die Constructor Image(InputStream) um die Image zu herunterladen

// MyClass is located in the same project with images,
// or in the same jar file with images.

Class<?> clazz = MyClass.class;

InputStream input = clazz.getResourceAsStream("/org/o7planning/javafx/icon/java-32.png");

Image image = new Image(input);

2- JavaFX ImageView

ImageView hilft Ihnen bei der Image Anzeige auf der Applikation JavaFX. Sie können auch die Effekte für Image verwenden wie zoom in, zoom out, rotieren,...

ImageViewDemo.java

package org.o7planning.javafx.image;

import java.io.InputStream;

import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;

public class ImageViewDemo extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {

        Class<?> clazz = this.getClass();

        InputStream input = clazz.getResourceAsStream("/org/o7planning/javafx/icon/java-48.png");

        Image image = new Image(input);

        ImageView imageView = new ImageView(image);

        InputStream input2 = clazz.getResourceAsStream("/org/o7planning/javafx/icon/java-48.png");
        Image image2 = new Image(input2, 100, 200, false, true);
        ImageView imageView2 = new ImageView(image2);

        FlowPane root = new FlowPane();
        root.setPadding(new Insets(20));

        root.getChildren().addAll(imageView, imageView2);

        Scene scene = new Scene(root, 400, 200);

        primaryStage.setTitle("JavaFX ImageView (o7planning.org)");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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

}

3- Zum Beispiel: rotieren und skalieren (rotate und scale)

ImageViewDemo2.java

package org.o7planning.javafx.image;

import java.io.InputStream;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.FlowPane;
import javafx.stage.Stage;

public class ImageViewDemo2 extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception {

        Class<?> clazz = this.getClass();

        InputStream input = clazz.getResourceAsStream("/org/o7planning/javafx/icon/java-48.png");

        Image image = new Image(input);

        ImageView imageView = new ImageView(image);

        Button buttonRotate = new Button("Rotate");
        buttonRotate.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent event) {
                double value = imageView.getRotate();
                imageView.setRotate(value + 30);
            }
        });
       
        Button buttonScale = new Button("Scale X * 2");
        buttonScale.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent event) {
                imageView.setScaleX(2); ;
            }
        });

        FlowPane root = new FlowPane();
        root.setPadding(new Insets(20));
        root.setHgap(20);

        root.getChildren().addAll(buttonRotate,buttonScale, imageView);

        Scene scene = new Scene(root, 400, 200);

        primaryStage.setTitle("JavaFX ImageView (o7planning.org)");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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

}

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Die Anleitungen JavaFX