Convert Shape object to Image object in Java

问题

How do I convert a Shape object like Rectangle2D.Double to an Image object?

This way I can use a Shape object for a mousecursor replacement.

回答1:

Do draw(shape) in a BufferedImage, as shown here.

回答2:

You'll have to create an image object which contains the right pixels at the right locations.

One way would be something like this:

public Image makeImage(Shape s) {
    Rectangle r = s.getBounds();
    Image image = new BufferedImage(r.width, r.height, BufferedImage.TYPE_BYTE_BINARY);
    Graphics2D gr = image.createGraphics();
    // move the shape in the region of the image
    gr.translate(-r.x, -r.y);
    gr.draw(s);
    gr.dispose();
    return image;
}

You may want to use another color model, though, to have your shape show up with transparent background, instead of black-on-white or otherwise around.

来源：https://stackoverflow.com/questions/5449633/convert-shape-object-to-image-object-in-java