JavaFX 改变图标透明度

    private Image getOpacityImage(Image image, double opacity) {
        PixelReader pixelReader = image.getPixelReader();
        WritableImage wImage = new WritableImage((int) image.getWidth(), (int) image.getHeight());
        PixelWriter pixelWriter = wImage.getPixelWriter();
        for (int readY = 0; readY < image.getHeight(); readY++) {
            for (int readX = 0; readX < image.getWidth(); readX++) {
                Color color = pixelReader.getColor(readX, readY);
                // png格式图片透明部分保持透明
                if(color.getOpacity() != 0){
                    Color c1 = new Color(color.getRed(), color.getGreen(), color.getBlue(), opacity);
                    pixelWriter.setColor(readX, readY, c1.brighter());
                }
            }
        }

        return wImage;
    }    private Image getOpacityImage(Imag