Question

Java 如何加载图片到graphics2D上，用Image类好还是BufferedImage类好

Java 如何加载图片到graphics2D上，用Image类好还是BufferedImage类好？

Answer 1

一般都用那个bufferImage，下面是一个例子程序：

img = ImageIO.read(new File("img1.jpg"));
int width=img.getWidth();
int height=img.getHeight();
int type = img.getColorModel().getTransparency();
BufferedImage image1 = new BufferedImage(width, height, type);
Graphics2D graphics2D = image1.createGraphics();
graphics2D.setRenderingHint(
RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
graphics2D.setColor(Color.black);
graphics2D.fillRect(20, 20, 160, 160);
graphics2D.rotate(Math.toRadians(30),width/2,height/2);
graphics2D.drawImage(img, 10, 10, 100,100,null);
graphics2D.dispose();

Answer 2

Java 可以的话，都用 buffered...
性能比较好