我想知道是否可以在不创建另一个图像的新实例的情况下调整BufferedImage的大小。我对此很疑惑，因为我认为每次我想为应用程序调整BufferedImage的大小时创建新图像的效率都会很低。这是一些我看到的代码，它们解释了我不想要的内容：

public static BufferedImage resize(BufferedImage img,int newW,int newH) { 
    Image tmp = img.getScaledInstance(newW,newH,Image.SCALE_SMOOTH);
    BufferedImage dimg = new BufferedImage(newW,BufferedImage.TYPE_INT_ARGB);

    Graphics2D g2d = dimg.createGraphics();
    g2d.drawImage(tmp,null);
    g2d.dispose();

    return dimg;
}

public static BufferedImage scale(BufferedImage src,int w,int h)
{
    BufferedImage img = 
            new BufferedImage(w,h,BufferedImage.TYPE_INT_RGB);
    int x,y;
    int ww = src.getWidth();
    int hh = src.getHeight();
    int[] ys = new int[h];
    for (y = 0; y < h; y++)
        ys[y] = y * hh / h;
    for (x = 0; x < w; x++) {
        int newX = x * ww / w;
        for (y = 0; y < h; y++) {
            int col = src.getRGB(newX,ys[y]);
            img.setRGB(x,y,col);
        }
    }
    return img;
}

private BufferedImage resize(BufferedImage src,int targetSize) {
    if (targetSize <= 0) {
        return src; //this can't be resized
    }
    int targetWidth = targetSize;
    int targetHeight = targetSize;
    float ratio = ((float) src.getHeight() / (float) src.getWidth());
    if (ratio <= 1) { //square or landscape-oriented image
        targetHeight = (int) Math.ceil((float) targetWidth * ratio);
    } else { //portrait image
        targetWidth = Math.round((float) targetHeight / ratio);
    }
    BufferedImage bi = new BufferedImage(targetWidth,targetHeight,src.getTransparency() == Transparency.OPAQUE ? BufferedImage.TYPE_INT_RGB : BufferedImage.TYPE_INT_ARGB);
    Graphics2D g2d = bi.createGraphics();
    g2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION,RenderingHints.VALUE_INTERPOLATION_BILINEAR); //produces a balanced resizing (fast and decent quality)
    g2d.drawImage(src,targetWidth,null);
    g2d.dispose();
    return bi;
}

感谢您的任何答复！