gistfile1.txt

        map.put(RenderingHints.KEY_INTERPOLATION,
        RenderingHints.VALUE_INTERPOLATION_BILINEAR);

        map.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);

        map.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        RenderingHints hints = new RenderingHints(map);
        BufferedImageOp op = new ConvolveOp(new Kernel(3, 3, blurKernel), ConvolveOp.EDGE_NO_OP, hints);
        return op.filter(image, null);
    }


     private BufferedImage createCompatibleImage(BufferedImage image) {
        GraphicsConfiguration gc = BufferedImageGraphicsConfig.getConfig(image);
        int w = image.getWidth();
        int h = image.getHeight();
        BufferedImage result = gc.createCompatibleImage(w, h, Transparency.TRANSLUCENT);
        Graphics2D g2 = result.createGraphics();
        g2.drawRenderedImage(image, null);
        g2.dispose();
        return result;
    }

     private BufferedImage resize(BufferedImage image, int width, int height) {
        int type = image.getType() == 0 ? BufferedImage.TYPE_INT_ARGB : image.getType();
        BufferedImage resizedImage = new BufferedImage(width, height, type);
        Graphics2D g = resizedImage.createGraphics();
        g.setComposite(AlphaComposite.Src);
        g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
        RenderingHints.VALUE_INTERPOLATION_BILINEAR);
        g.setRenderingHint(RenderingHints.KEY_RENDERING,
        RenderingHints.VALUE_RENDER_QUALITY);
        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
        RenderingHints.VALUE_ANTIALIAS_ON);
        g.drawImage(image, 0, 0, width, height, null);
        g.dispose();
        return resizedImage;
    }

    private BufferedImage resizeTrick(BufferedImage image, int width, int height,boolean blur ) {
        image = createCompatibleImage(image);

        /**
        * If you want to blur image
        */
        if(blur) {
            image = blurImage(image);
        }
        return resize(image, width, height);
}