Compress a BufferedImage to JPEG in memory

JPEG.java

    public static BufferedImage comp(BufferedImage image, float comp) throws IOException {
        ImageWriter jpgWriter = ImageIO.getImageWritersByFormatName("jpg").next();
        ImageWriteParam jpgWriteParam = jpgWriter.getDefaultWriteParam();
        jpgWriteParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
        jpgWriteParam.setCompressionQuality(comp);

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ImageOutputStream stream = ImageIO.createImageOutputStream(outputStream);
        jpgWriter.setOutput(stream);
        jpgWriter.write(null, new IIOImage(image, null, null), jpgWriteParam);

        byte[] bytes = outputStream.toByteArray();
        stream.close();

        return ImageIO.read(new ByteArrayInputStream(bytes));
    }