Convert PNG to JPEG

ImageTest.java

        BufferedImage bufferedImage = ImageIO.read(new ByteArrayInputStream(dates));

        BufferedImage newBufferedImage = new BufferedImage(bufferedImage.getWidth(),
                bufferedImage.getHeight(), BufferedImage.TYPE_INT_RGB);
        newBufferedImage.createGraphics().drawImage(bufferedImage, 0, 0, Color.WHITE, null);

        ImageIO.write(newBufferedImage, "jpg" , new FileOutputStream(TEST_DIR + "/" + OUTPUT_FILE));