Why do JPEG Images cause issues for Java Developers?
ImageIO does support JPEG file types by default but it is not a complete implementation. If you have an existing Java Application using ImageIO you will find it cannot process all JPEG images.
In this post, I will cover how to upgrade ImageIO to support JPEG files so existing Java Applications which use ImageIO will work with more JPEG files (often without having to make any code changes) and how to read JPEG files in JDeli directly.
What options are there for reading JPEG files in Java?
Java does read some JPEG images by default but you will need to use an external library or plugin for ImageIO if you want to handle more of them. JDeli has full support for JPEG images in pure Java and can also be used as an ImageIO plugin.
If you are looking for a free solution, there is JPEG support in Apache Imaging. In this article we will be using our JDeli pure Java library to read JPEG files.
How to upgrade ImageIO to read JPEG files
It’s actually very simple and can be done without rewriting your existing code!
For example, the code below does not work with ImageIO for all JPEG images
// Read JPEG image into Java with ImageIO
BufferedImage bufferedImage = ImageIO.read(new File("ImageFile.jpeg"));
Steps to fix with JDeli:
- Download the JDeli trial jar with our ImageIO plugin
- Follow the support documentation to install
How to read a JPEG image in Java with JDeli
- Add JDeli to your class or module path (download the trial jar).
- Create a File handle, InputStream pointing to the raw JPEG image. You can also use a byte[] containing the image data.
- Read the JPEG image into a BufferedImage
and the Java code to read JPEG images directly with JDeli…
File file = new File("/path/to/image.jpg");
BufferedImage image = JDeli.read(file);
Other useful JPEG links
- Related articles on our support site.
- How to write JPG files in Java.
- How to convert other files to JPG in bulk (Tutorials)