How to merge GIF images using Java

GIF Merger Java API

GroupDocs.Merger allows developers to combine multiple GIF documents in the preferred order and save them as a single file.

About GIF File Format

GIF, Graphics Interchange Format, is a raster file format designed for relatively basic images that appear mainly on the internet. Each file can support up to 8 bits per pixel and can contain 256 indexed colors. GIF files also allow images or frames to be combined, creating basic animations.

Download and Configure

You can follow the steps below to reference GroupDocs.Merger for Java downloaded from official website Downloads section:

  1. Unpack zip archive .
  2. Switch to lib folder.
  3. Run install.bat (for Windows) or (for Linux) file to install the library in your local maven repository.
  4. After this you should add the merger dependency block to your pom.xml project file.

Source GIF images

“Sample1.gif” “Sample2.gif” “Sample3.gif”

How to merge GIF files in horizontal mode

The following example demonstrates how to merge image files in horizontal mode with several lines of java code:

  • Create an instance of Merger class and pass source image file path as a constructor parameter. You may specify absolute or relative file path as per your requirements.
  • Create an instance of ImageJoinOptions class and pass enum value of ImageJoinMode as a constructor parameter.
  • Add another image file to merge with Join method and pass instance of ImageJoinOptions class as a method parameter. Repeat this step for other image documents you want to merge.
  • Call Merger class Save method and specify the filename for the merged image file as parameter.
// Load the source image file
Merger merger = new Merger("c:\sample1.gif")

// Define image join options with horizontal join mode
ImageJoinOptions joinOptions = new ImageJoinOptions(ImageJoinMode.Horizontal);
// Add another image file to merge
merger.join("c:\sample2.gif", joinOptions);
// Add next image file to merge
merger.join("c:\sample3.gif", joinOptions);
// Merge image files and save result"c:\merged.gif");

Result merged GIF image


Code Examples

Please find more use-cases and complete java sources of our backend and frontend examples and try them for free!

Merge GIF Live Demo

GroupDocs.Merger for Java provides an online GIF Merger App, which allows you to try it for free and check its quality and accuracy.