How to write BMP images in Java

In this article, I will show you how to write BMP images in Java. We also have a related article covering how to read BMP files in Java.

ImageIO can write out images as BMP files, but it offers very little control over the process or the output. So we added the ability to write out images as BMP files to JDeli. In this article, I show you how to use either JDeli or ImageIO and cover the benefits of JDeli.

How to write out an image as a BMP file in ImageIO

1. Create a File (or OutputStream) object

   File file = new File("/path/to/outputFile.bmp"));

2. Pass image, BMP type and File (or OutputStream) object into write method

   ImageIO.write(bufferedImage, "BMP", file);

Note you can easily switch to JDeli and replace ImageIO by just changing ImageIO.write to JDeli.write.

How to write out an image as a BMP file with JDeli

1. Add JDeli to your class or module path. (download link to the trial jar).
2. Create a File (or OutputStream) object

   File file = new File("/path/to/outputFile.bmp"));

3. Pass image, BMP type and File (or OutputStream) object into write method

   JDeli.write(bufferedImage, "BMP", file);

In JDeli you can also use a typesafe version

JDeli.write(bufferedImage, OutputFormat.BMP, file);

or pass in a BmpEncoderOptions object for more control over BMP image output.

BmpEncoderOptions options = new BmpEncoderOptions();
JDeli.write(bufferedImage, options, file);