This concise topic shows how to rotate image in Java using configuration settings alongside a systematic set of tasks to implement this feature. The Java rotate bitmap operation will be demonstrated for a user-defined angle, including how to specify the background color for areas revealed by the rotation. You will also discover how to rotate and flip images at the same time for various formats such as BMP, PNG, JPEG, etc.

Steps to Rotate Image in Java

1. Prepare the environment by adding Aspose.Imaging to the project
2. Get the input image by initiating an Image class instance
3. Typecast the picture to the RasterImage class object
4. Cache the loaded photo to the memory to optimize the performance
5. Perform the image rotation and set the background color with the rotate method
6. Export the rotated image

By leveraging the Java rotate image by angle operation, we detail the required environment setup followed by the ordered steps to achieve this functionality. The source BMP file is treated as a RasterImage, which provides multiple methods for rotation and flipping. Initially, the image is cached to improve performance; then it is rotated and flipped before being saved back to storage.

Code to Rotate Image in Java

To rotate bitmap Java, the sample uses the rotate method to apply a specific rotation to the image. You can define the background color that fills the empty regions created during the image rotation. Moreover, flipping the image is possible with the rotateFlip, which uses the RotateFlipType class, and options include Rotate90FlipX for a 90° rotation plus X-axis flip, Rotate90FlipY for a 90° rotation plus Y-axis flip, among 16 total combinations.

In this guide, we have covered how to rotate images in Java; for instructions on resizing images, see the article Change image brightness in Java.