Are there any java library for thumbnails generation?

Question

I need some smart enough thumbnail generation lib to use it in my java app. I've found appropriate code here but I'm not sure about possible licensing issues.

Are there any free appropriate libraries?

Answer 1

There is jmagick, a Java Implementation of the popular ImageMagick framework.

Answer 2

I've checked his site and there's no mention of license. That could mean trouble. At least in Italy where I live because if there's no explicit permission you can't use works that are not yours.

I would suggest to read this question: http://stackoverflow.com/questions/169573/open-source-java-library-to-produce-webpage-thumbnails-server-side

Answer 3

If you split the task "create thumbnail" into three steps, "load image", "scale image" and "save image", you can do it with the standard Java API. You can use the static utility methods in javax.imageio.ImageIO to load and save images and use Image#getScaledInstance(...) to resize the original image. Since the Image you get from getScaledInstance is not a BufferedImage, you have to create a new BufferedImage with the correct size and paint the scaled image into the new BufferedImage before you can use ImageIO to save it.