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Java image FAQ

I have collected some frequently asked questions on the topic of Java and images from the Java newsgroups that I read, the feedback mails that I got on my various pages and the search engine requests that led people to my pages.

The questions

• How to read and write image files with Java
• Is there some example source code that shows how to read and write image files?
• Java graphics without X server
• How can I find out about width and height of an image in a file?
• How can I save a GUI component (e.g. Canvas) into a file?
• How can I access (read or write) an Image object's pixels?
• What is the ARGB int encoding of pixels in the AWT?
• What libraries are there to do image editing / image processing?
• How can I learn the basics of Java imaging?