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You're going to struggle if you want to avoid anything you're not already familiar with!

The API docs are the first point of reference for Java classes: BufferedImage. To find out how to use them,...

What is the problem with the example code in the links already provided?

Sorry, I don't understand the question. In a Java image, you can make a color transparent by setting the alpha channel value that is part of the Java color model - for example, to create a...

If you want to make part of an image transparent, you must make the colors in that part of the image transparent. If by 'background' of the image you don't mean part of the image, then please explain...

Did you try Google? I took me 20 seconds to find this: How To Make a Color Transparent and this: Transparent Color.

Having said that, this forum is not a Google front-end. Please use search...