Simple example of a site that uses only servlets with annotations. The answer is based on html templates. Site drakonoved.org built on the same principle.
Creating one REST Controller, several Servlets and Custom Errors Handling.
When task is clear and you know how it solves, result depends on trifle: just to code it. And at that time in keyboard's buttons music starts to play.
Small Java code snippet to create the image containing captcha and example of adding it to a code of the site or blog.
What and how to learn in his life, everyone decides by himself. The main thing is not to make mistake in main direction, then there were no questions that to do with that education.
Consider the difference between parallel and perspective projection. Both are widely used in practice for different purposes.
The rotation of a point by a specified angle relative to another point on the plane - the secondary school curriculum in geometry. Consider an example with a square 200x200.
Found this game on GitHub - liked the transition from 2D to 3D and back by turning. Made small changes, because it's a Chinese version, which didn't fit the screen.
Plain and simple, nothing useless. I love these solutions. Sorry, this not mine. Of all the variants similar animation I most liked this one.
I was going to use this solution for my tetris 3D, but had to be abandoned because when a large number of such cubes the browser slows down.