Java抽象类疑问：BufferStrategy与Canvas协同工作原理解析

Hey folks, I'm a Java beginner, so go easy on me! I've spent roughly 2 hours digging through Oracle's official documentation, but I'm still really confused about something.

I thought I had a solid basic understanding of abstract classes—like, they can't be instantiated directly, and you need a subclass to implement their abstract methods or fill in the missing parts. But now I'm trying to break down how BufferStrategy and Canvas work together, and I'm hitting a wall.

I know the basics: Canvas is a component you can draw graphics on, and BufferStrategy is used for efficient, flicker-free rendering with buffering. But I can't wrap my head around the exact mechanics of how these two classes collaborate. How does a Canvas utilize a BufferStrategy? Do I need to create subclasses for either to make them work together properly?

内容的提问来源于stack exchange，提问作者HotSoupp