CSS font stacks & developer FAQs with Web standards
Rectangle on a Graphics instance?
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A: When you have a method that takes an object as an argument, you must pass an object of the specified type in the method call. There is no Graphics method that accepts a Rectangle to draw, nor a Rectangle method that accepts a Graphics object to render to.
Since Graphics is an abstract class, you must obtain a concrete implementation. You can then use its drawRect(int x, int y, int width, int height) method to draw an outline of your rectangle, as below.
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How do I draw a Rectangle on a Graphics instance?