Why would you use JNI to draw on an AWT Canvas?

Question

I am new to JNI and I stumbled upon this while looking at JNI:

Not only a built-in Java code interface, it can also use Java Canvas, which is possible using the Java AWT Native Interface

Is there a specific reason this functionality was made specific / available? Does Windows increase processing time? Please specify why and when you will use this feature.

Answer 1

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Answer 2

AWT JNI 3D- OpenGL DirectX D3D. API- Java, Java3D JOGL, Canvas.java . 2D, Java-.