Simple example of using Java to achieve a small ball rebound (the algorithm is very simple)

The core code is as follows:

 if(addX){x+=3;}else{x-=3;}if(addY){y+=6;}else{y-=6;}if(x<=0||x>=(width-50)){addX=!addX;}if(y<=0||y>=(height-50)){addY=!addY;}

Determine the angle according to the incremental values ​​of x and y.

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