void setRotate(double angle_in_Radians, Point2D rotationCenter) {
		setRotate(Math.cos(angle_in_Radians), Math.sin(angle_in_Radians),
				rotationCenter);
	}
void setRotate ( double angle_in_Radians , Point2D rotationCenter ) { setRotate ( Math . cos ( angle_in_Radians ) , Math . sin ( angle_in_Radians ) , rotationCenter ) ; }
Sets this transformation to be a rotation around point rotationCenter.

When the axis Y is directed up and X is directed to the right, the
positive angle corresponds to the anti-clockwise rotation. When the axis
Y is directed down and X is directed to the right, the positive angle
corresponds to the clockwise rotation.

@param angle_in_Radians
The rotation angle in radian.
@param rotationCenter
The center point of the rotation.