How to make  a diagonal ellipse?

Hi everybody,
I've been trying to work out how to make a diagonal ellipse.
Could someone please help me with this? Thanks in advance.

This visually displays a rotated ellipse.
Ellipse2D ellipse = ...;
Graphics2D g2d = ...
g2d.rotate(angleInRadians,ellipse.getCenterX(),ellipse.getCenterY());
g2d.draw(ellipse);Or if you want an actual Shape object that represents the rotated ellipse, then
Ellipse2D ellipse = ...;
AffineTransform tf = AffineTransform.getRotatedInstance(angleInRadians,
            ellipse.getCenterX(),ellipse.getCenterY());
Shape diagEllipse = tf.createTransformedShape(ellipse);

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