如何旋转Swing文本？ [英] How to rotate Swing text?

问题描述

有没有办法旋转Swing文本，例如在JLabel中以0度到360度（或-180到180度）之间以1度的步长旋转？

Is there a way to rotate Swing text such as in a JLabel between 0 and 360 (or between -180 and 180) degrees in 1 degree steps?

推荐答案

是的。看看Graphics2D.rotate（）。对于JLabel，我认为你可以覆盖paintComponent（）方法来调用rotate（x），然后调用现有的paintComponent（），然后调用rotate（-x）。例如。

Yes. Look at Graphics2D.rotate(). For a JLabel, I think you could override the paintComponent() method to call rotate(x), then call the existing paintComponent(), then call rotate(-x). e.g.

protected void paintComponent(Graphics g) {
   Graphics2D g2 = ( Graphics2D )g;
   g2.rotate(theta);
   super.paintComponent(g2);
   g2.rotate(-theta);
}

我没试过这个。您可能需要添加偏移量，请参阅Graphics2D.rotate（double theta，double x，double y）

I haven't tried this. You might need to add an offset, see Graphics2D.rotate(double theta, double x, double y)

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