如何旋转Swing文本？

Question

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？

Answer 1

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). eg

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

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

Answer 2

I do not believe that Swing offers explicit support for this.
However, you can turn your text into an image, and rotate that, using the AffineTransform class.

Here is some example code , apparently taken from the book "Swing Hacks", for writing text backwards. You can easily modify it for rotating text, although you will have to add some code for the animation effect.

Answer 3

不是JLabel而是JEditorPane内容http://java-sl.com/vertical.html