主要代码： @Override public void paint(Graphics g,JComponent c) { super.paint(g, c); Graphics2D g2d=(Graphics2D)g; int h=c.getHeight(); int w=c.getWidth(); float tran=1F; g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON); GradientPaint p1;