java JTextField美化Demo

实现圆角矩形边框,hint文字,主要代码: Graphics2D g2d=(Graphics2D) g; g2d.setStroke(new BasicStroke(2,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND)); g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER,0.5f)); g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, Renderi