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【Java】文本框添加背景图片

作者:DDT / 发布于2012/5/26/ 565

文本框添加背景图片

<div>public class WatermarkTextField extends JTextField {
BufferedImage img;
TexturePaint texture;</div>
<div>public WatermarkTextField(File file) throws IOException {
super();
img = ImageIO.read(file);
Rectangle rect = new Rectangle(0,0,
img.getWidth(null),img.getHeight(null));
texture = new TexturePaint(img, rect);
setOpaque(false);
}
}
<div>public void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D)g;
g2.setPaint(texture);
g.fillRect(0,0,getWidth(),getHeight());
super.paintComponent(g);
}
<div>public static void main(String[] args) throws Exception {
JFrame frame = new JFrame("Watermark JTextField Hack");</div>
<div>JTextField textfield = new WatermarkTextField(new File("red.png"));
textfield.setText("A Text Field");</div>
<div>frame.getContentPane().add(textfield);
frame.pack();
frame.show();
}

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