我想改变JTable的透明度,看看像照片这样的细胞背后有什么可能吗?
This can be done using setOpaque(false)
on the JTable
and the TableCellRenderer
. The screenshot is produced by the code below:
Code:
public static void main(String[] args) throws MalformedURLException, IOException{
final BufferedImage image = ImageIO.read(new URL(
"http://upload.wikimedia.org/wikipedia/en/2/24/Lenna.png"));
JFrame frame = new JFrame("Test");
frame.add(new JTable(18, 5) {{
setOpaque(false);
setDefaultRenderer(Object.class, new DefaultTableCellRenderer() {{
setOpaque(false);
}});
}
@Override
protected void paintComponent(Graphics g) {
g.drawImage(image, 0, 0, getWidth(), getHeight(), null);
super.paintComponent(g);
}
});
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
You can set background color to have some alpha component:
Color backgound = new Color(0, 0, 0, 255) //total transparency
For more help on what you are trying to accomplish, post a SSCCE .
I tried this answer:
Color backgound = new Color(0, 0, 0, 255) //total transparency
but it didn't work. The following worked:
Color backgound = new Color(0, 0, 0, 0) //total transparency
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