Java Swing Table透明度 [英] Java swing Table transparency

问题描述

我想更改JTable的透明度，以查看像照片这样的单元格后面有什么可能?

I want to change the transparency of the JTable to see what behind cells like a photo is it possible?

推荐答案

这可以使用JTable和TableCellRenderer上的setOpaque(false)完成.屏幕截图由以下代码生成:

This can be done using setOpaque(false) on the JTable and the TableCellRenderer. The screenshot is produced by the code below:

代码:

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);
}

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