如何在JTable中更改单元格的颜色并对其进行动画处理？

Question

I have a JTable with numbers. I know how to change color of one cell or all cells. But how to change color of cell in and animate it ? For example, The first cell of red, there is a delay, and the second cell is painted in the same red color and so on.

I inherited class DefaultTableCellRenderer

    class paintCell extends DefaultTableCellRenderer {
    public Component getTableCellRendererComponent(JTable table,
            Object value, boolean isSelected, boolean hasFocus, int row,
            int column) {
        Component c = super.getTableCellRendererComponent(table, value,
                isSelected, hasFocus, row, column);
        return c;
    }
}

And set method table.setDefaultRenderer(Object.class, new paintCell());

Answer 1

Create the javax.swing.Timer object. Add the int pointer field in your PaintCell renderer class and increase it on Timer.actionPerfomed() . Then, in PaintCell.getTableCellRendererComponent method cast the value parameter to int type (as you said, you have a digits in cells) and compare it with your pointer field. If it equals or less , set cells' background to red .

Answer 2

private JTable table;
private int index;
private void startAnimation() {
    Timer timer = new Timer(1000, new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            index++;
            if (index > table.getRowCount() * table.getColumnCount())
                index = 0;
            table.repaint();
        }
    });
    timer.setRepeats(true);
    timer.start();
}
class PaintCell extends DefaultTableCellRenderer {
    private static final long serialVersionUID = 1L;
    public Component getTableCellRendererComponent(JTable table,
            Object value, boolean isSelected, boolean hasFocus, int row,
            int column) {
        Component c = super.getTableCellRendererComponent(table, value,
                isSelected, hasFocus, row, column);
        int id = row * table.getRowCount() + column;
        c.setBackground(id < index ? Color.RED : null);
        return c;
    }
}

(SeniorJD is faster than me... But I wrote the code without his answer)