如何更改特定表格 header 的背景颜色和 JTable 中特定列的字体颜色？

Question

Is there a way to change the background color of the 3 circled table headers of a JTable ?

I also want to change the font color of all the 3 circled columns to red.

An image of my table is down below. Thanks.

Answer 1

The way I know of is to create a TableCellRenderer that will handle the coloring of the foreground and background color.

You could create a simple coloring scheme where the color doesn't change. You often see this in tables with alternating colored rows. You could also use it for "conditional formatting". For example, highlight a cell if a value falls under a certain value. With a cell renderer, you will have better control of this.

Here is a link to Oracle's tutorial on renderers .

Lastly, since your question specifically asks to do this on specific cells, the link documentation states that

To specify a cell-specific renderer , you need to define a JTable subclass that overrides the getCellRenderer method. For example, the following code makes the first cell in the first column of the table use a custom renderer :

TableCellRenderer weirdRenderer = new WeirdRenderer();
table = new JTable(...) {
    public TableCellRenderer getCellRenderer(int row, int column) {
        if ((row == 0) && (column == 0)) {
            return weirdRenderer;
        }
        // else...
        return super.getCellRenderer(row, column);
    }
};