在JTable中的单元格之间添加边框

Question

I'm trying to display a JTable as a grid, with lines between the cells. I've only been able to add borders within individual cells, though, which never looks correct; if I add full borders, I get a bunch of disconnected boxes, which looks ugly and wrong. Using MatteBorders (as the below code) looks a little better, but results in gaps where border lines don't quite meet.

public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
    Component stamp = super.prepareRenderer(renderer, row, column);
    int top = 1;
    int left = 1;
    int bottom = row == 7 ? 1 : 0; //Grid is always 8x8, this ensures the bottom/right will have full borders.
    int right = column == 7 ? 1 : 0;
    MatteBorder border = new MatteBorder(top, left, bottom, right, Color.BLACK);
    if (stamp instanceof JComponent) {
        ((JComponent) stamp).setBorder(border);
    }
    return stamp;
}

I feel like there must be some way to do this properly, so that I just get grid lines between cell elements. What am I missing? If nothing else, is there a way to get MatteBorder to stretch across the gaps, or to push a normal border out slightly further so that the borders of adjacent cells overlap?

EDIT: Got it working with setShowGrid(true) and setGridColor(Color.BLACK).

Answer 1

使用JTable.setShowGrid(true)显示默认边框，或使用setShowHorizontalLines(boolean showHorizontalLines)或setShowVerticalLines(boolean showVerticalLines)仅显示水平线或垂直线