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Editorial Team
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Asked: 2026-05-31T21:48:48+00:00

I used the Vertical Table Header Cell Renderer that is available in this site

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I used the Vertical Table Header Cell Renderer that is available in this site here
It works great for me but I need a clue on how can I have in some headers that are vertically aligned multiple rows like this you can see in the image of the example (Coordinate Geometry). I tried to set the strings with the appropriate \n character but I think my approach is very simplistic and wrong.
Please keep it simple.
Thank you!

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1 Answer

  1. Editorial Team

    From Joop answer, I made this. Instead of changing the label directly you can keep your \n.

    In your file DefaultTableHeaderCellRenderer.java, replace getTableCellRendererComponent with this method :

        public Component getTableCellRendererComponent(JTable table, Object value,
              boolean isSelected, boolean hasFocus, int row, int column) {

          String str = (value == null) ? "" : value.toString();
            BufferedReader br = new BufferedReader(new StringReader(str));
            String line;
            StringBuilder sb = new StringBuilder("<HTML>");
            try {
                while ((line = br.readLine()) != null) {
                    sb.append(line).append("<br/>");
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
            sb.append("</HTML>");
        super.getTableCellRendererComponent(table, sb,
                isSelected, hasFocus, row, column);
        JTableHeader tableHeader = table.getTableHeader();
        if (tableHeader != null) {
          setForeground(tableHeader.getForeground());
        }
        setIcon(getIcon(table, column));
        setBorder(UIManager.getBorder("TableHeader.cellBorder"));
        return this;
      }
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