JTable header text wrapping for multiline header (custom TableCellRenderer)

Question

How can I obtain a multiline JTable header where the header column correctly enlarges to fit some text and then wraps to a new line?

Something like shown below:

Answer 1

you need a Conponent that is able to wordwrap its content like JTextArea. I changed the cell renderer from your SSCCE so that is works initially, but it has a nasty resize behavior.

 class MultiLineHeaderRenderer extends JTextArea implements TableCellRenderer {
    public MultiLineHeaderRenderer()
    {
        setAlignmentY(JLabel.CENTER);
        setLineWrap(true);
        setWrapStyleWord(true);
        setBorder(BorderFactory.createCompoundBorder(
                BorderFactory.createLineBorder(Color.BLACK),
                BorderFactory.createEmptyBorder(3,3,3,3)
                ));

    }

    @Override
    public Component getTableCellRendererComponent(JTable table,
            Object value,
            boolean isSelected,
            boolean hasFocus,
            int row,
            int column) {
        setFont(table.getFont());
        String str = (value == null) ? "" : value.toString();
        setText(str);
        int columnWidth= getColumnWidth();
        setRows(str.length()/columnWidth);
        return this;
    }
}