private class Renderer extends DefaultTableCellRenderer
{
    private static final long serialVersionUID = 1L;
    @Override
    public Component getTableCellRendererComponent(JTable table, Object value,
                                         boolean isSelected, boolean hasFocus,
                                         int row, int column)
    {
        super.getTableCellRendererComponent(table, value, isSelected,
                                                          hasFocus, row, column);

        int columnIndex = table.getSelectedColumn();
        int rowIndex = table.getSelectedRow();

        if (columnIndex != -1 && rowIndex != -1){
            this.setBackground(Color.BLUE);
        } else {
            if (row % 2 == 0) this.setBackground(Color.decode("0xF9F9F9"));
            else this.setBackground(Color.decode("0xF1F1F1"));
        }
        return this;
    }
}

if (!isSelected) {
  setBackground(...);
}

HighlighterPipeline highlighters = new HighlighterPipeline();
highlighters.addHighlighter(new AlternateRowHighlighter());
table.setHighlighters(highlighters);

JXTable table;
Highlighter alternateStriping =
  HighlighterFactory.createAlternateStriping( Color.decode( "0xF9F9F9" ),
                                              Color.decode( "0xF1F1F1" ) );
table.setHighlighters( alternateStriping );