Change JTable column header text

Ever tried to change a column header text and the text doesn't change?

This is how it can be done:

JTable table;

DefaultTableModel model = new DefaultTableModel();

model.addColumn("Directory");

model.addColumn("Files");    

table = new JTable(model);

JScrollPane scrollPane = new JScrollPane(table);

//Changes Collumn header text

table.getColumnModel().getColumn(0).setHeaderValue("After");

table.getColumnModel().getColumn(1).setHeaderValue("Before");

                           

// Forces the header to resize and repaint itself

table.getTableHeader().resizeAndRepaint();