Why does my JTable sort an integer column incorrectly?

Question

I have a JTable that uses a DefaultTableModel and I allow for sorting when the user clicks on the column headers. However, when the user clicks on a header for a column that

Answer 1

Here is the answer: Problems with JTable sorting of integer values

The idea is to define classes for columns.

myTable.setModel(new DefaultTableModel(Object[][] tableData, String[] columnsNames){
    Class[] types = { Boolean.class, Boolean.class, String.class, String.class };

    @Override
    public Class getColumnClass(int columnIndex) {
        return this.types[columnIndex];
    }
});