Defina o tipo de dados da coluna em uma JTable

Criei uma JTable com um modelo de tabela. Agora, com base em uma entrada que tenho, quero transformar uma coluna em um tipo de dados específico. Como eu faço isso

import java.awt.GridLayout;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.AbstractTableModel;

public class MyTableModelTwo extends AbstractTableModel {

    private static final long serialVersionUID = 1L;
    private Object[][] data;
    private String[] columnNames;

    public MyTableModelTwo(Object[][] data) {
        this.data = data;
    }

    @Override
    public int getRowCount() {
        return data.length;
    }

    @Override
    public int getColumnCount() {
        return columnNames.length;
    }

    @Override
    public Object getValueAt(int rowIndex, int columnIndex) {
        return data[rowIndex][columnIndex];
    }

    @Override
    public Class<?> getColumnClass(int c) {
        return getValueAt(0, c).getClass();
    }

    @Override
    public boolean isCellEditable(int rowIndes, int columnIndex) {
        return true;
    }

    @Override
    public String getColumnName(int index) {
        return columnNames[index];
    }

    @Override
    public void setValueAt(Object value, int rowIndex, int columnIndex) {
        data[rowIndex][columnIndex] = value;
        fireTableCellUpdated(rowIndex, columnIndex);
    }

    public MyTableModelTwo(String[] columnNames, Object[][] data) {
        this.columnNames = columnNames;
        this.data = data;
    }
}

class MyTableTwo extends JPanel implements TableModelListener {

    private static final long serialVersionUID = 1L;
    private JTable table;
    private Object[][] data;
    private JTextField t;

    public MyTableTwo(int noElements, String[] columnNames) {
        data = new Object[noElements][columnNames.length];
        t = new JTextField();
        MyTableModelTwo m = new MyTableModelTwo(columnNames, data);
        table = new JTable(m);
        table.getModel().addTableModelListener(this);
        setLayout(new GridLayout(1, 0));
        JScrollPane scrollPane = new JScrollPane(table);
        add(scrollPane);
    }

    @Override
    public void tableChanged(TableModelEvent e) {
    }

    public JTextField returnT6() {
        return t;
    }
}

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