How to retrieve index of combobox from a string?

I have the String for a combobox item, but when the user clicks the table, the combobox must automatically select the category of that certain item. However, I came across that there is no getIndex function as I put below. How can I retrieve the index from this string?

private void TabelaMouseClicked(java.awt.event.MouseEvent evt) {                                    
    // Click na tabela para selecionar produto:
    if (Tabela.getSelectedRow() != -1){

        txt_descricao.setText(Tabela.getValueAt(Tabela.getSelectedRow(), 1).toString());
        cb_marca.getIndexOf("teste");

    }
}