Class util for working with component Java JTable

JTableUtil.java

package util;

import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

public class JTableUtil {
    
    /**
     * Get model jTable in type DefaultTableModel.
     * @param jTable
     * @return (DefaultTableModel) model
     */
    public static DefaultTableModel getModel(JTable jTable) {
        return ((DefaultTableModel) jTable.getModel());
    }
    
    /**
     * Get index row selected. 
     * @param jTable
     * @return int
     */
    public static int getIndexRowSelected(JTable jTable) {
        return jTable.getSelectedRow();
    }
    
    /**
     * Get data (Object) of row selected.
     * @param jTable
     * @return Object
     * @throws Exception 
     */
    public static Object getDataRowSelected(JTable jTable) throws Exception {
        int rowSelected = jTable.getSelectedRow();
        int column = 0;
        if ( rowSelected < 0 )
            throw new Exception("No row not selected.");
        return getModel(jTable).getValueAt(rowSelected, column);
    }
    
    /**
     * Insert new row at end of jTable.
     * @param jTable
     * @param rowData 
     */
    public static void addLinha(JTable jTable, Object[] rowData) {
        getModel(jTable).addRow(rowData);
    }
    
    /**
     * Clear all rows of table.
     * @param jTable 
     */
    public static void clearTable(JTable jTable) {
        int qtdRows = jTable.getRowCount() - 1;
        for (int i = qtdRows; i >= 0; i--)
            getModel(jTable).removeRow(i);
    }
}