Table = new MyTable(); Não consigo usar meus metodos

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package pessoal.table;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInput;
import java.io.ObjectInputStream;
import java.io.ObjectOutput;
import java.io.ObjectOutputStream;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;
import pessoal.constantes.Constantes;

/**
 *
 * @author Alirio Oliveira
 */
public class MyTable extends JTable implements Constantes{

    public void carregar(){
        try{
            File f = new File("c:\TablePagar.ser");
            if(!f.exists()){
                DefaultTableModel model = new DefaultTableModel();
                model.setColumnIdentifiers(COLUNAS);
                model.addRow(new String[]{"","","","","","",""});
                setModel(model);
                return;
            }
                
            FileInputStream fStream = new FileInputStream(f);
            ObjectInput stream = new ObjectInputStream(fStream);
            Object obj = stream.readObject();
            if(obj instanceof DefaultTableModel)
                setModel((DefaultTableModel) obj);
            stream.close();
            fStream.close();  
            
        }catch(Exception e){
            System.err.println("Serialization error #1: "+ e.toString());
        }        
    }
    public void salvar(){
        try{
            FileOutputStream fStream = new FileOutputStream("c:\TablePagar.ser");
            ObjectOutput stream = new ObjectOutputStream(fStream);
            stream.writeObject(getModel());
            stream.flush();
            stream.close();
        }catch(Exception e){
            System.err.println("Serialization error #2: "+ e.toString());
        }        
    }


}

JTable myTable = new MyJTable();