Add new lines to the JTable

[Marcos . Rebelo]

What is the better way to add lines to a JTable. I have my TableModal and I
add one line to the Model, know I need the line to apear in the interface.
The only way that I get it to work is with the line
'scrollPane.getViewport().add(table);' (I tryed allot of things before I get
here). 

What is the correct way to do it?
This is a simple code showing my problem.




import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.*;
import javax.swing.table.AbstractTableModel;

class MyTableModel extends AbstractTableModel {
    int nRows = 5;
    public int getRowCount() {                    
        return nRows;
    }

    public int getColumnCount() {
        return 4;
    }
                
    public Object getValueAt(int arg0, int arg1) {
        return new Integer(arg0*arg1);
    }
    
    void IncrementRow() {
        nRows++;
    }
}

public class Main {
    static JFrame m_frame;
    public static void main(String[] ARGS) {        
        m_frame = new JFrame("Teste");
        m_frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        m_frame.getContentPane().setLayout(new BorderLayout());
            
        final JTable table = new JTable();
        
        final MyTableModel myTableModel = new MyTableModel(); 
        table.setModel(myTableModel);

        final JScrollPane scrollPane = new JScrollPane(table);
            
        m_frame.getContentPane().add(scrollPane, BorderLayout.SOUTH);

        JButton bt = new JButton("XXX");
        bt.addActionListener(new ActionListener(){
            public void actionPerformed(ActionEvent arg0) {
                myTableModel.IncrementRow();
                scrollPane.getViewport().add(table);
            }
        });

        m_frame.getContentPane().add(bt, BorderLayout.NORTH);
            
        m_frame.pack();
        m_frame.setVisible(true);
    }
}
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