Creation dynamique de zone texte en java

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

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Nina2009Sample extends JFrame {
	private static final long serialVersionUID = 1L;
	private final static int ROW_SIZE = 4;
	private JTextField[] tfArray = new JTextField[ROW_SIZE * ROW_SIZE];

	public static void main(String args[]) {
		try {
			Nina2009Sample frame = new Nina2009Sample();
			frame.setVisible(true);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public Nina2009Sample() {
		super();
		getContentPane().setLayout(new BorderLayout());
		setBounds(100, 100, 500, 375);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		final JPanel centerPane = new JPanel();
		centerPane.setLayout(new GridLayout(ROW_SIZE, ROW_SIZE));
		getContentPane().add(centerPane);

		final JPanel southPane = new JPanel();
		final FlowLayout flowLayout_1 = new FlowLayout();
		flowLayout_1.setAlignment(FlowLayout.RIGHT);
		southPane.setLayout(flowLayout_1);
		getContentPane().add(southPane, BorderLayout.SOUTH);

		final JButton printCellValuesButton = new JButton();
		printCellValuesButton.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				for (int i = 0; i < ROW_SIZE; i++) {
					for (int j = 0; j < ROW_SIZE; j++) {
						System.out.print("[" + tfArray[i * ROW_SIZE + j].getText() + "]\t");
					}
					System.out.println();
				}
			}
		});

		printCellValuesButton.setText("Print Cell Values");
		southPane.add(printCellValuesButton);
		final FlowLayout flowLayout = new FlowLayout();
		flowLayout.setAlignment(FlowLayout.RIGHT);

		for (int i = 0; i < ROW_SIZE; i++) {
			for (int j = 0; j < ROW_SIZE; j++) {
				tfArray[i * ROW_SIZE + j] = new JTextField("cell " + i + ":" + j);
				centerPane.add(tfArray[i * ROW_SIZE + j]);
			}
		}
		//
	}
}