Matriz de JTextField

import javax.swing.JTextField;

/**
 *
 * @author
 */
public class Crossword extends javax.swing.JFrame {

   
   
    /** Creates new form Crossword */
    public Crossword() {
        initComponents();

        JTextField[][] tf = new JTextField[3][3];

         for (int linha = 0; linha < tf.length; linha++) {

            for (int coluna = 0; coluna < tf[linha].length; coluna++) {

                tf[linha][coluna] = new JTextField(" ");

                jPanel1.add(tf[linha][coluna]);

            }
        }

    }

    
    @SuppressWarnings("unchecked")
 
    /**
    * @param args the command line arguments
    */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {

                new Crossword().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JPanel jPanel1;
    // End of variables declaration                   

}

package guj;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
import java.awt.GridLayout;

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

public class TesteJTextFields extends JFrame {

	private static final long serialVersionUID = 1L;
	private JPanel jContentPane = null;
	private JPanel pnlTextFields = null;
	private JPanel pnlButtons = null;
	private JButton btnOK = null;
	private JTextField[][] txtFields = new JTextField[2][3];

	/**
	 * This method initializes pnlTextFields	
	 * 	
	 * @return javax.swing.JPanel	
	 */
	private JPanel getPnlTextFields() {
		if (pnlTextFields == null) {
			GridLayout gridLayout = new GridLayout();
			gridLayout.setRows(2);
			gridLayout.setColumns(3);
			gridLayout.setHgap(2);
			gridLayout.setVgap(2);
			pnlTextFields = new JPanel();
			pnlTextFields.setLayout(gridLayout);
			for (int row = 0; row < 2; row++) {
				for (int col = 0; col < 3; col++) {
					pnlTextFields.add(getTxtField(row, col));
				}
			}
		}
		return pnlTextFields;
	}

	/**
	 * This method initializes pnlButtons	
	 * 	
	 * @return javax.swing.JPanel	
	 */
	private JPanel getPnlButtons() {
		if (pnlButtons == null) {
			pnlButtons = new JPanel();
			pnlButtons.setLayout(new FlowLayout());
			pnlButtons.add(getBtnOK(), null);
		}
		return pnlButtons;
	}

	/**
	 * This method initializes btnOK	
	 * 	
	 * @return javax.swing.JButton	
	 */
	private JButton getBtnOK() {
		if (btnOK == null) {
			btnOK = new JButton();
			btnOK.setText("OK");
		}
		return btnOK;
	}

	/**
	 * This method initializes txtField	
	 * 	
	 * @return javax.swing.JTextField	
	 */
	private JTextField getTxtField(int i, int j) {
		if (txtFields[i][j] == null) {
			txtFields[i][j] = new JTextField();
		}
		return txtFields[i][j];
	}

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				TesteJTextFields thisClass = new TesteJTextFields();
				thisClass.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
				thisClass.setVisible(true);
			}
		});
	}

	/**
	 * This is the default constructor
	 */
	public TesteJTextFields() {
		super();
		initialize();
	}

	/**
	 * This method initializes this
	 * 
	 * @return void
	 */
	private void initialize() {
		this.setSize(300, 200);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		this.setContentPane(getJContentPane());
		this.setTitle("Teste Matriz de JTextFields");
	}

	/**
	 * This method initializes jContentPane
	 * 
	 * @return javax.swing.JPanel
	 */
	private JPanel getJContentPane() {
		if (jContentPane == null) {
			jContentPane = new JPanel();
			jContentPane.setLayout(new BorderLayout());
			jContentPane.add(getPnlTextFields(), BorderLayout.NORTH);
			jContentPane.add(getPnlButtons(), BorderLayout.SOUTH);
		}
		return jContentPane;
	}

}