add space between jtextareas

[System_Error]

I have an array of textareas and they are all clumped together. I was wondering if anyone knew a way to put spaces in between them. Now, I have to use the gridlayout, and I had to use Jtextareas because I don't know how to set multiline on the textfields. Here is the code:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class CheckerBoard extends JFrame
{
JButton btnGo;
JTextArea[] txtAreas;
JTextField[] txtFields;

public CheckerBoard()
{
JPanel upperPanel= new JPanel();
upperPanel.setLayout(new GridLayout(4,4));
txtAreas = new JTextArea[16];
for (int i=0; i<txtAreas.length; i++)
{
txtAreas = new JTextArea(i+"",4,4);
upperPanel.add(txtAreas);
}

JPanel inputRow = new JPanel();
inputRow.setLayout(new GridLayout(1,3));
txtFields = new JTextField[3];
for (int c=0; c<txtFields.length; c++)
{
txtFields[c] = new JTextField(8);
inputRow.add(txtFields[c]);
}

JPanel labelRow = new JPanel();
labelRow.setLayout(new GridLayout(1,3));
JLabel[] lbl = new JLabel[3];
for (int a=0; a<lbl.length; a++)
{
lbl[a] = new JLabel("");
labelRow.add(lbl[a]);
}
lbl[0].setText(" Start ");
lbl[1].setText(" Stop ");
lbl[2].setText(" Step ");


JPanel bRow = new JPanel();
btnGo = new JButton(" GO! ");
bRow.add(btnGo);

Container pane = getContentPane();
pane.setLayout(new FlowLayout());
pane.add(upperPanel);
pane.add(inputRow);
pane.add(labelRow);
pane.add(bRow);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setContentPane(pane);
setSize(370,400);
setTitle("CheckerBoard");
setVisible(true);
}

public static void main(String[] args)
{
CheckerBoard cb = new CheckerBoard();
}
}

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