Howto read newline character

Hi,
I'm new to java and I'm writing a simple text editor using swt examples
from eclipse. The only problem I see is that my editor wont display the
text file correctly. It will display the whole text file in one line.

Here is the code I use to open file. I don't know where to start.

public class OpenFile extends SelectionAdapter {
    public void widgetSelected(SelectionEvent event) {
        FileDialog fileOpen = new FileDialog(shell, SWT.OPEN);
        fileOpen.setText("Open");
        String[] filterExt = { "*.txt", "*.ini", "*.*" };
        fileOpen.setFilterExtensions(filterExt);
        String selected = fileOpen.open();
        if (selected == null) {
            return;
        }
        FileReader file = null;
        try {
            file = new FileReader(selected);
        } catch (FileNotFoundException e) {
            MessageBox messageBox = new MessageBox(shell, SWT.ICON_ERROR | SWT.OK);
            messageBox.setMessage("Could not open file.");
            messageBox.setText("Error");
            messageBox.open();
            return;
        }
        BufferedReader fileInput = new BufferedReader(file);
        String textString = null;
        StringBuffer sb = new StringBuffer();
        try {
            do {
                   if (textString != null) {
                   sb.append(textString);
                   }
               } while ((textString = fileInput.readLine()) != null);
           } catch (IOException e1) {
            MessageBox messageBox = new MessageBox(shell, SWT.ICON_ERROR |
SWT.OK);
                messageBox.setMessage("Could not write to file.");
                messageBox.setText("Error");
                messageBox.open();
                return;
            }
                text.setText(sb.toString());
        }

    }

Thanks in advance,
C