Delete the first 5 characters from JTextArea in Java

import java.awt.Font;
//from   w  w w  .j  a v a  2 s  .c  om
import javax.swing.JFrame;
import javax.swing.JTextArea;

public class Main extends JFrame {

  public Main() {
    JTextArea textArea = new JTextArea("Initial Text");
    textArea.setFont(new Font("LucidaSans", Font.PLAIN, 40));
    add(textArea);    

    int start = 0;
    int end = 5;
    textArea.replaceRange(null, start, end);
  }

  public static void main(String[] args) {
    JFrame frame = new Main();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    frame.pack();
    frame.setVisible(true);
  }
}