Demonstrate delte() and deleteCharAt

//Demonstrate delte() and deleteCharAt

public class Main {
public static void main(String[] args) {

  StringBuffer sb =new StringBuffer ("This is a test.");
  
  sb.delete (4, 7);
  System.out.println ("after delete");
  
  sb.deleteCharAt (0);
  System.out.println ("after deleteCharAt");
  

}
}