Lecture Notes on 25 July 2014

public class SubStr
{
  public static void substr (String st)
  {
    int wnd = st.length();
    while (wnd > 0)
    {
      int index = 0;
      while ((index + wnd) <= st.length())
      {
        System.out.println (st.substring (index, index + wnd));
	index++;
      }
      wnd--;
    }
  }

  public static void main (String[] args)
  {
    substr ("ABCD");
  }
}