Review or while loops, using the static method showInputDialog() from the JOptionPane class, and String processing basics.
Click RELOAD or REFRESH to try it a 2nd time. Its much faster the 2nd time. 10/08/2002

/* Tuesday, October 8th, 2002 - good review of while loops

   Background material for this example is from Big Java textbook

   Pages 107-109 Section 3.7 Strings 
   Pages 110-112 Section 3.8 Reading Input                     */

import javax.swing.JOptionPane;
import objectdraw.*;
import java.awt.*;

public class ReadInputTest extends WindowController
{
   private final static String prompt = "Enter the name of your favorite movie:";

   private int yPosition;

   public void begin()
   {
      new FilledRect(0, 0, 400, 550, canvas).setColor( Color.yellow );

      yPosition = 10;
      String str;

      String theMovieName = JOptionPane.showInputDialog(prompt);
      int n = theMovieName.length();

      int i = 1;                                      for (int i = 0; i < n; i++)
      while (i <= n)                                  {
      {                                                  str = "";
         str = theMovieName.substring(0, i);             for (int j = 0; j <= i; j++)
         printString(str);                               {
         i++;                                               str = str + " ";
      }                                                  }
                                                         str = str + theMovieName.substring(i, i + 1);            
                                                      }
      i = n;
      while (i > 0)
      {
         printString( theMovieName.substring(0, i) );
         i--;
      }
  }

  private void printString( String str )
  {
     Text t = new Text(str, 40, yPosition, canvas);
     t.setFont("Courier New");
     t.setColor( Color.blue );
     t.setBold();
     yPosition += 14;
  }
}