1. The constructor for the Frog class needs to have as one of its 
    arguments the Image that you want to use for the frog.

    The getImage() function must be done from a class that extends
    WindowController.   It would be nice if we could getImage() from
    within the Frog class constructor, but we cannot easily do that.
    Thus the Image is obtained in the Frogger client program and then
    passed to the Frog constructor.

 2. Step #2 (see page 5) can be broken down further:

    Step #2 Write the Frog class except for the kill and reincarnate methods.

          a.  Write the Frog constructor and then test it.  When you 
              compile and run the program, you should now see 
              the Frog in its starting position.  Adjust the arguments
              of the call to the Frog constructor in the Frogger class
              until your Frog is where you want it to be at the start.

          b.  Write the hopToward() method for the Frog class and then
              test it by modifying the Frogger class onMousePress()
              public method. 
    
              When you finish writing the hopToward() method, be sure
              that your Frog jumps to the middle of each lane and to
              the shoulder of the road.  Also make sure it goes to the
              start of the road (left side) and the end (right side) of 
              the highway okay and in a reasonable position.
         
          c.  At this point, I have NOT written the overlaps(), the 
              reincarnate(), the isAlive() or the kill() methods
              for the Frog class.  However, I have a good start with
              the project.  During class discussions on Monday and 
              Wednesday, I will understand more of what is being said
              about any Frogger project issues because I am already
              working on it and more deeply familiar with it.

          d.  If you have not written and tested this much of the program 
              by Monday, you are starting way too late on the project.  
              Do NOT try to do the project all in a couple of days, 
              unless those couple days are 4 or 5 days BEFORE the due date.

              Too many students were working on part 1 of the Boxball
              game project on Wednesday or Thursday of last week.
              Don't make that mistake again.

  3. At this time, I see no need to require the Vehicle class to 
     record the length of the pause().  Note that pause(30) means
     pause AT LEAST 30 milliseconds.  What if a pause is 45 milliseconds
     instead of 30?  Then the car moving at a speed of 4 units needs
     to move 6 units instead of 4 units to maintain its normal speed.

     Save the current time. (Get the current time by calling getTime()). 
     IGNORE THE ABOVE LINE FOR NOW...

     pause for (at least) 30 milliseconds. 

     Determine how long it actually paused for (e.g., subtract the time 
     saved earlier from the current time) and move the appropriate distance. 
     (Remember your equation from physics: rate * time = distance.) 
     IGNORE THE ABOVE THREE LINES FOR NOW...

     You need to do this to ensure smooth motion of your vehicles. 
     With so many active objects, the computer cannot ensure that the length 
     of pauses will be very precise. 
     IGNORE THE ABOVE THREE LINES FOR NOW...

     Find out if the vehicle squished the frog and kill the frog with the 
     kill method if it did. 


  4. Here are my test statements for page 5, step #5 which "Test the 
     Vehicle class by having the begin method in the Frogger class ..."

      Image carImage = getImage("oldcar_right.gif");
      Image taxiImage = getImage("taxi_right.gif");
      Image vanImage = getImage("van_right.gif");

      new Vehicle( carImage, new Location(50, 125), 4, 600, frog, canvas);
      new Vehicle( taxiImage, new Location(50, 215), 1, 600, frog, 
                                                                  canvas);
      new Vehicle( vanImage, new Location(50, 325), 2, 600, frog, canvas);
      new Vehicle( carImage, new Location(50, 425), 3, 600, frog, canvas);