Exercise Set 4, question 2

// Chapter 2, Exercise Set 4, Question 2
// Demonstrates initializing direction and color
// If you want to initialize all fish to the same
// direction and color, use variables as shown with f1,
// or individualize the fish as with f2 and f3
Direction dir = new Direction("east");
Color col = new Color(200, 50, 50);
Fish f1 = new Fish(env, new Location(2, 2), dir, col);
Fish f2 = new Fish(env, new Location(2, 3),
                   new Direction("west"), new Color(100, 150, 50));
Fish f3 = new Fish(env, new Location(5, 8),
                   new Direction("south"), new Color(50, 50, 100));



The modification shown below implements the suggested changes made in this question. Your students may be much more creative with this exercise.

for ( int i = 0; i < NUM_STEPS; i++ )
{
  if (i % 2 == 0)     // even numbered step
  {
    f1.changeColor(Color.red);
  }
  else
  {
    f1.changeColor(Color.yellow);
  }
  sim.step();
}