execise4
........\catfish-bounded-move
........\....................\Catfish.java.bak
........\....................\class
........\....................\.....\Catfish.class
........\....................\.....\HtmlAnchor.class
........\....................\.....\HtmlImage.class
........\....................\.....\HtmlPage.class
........\....................\.....\HtmlTable.class
........\....................\.....\Simulation.class
........\....................\.....\SimulationServlet.class
........\....................\.....\SimulationView.class
........\....................\content
........\....................\.......\blank.gif
........\....................\.......\CatFish-tired.gif
........\....................\.......\CatFish.gif
........\....................\.......\CreateFish.html
........\....................\.......\right-arrow.gif
........\....................\work
........\....................\....\Catfish.class
........\....................\....\Catfish.java
........\....................\....\Catfish.java.bak
........\catfish-bounded-move.zip