(Case Study) Create a RandomBug class that extends the Bug class in GridWorld. In this ext...

(Case Study) Create a

RandomBug

class that extends the

Bug

class in GridWorld. In this extended class, override the

move

method inherited from

Bug.

Do this by copying the code from

Bug’s move

method and then replacing the code fragment that creates flowers and deposits them in the bug’s wake with a

setDirection

call that randomly selects one of the directions, 0, 45, 90, 135, 180, 225, 270, or 315. Get a random value the same way that

GridWorld

gets a random value for a bounded grid in the

World

class’s

getRandomEmptyLocation

method. But instead of using

generator.nextInt (emptyLocs.size())

use

45 * generator.nextint (8)

Also create a

RandomBugRunner

class to exercise your new

RandomBug

class. In this class’s

main

method, instantiate an

ActorWorld

object called world. Then have

world add

ten

RandomBug

objects, and then have

world

call its

show

method.

Executing

RandomBugRunner

should generate a display similar to that in Figure, except this time there will be ten randomly located bugs and no rock. Push the

Step

button a few times to see how the bugs move. Then click

World > UnboundedGrid,

adjust the sliders on the sides to move the cluster of bugs to the center of the larger display, click

Run,

and watch the bugs gradually spread apart as time passes.

Figure Tree class-part A.

This class provides the model. It describes the components whose behavior the program simulates.

Figure Tree class-part B.

The drawBranches method defines the recursion that describes a tree at any one time.