Chapter 2, Problem 31P

Program Plan Intro

Ecosystem

Program plan:

• Import the required java packages.
• Create the class Animal,
  • Declare the array variable to fill the river.
  • Declare the constructor.
  • Define the print() function to read the size of river.
  • Define the printl() function to read the length of array.
  • Define the leftMove() function to fill ecosystem of river using bear, fish and null values with the help of random function.
  • Define the rightMove() function to fill ecosystem of river using bear, fish and null values with the help of random function.
  • Define the method check() to check the length of array elements and based on the value it calls the function to fill the ecosystem.
• Define the main() function,
  • Declare the object for random() function.
  • Declare the object for Animal class.
  • Read the input using scanner class.
  • Fill the ecosystem with bear, fish and null values using the random() function.
  • Read the number of time steps.
  • Print the simulation ecosystem after each step.