crocodile.txt

ssd1 exercise6 以前做的 希望有帮助

Crocodile


1) Behaviors:


      *             Constructor: Create an instance of Crocodile at the specified row and column of the grid.
                     It will be have a certain amount of energy and an age 0. It will belong to the "Crocodile" species.
		     It can be identified by a unique name. The maximum energy it can carry must be set to the maximum energy 
                     allowed for a newborn Crocodile. The minimum energy it needs to stay alive must be set to the minimum energy 
                     required for an Crocodile to stay alive. 

      *             liveALittle. Live a block of time. The Crocodile can swim to random locations within the lake boundary.
                     Crocodile eats catfish if it moves to a location that contains catfish and gains energy.
		     Relinquish necessary energy to swim and to eat and die if the energy falls bellow the minimum required
                     to stay alive. Increase the minumun and maximum energy of the Crocodile. Returns nothing.


      *	die. Update living status to being dead. Returns nothing. 

      *	isDead. Return the living status of the Crocodile as a boolean. 

      *         getRow. Return the row in which Crocodile is located as an integer. 

      *          getColumn. Return the column in which Crocodile is located as an integer. 

      *           getAge. Return the age of Crocodile as an integer. 
	
      *	getName. Return the unique name identifying the Crocodile as a String. 

      *	getImage. Return an image representing the Crocodile. 

      *	getColor. Return the color of the Crocodile as a String. 

      *	getEnergy. Return the current energy level as an integer. 

      *	getDisplayMechanism. Return the mechanism used for displaying the Crocodile, 
                             which is either the name of an image file or a constant defined in the Simulation class. 

      *	getSpecies. Return the species of the Crocodile as a String. 


      *	getMinEnergy. Return the minimum energy needed to stay alive as an integer. 

      *	getMaxEnergy. Return the maximum energy that can be carried as an integer.   

      *	setEnergy. Set the energy level as specified by the integer value passed as a parameter. 

      *	moveToRow. Move the Crocodile to the row specified by the integer value passed as a parameter. 
                   Returns the row where the Crocodile is moved as an integer. 

      *          moveToColumn. Move the Crocodile to the column specified by the integer value passed as a parameter.
                      Returns the column where the Crocodile is moved as an integer. 

      *	getDirection. Check the direction in which the Crocodile is facing. Returns a String. 

      *	isHungry. Check if the current energy level of the Crocodile is less than twice the amount needed for survival. 
                  Returns a boolean. 
      ***** new behaviors inserted below **************************************************    
      *         eat. Returns the energy gained as an integer when eating the catfish specified by the cathfish object passed as a parameter.
      
      *         wade. Move the Crocodile to a random location whitin the lake boundary. Returns nothing
      *            lookForFood. Return a neighboring catfish that is food

2) Instance attributes:

      *	row. Row identifying the location represented as an integer 
      *	column. Column identifying the location represented as an integer 
      *	deadOrAlive. Living status represented as a String 
      *	energy. Current energy level represented as a String 
      *	age. Age represented as an integer 
      *	simulation. Simulation to which the Crocodile belongs 
      *	minEnergy. Minimum energy needed to survive 
      *	maxEnergy. Maximum energy that can be carried 
      *         direction. The direction in which the Crocodile is facing represented as a String 


      Constant instance attributes:

      *	name. Unique name represented as a String 



3)    Class Attributes:


      * nCrocodileCreated. Number of Crocodile created so far represented as an integer 


      Constant Class Attributes:

      *	ALIVE. Status of Crocodile that is alive represented as a String 
      *	DEAD. Status of Crocodile that is dead represented as a String 
      *	SPECIES. Species of Crocodile represented as a String 
      *	BABY_MAX_ENERGY. Maximum energy that can be carried represented as an integer 
      *	BABY_MIN_ENERGY. Minimum energy needed to stay alive represented as an integer 
      * 	RIGHT. Indicate the direction Crocodile is facing represented as String
      * 	LEFT. Indicate the direction Crocodile is facing represented as String
      * 	UP. Indicate the direction Crocodile is facing represented as String
      * 	DOWN. Indicate the direction Crocodile is facing represented as String
      ***** new constant class attributes inserted below *********************************************
      * 	ENERGY_TO_LOOK_FOR_FOOD. Energy needed to look for food represented as integer
      * 	ENERGY_TO_WADE. Energy needed to swim represented as integer
      * 	ENERGY_TO_EAT. Energy needed to swim represented as integer
      * 	AMOUNT_OF_FOOD_IN_FULL_MEAL. Amount of food(energy) that a Crocodile can eat in a full meal representated as integer
      * 	INCREMENT_FOR_MIN_ENERGY. The amount by which the minimun energy a Crocodile requires to stay alive will be incremented by for each time block, represented as integer.
      * 	INCREMENT_FOR_MAX_ENERGY. The amount by which the maximum energy that a Crocodile can store by will be incremented by for each time block, represented as an integer.