porblamas para quitar errores de programa java

ejaimego
03 de Noviembre del 2007
MI PROBLEMA ES QUE NO PUEDO DETECTAR LO ERRORES DE ESTE PROGRAMA AL COMPILAR: SONTRES ERRORES LOS QUE ME MARCA, EL PROBLEMA QUE INTUYO QUE ES AL IMPORTAR LAS CLASES, POR QUE EN DONDE ME APARECEN LOS ERRORES ES EN SIMULATION Y LIVINGBEING:
import java.util.*;
/*
* Created on October 28, 2007
*
*/

/**
* Basic Catfish - simulates a catfish - can swim and consume
* energy in the process.
*
* @author Edgardo Jaime Gonzalez
*
*/
public class Catfish extends LivingBeing {

/**
* The catfish is born "alive".
* Then it dies, becoming a corpse.
*/
private String ALIVE = "alive";


/**
* The catfish is born "alive".
* Then it dies, becoming a "dead" corpse.
*/
private String DEAD = "dead";



/**
* Energy needed to swim in a block of time.
*/
private int ENERGY_TO_SWIM = 2;



/**
* Row-wise location of the catfish
*/
private int row;


/**
* Column-wise location of the catfish
*/
private int column;


/**
* Image of the catfish - is really a filename
*/
private String imageFileName;


/**
* Is the catfish dead or alive?
*/
private String deadOrAlive;


/**
* Age expressed as blocks of time lived
*/
private int age;
private int energy;


/**
* The simulation to which this catfish belongs.
* This is needed so the catfish can send a message
* to simulation.
*/
private Simulation simulation;



/**
* Constructor. Initialize a catfish to start life at a specified
* location with a specified energy. If location is out of bounds,
* locate the catfish at the nearest edge.
*
* @param initialRow - the row at which the catfish is located
* @param initialColumn - the column at which the catfish is located
* @param initialSimulation - the simulation that the catfish belongs to
*/
public Catfish(
int initialRow,
int initialColumn,
Simulation initialSimulation) {

simulation = initialSimulation;

deadOrAlive = ALIVE;

age = 0;
energy = 10;

imageFileName = "/Catfish-right.gif";

row = initialRow;
column = initialColumn;
}

/**
* Get the row at which the catfish is located
*
* @return - the row of the catfish\'s location.
*/
public int getRow() {
return row;
}

/**
* Get the column at which the catfish is located
*
* @return - the column of the catfish\'s location.
*/
public int getColumn() {
return column;
}


/**
* get filename of catfish image
*
* @return filename of Catfish image
*/
public String getImage()
{
return imageFileName;
}


/**
* Get the catfish\'s age
*
* @return the age of the catfish expressed in blocks of time
*/
public int getAge() {
return age;

// Student:Please complete this method.
}


/**
* Get the energy of the catfish
*
* @return current energy level of the catfish
*/
public int getEnergy() {
return energy;

// Student:Please complete this method.
}


/**
* Die: The Catfish dies.
*/
public void die() {



// Student:Please complete this method.

// Set the deadOrAlive attribute to indicate that the catfish is dead.
}



/**
* Is the catfish dead?
*
* @return <code>true</code> if dead. <code>false</code>, otherwise.
*/
public boolean isDead() {


if(deadOrAlive == DEAD)
return true;
else
return false;
}



/**
* Swim to a new location if possible.
* Consumes some energy.
*/
private void swimIfPossible() {


// Student:Please complete this method.


// Consume ENERGY_TO_SWIM units of energy to swim.


// Check if there is any energy left after consumption.


// Swim at random in one of four directions.
// Assign a random row location for the Catfish as follows.
//
// (1) Send the "getRand" message to the "simulation" object to get a random number generator.
// The "simulation" object is initialized in the constructor above.
// (2) Send the "nextInt" message to the random number generator obtained above.
//
// The "nextInt" behavior returns an integer between 0(inclusive) and the integer specified as a parameter(exclusive).
// Thus, specifiying a value of 10 to the "nextInt" behavior will return an integer between 0 and 9.
//


// Similarly, assign a random column location for the catfish

}



/**
* Catfish lives its life. Dies if it has no energy left.
*/
public void liveALittle() {

// Student:Please complete this method.

// If there is no energy left, send a "die" message to this catfish


// Increment the age of the Catfish by 1

// Try to swim by sending a "swimIfPossible" message

}

}