Thread: Bluej problem with adding an object from one class to another.

Bluej problem with adding object from another class to a different class?
Hi there i am trying to create a fish tank which has fish and a fish feeder, i have created methods and objects for the fish and the fish feeder. But now i am having trouble trying to create a field in the tank class to store the fish feeder object.

here is the code from the tank class where i am having trouble creating the field for the feeder and also creating code for adding and removing a feeder:

 
 
public class Tank
{
private Fish myFish;
private boolean full;
private FishFeeder newFishFeeder;
 
/**
* Constructor for objects of class Tank
*/
public Tank()
{
full = false;
myFish = null; 
newFishFeeder = null;
}
 
/**
* Add a feeder to the tank
*/
 
public void addFeeder(FishFeeder feeder)
{
if(!full)
{ 
newFishFeeder = feeder;
full = true;
} 
else
{
 
System.out.println("Sorry there is no room in the tank for another feeder");
}
}
 
/**
* Add a fish to the Tank.
* @param fish, the fish to the tank
*/ 
public void addFish(Fish fish)
{
// Can only have one fish
if(!full)
{
myFish = fish; 
full = true;
}
else
{
System.out.println("Sorry there is no room in the tank. It is already occupied and the resident fish will not share. ");
} 
}
 
/**
* Remove the fish - e.g. if it has died.
*/ 
public void removeFish()
{
// Can only remove if there is a fish there
if(full)
{
myFish = null;
full = false;
}
}