Help with toString method and an addObject method?

I have a Room class and an Animal class. A Room can hold 10 Animals. Both rooms and animals have names. I'm having trouble with the Room class's toString method. I want it to return its [the room's] name and the names of all the animals in the room. My addAnimal method in the Room isn't coded well, I can't figure out the correct way to go about it. Originally I was trying to cycle through the array 'animals' with a for loop to put an animal in each slot of the array but my method was giving me errors. The code for that was something like:

public void addAnimal(Animal a){
for(int x=0; x < animals.length; x++){
animals[x] = a;
}
}

That was giving me the incorrect input I wanted, so I tried manually inserting a different Animal object into each slot of the array, 'animals'.

My main class has comments on what should be outputting...

public class Main {
public static void main(String[] args) {
Room myroom = new Room("Bathroom");
myroom.addAnimal(new Animal("Dog"));
myroom.addAnimal(new Animal("Cat"));
myroom.addAnimal(new Animal("Bird"));
String temp = myroom.toString();
//should print nothing on the screen by this point
System.out.println(temp);
//should print on the screen the following:
//Room Snygg 107 populated by:
//Animal Dog
//Animal Cat
//Animal Bird
}
}

Here are my Animal and Room Classes:


public class Animal {
private Room room;
private String name;
String toString;

public Animal(String animalName){
name = animalName;
}

public String getName(){
return name;
}
public String toString(){
return name;
}
}


------------------

public class Room {
private String name;
private Animal [] animals;


public Room(String roomName)
{
name = roomName;
animals = new Animal[10];
}


public void addAnimal(Animal a){

Animal b = new Animal("");
Animal c = new Animal("");
Animal d = new Animal("");
Animal e = new Animal("");
Animal f = new Animal("");
Animal g = new Animal("");
Animal h = new Animal("");
Animal i = new Animal("");
Animal j = new Animal("");
animals[0] = a;
animals[1] = b;
animals[2] = c;
animals[3] = d;
animals[4] = e;
animals[5] = f;
animals[6] = g;
animals[7] = h;
animals[8] = i;
animals[9] = j;



}
public String toString(){
String names = "";
for(Animal animal : animals){
names = animal.toString;
}
return "Room: " + name + ", populated by... \n" + names;
}
}



My current output with this code is:

"Room: Snygg 107, populated by...
null"

Please put your code in [code] tags.

Try reviewing your code to see what it's doing. For example, this method populates the entire array with the same Animal class. You'll need to write a few more lines of code to get the first index in the array that does not have an Animal and put the input Animal into that one slot.

Code :

---

public void addAnimal(Animal a){ // Your method above
     for(int x=0; x < animals.length; x++){
          animals[x] = a;
     }
}

---

For your toString method, try something like this:

Code :

---

public String toString() {
     String output = "";
     int i = 0;
     while ( i < animals.length ... ) { // loop through the animals array and check if this index has an animal
           // Add the name to the output value
           // don't forget your line breaks
     }
 
    System.out.println("Room " + this.name + " contains: " + output);
}

---