public method

[dirtycash]

how would i go about answering the following question -


1. findVacantRoom has no parameters and returns an integer value representing the room
number of a vacant room. Remember that the getOccupier method of a Room will return
null when a room is vacant. Room zero will be occupied first, then room 1, then room
2 and so on. This method will return the first vacant room, so if rooms 0, 1, 2 and 4 are
occupied, findVacantRoom will return 3 which is the number of the first vacant room.
The method must return -1 if the hotel is full and there are no vacant rooms.

[ShoeNinja]

I'm making a few assumptions before doing this. They are:
1. The rooms are stored in an array.
2. The rooms are stored as Room objects.
3. getOccupier returns a String

Code:

public int findVacantRoom(){

for(int i = 0; i < rooms.length; i++){

if (rooms[i].getOccupier() == null){
    return i;
}
}
return -1;
}

Essentially what this does is checks all of the rooms in the room array starting at zero. When a vacant room is encountered, the array index of that room is returned. (You might have to return something like rooms[i].roomNumber if the room numbers do not correspond to the array index.) If the for loop completes without finding a vacant room, -1 is returned.

Again, if my assumptions aren't true than this might not work. Regardless of how the data is stored, the idea is the same though.

Good luck.

[dirtycash]

it says it cannot find variable length?



thanks for the reply

[ShoeNinja]

That was written assuming that the rooms were going to be stored in an array. If they are stored another way, (vector, ArrayList...) you will have to modify the code.

[dirtycash]

ive fixed it now thanks for your help