Filling an array with objects

Question

I need some help with a homework question I am working on. I need to create a "Library" class that contains an array of Song objects.(capacity of 10). Then make a method addSong. Here's what I have so far:

public class Library{

    Song[] arr = new Song[10];

    public void addSong(Song s){
        for(int i=0; i<10; i++)
            arr[i] = s;
    }
}

My question is: Is there another way to fill the array? i will later need to search for a song based on a index value. So i will create a method like: public Song getSong(int idx) Thank you in anticipation for your answers!

Answer 1

If you really have to use an array (and not an ArrayList or LinkedList), this solution may be the right for you:

public class Library{

    private Song[] arr = new Song[10];
    private int songNumber = 0; //the number of Songs already stored in your array

    public void addSong(Song s){
        arr[songNumber++] = s;
    }
}

If you want to avoid a runtime-exeption if you add more then 10 songs:

public void addSong(Song s){
    if(songNumber<10)
    {
       arr[songNumber++] = s;
    }else{
       //what to do if more then 10 songs are added
    }
}