Java String array not working. Code included

Question

public static void main(String[] args) {
    int LENGTH=0;
    int currentSize=0;
    String[] albumArray = new String[LENGTH];

    Scanner sc = new Scanner(System.in);

    System.out.println("How many tracks are in your album?");
    LENGTH=sc.nextInt();
    System.out.println("Thanks.");
    System.out.println("Please enter " + LENGTH + " track names to add to the album: ");

    //Prompts user to enter values until the array is filled. Repeats until filled.
    while (currentSize < LENGTH){
        System.out.print("Enter track name "+(currentSize+1)+":\t");
        albumArray[currentSize] = sc.nextLine();
        currentSize++;
    }

    for (int i =0; i<LENGTH;i++){
        System.out.println(albumArray[i]);
        System.out.println();
    }

}

}

Okay, so basically this program allows the user to create an album. The user sets the number of tracks (LENGTH) in the array, and then assigns a String value to each index in the array.

I'm getting an error under line 18

"albumArray[currentSize] = sc.nextLine();"

Does anyone know what I'm doing wrong here? thanks in advance.

i believe one of your problem is you are creating 0 lenght array, and then you are trying to add items to it — user902383
– user902383, Commented Apr 7, 2015 at 11:49
String[] albumArray = new String[LENGTH]; put this line after taking length — Pratik
– Pratik, Commented Apr 7, 2015 at 11:49
Sorry. This is the error "Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0 at AlbumCreatorArray.main(AlbumCreatorArray.java:18)" — Nemo
– Nemo, Commented Apr 7, 2015 at 11:49

weston · Accepted Answer · 2015-04-07 11:48:50Z

5

int LENGTH=0;
int currentSize=0;
String[] albumArray = new String[LENGTH]; //can't do this yet, LENGTH is still 0

Scanner sc = new Scanner(System.in);

System.out.println("How many tracks are in your album?");
LENGTH=sc.nextInt();

You need to create the array after you know the length.

int LENGTH=0;
int currentSize=0;

Scanner sc = new Scanner(System.in);

System.out.println("How many tracks are in your album?");
LENGTH=sc.nextInt();
String[] albumArray = new String[LENGTH];

answered Apr 7, 2015 at 11:48

weston

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Sachin Gupta · Accepted Answer · 2015-04-07 11:49:33Z

0

you are initializing albumArray as zero length. Please initialize it after taking input from user.

answered Apr 7, 2015 at 11:49

Sachin Gupta

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