CODEWITHSUNDEEP
javaarraysmultidimensional-array
Silmar
Silmar

Reputation: 25

Multidimensional Array given the dimensions

How can I make an array given the dimensions introduced by user??

For example, if you introduced 5(the dimensions) inside of that array we need an array of 4 dimensions, inside of it 3 dimensions and etc...

Please help!

Upvotes: 1

Views: 80

Answers (2)

Alex - GlassEditor.com
Alex - GlassEditor.com

Reputation: 15497

You could use Array#newInstance

int[][][] ar = (int[][][]) Array.newInstance(int.class, 3, 2, 1);
System.out.println(Arrays.deepToString(ar));

or

int[] dimensionLengths = new int[numberOfDimensions];
Arrays.fill(dimensionLengths, 1);
Array.newInstance(int.class, dimensionLengths);

Upvotes: 2

Eran
Eran

Reputation: 393781

Since an array is an Object, an array of Object (Object[]) can itself hold arrays, and so on. This would require a lot of castings, and would be very un-type-safe and ugly, but it can be done.

For example :

 Object[] arr3d = new Object[10];          // create the first dimension
 arr3d[0] = new Object[20];                // create the second dimension
 ((Object[])arr3d[0])[0] = new Object[30]; // create the third dimension
 ...

I wouldn't recommend actually doing it, though.

Upvotes: 0

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