Increase array size, large enough to hold another array

Question

I am having trouble trying to figure out how to increase size a of an array A so that A has a large enough buffer at the end to hold an array B.

Assuming the two sorted arrays are A = {1, 3, 5} and B = {2, 4, 6, 8}

A = {1, 3, 5, 0, 0, 0, 0} and B = {2, 4, 6, 8} where A has buffer {0, 0, 0, 0} at the end to hold B

Possible duplicate of Variable length (Dynamic) Arrays in Java — Pierre
– Pierre, Commented Mar 31, 2016 at 11:18

Community · Accepted Answer · 2017-05-23 12:24:08Z

2

You cannot resize an array, you have to either construct a new array with the size of both arrays combined, or use another data structure (e.g. ArrayList).

Also see: Make copy of array in Java

edited May 23, 2017 at 12:24

CommunityBot

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answered Mar 31, 2016 at 11:09

Dimitrios Begnis

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Paolo Bernardi · Accepted Answer · 2016-03-31 12:26:39Z

2

If you are using a literal array you have no chance of increasing its size in place. You must create a new array and copy A over it, perhaps by using System.arrayCopy.

edited Mar 31, 2016 at 12:26

answered Mar 31, 2016 at 11:09

Paolo Bernardi

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