Find common elements among N lists of byte arrays in Java

Question

I have a declaration as List<List<byte[]>>, i.e. inner list is list of byte arrays and there are N such lists. I want to identify common byte arrays across all the lists. How would I do that? There is a discussion here, but I donot know if it works for byte arrays

Why don't you check first it's working or not? – Eklavya Jul 26 '20 at 06:57 — Eklavya, Jul 26 '20 at 06:57

score 0 · Answer 1 · answered Jul 26 '20 at 06:45

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You can use equals(byte[] a, byte[] a2), as suggested here.

answered Jul 26 '20 at 06:45

Calaf

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score 0 · Accepted Answer · answered Jul 26 '20 at 06:55

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Use the solution you've linked, but as arrays don't have hashCode overriden, you have to wrap them in ByteBuffer, using ByteBuffer.wrap. To extract the array from a ByteBuffer, call array on it.

answered Jul 26 '20 at 06:55

Andrew Vershinin

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Find common elements among N lists of byte arrays in Java

2 Answers2