Help me understand when to use Arraylist and when to use Arrays in Java 21

Revision en3, by devcode24, 2024-08-29 12:56:44

So here is the problem I am facing, for the problem --> 1827A - Counting Orders, I am getting AC when using a solution using arrays, and getting a TLE when using ArrayList.

Here are the two solutions: using Array --> 278615778 using ArrayList --> 278616942

So tell me whether I should use ArrayList or Arrays for solving problems because this is not the only problem where I have faced this issue, there were others also.

Can anyone who has experience using Java tell me whether I should use ArrayList or Arrays?

Tags java, tle, array, arraylist

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  Rev. Lang. By When Δ Comment
en3 English devcode24 2024-08-29 12:56:44 4 Tiny change: 'g AC when putting a solu' -> 'g AC when using a solu'
en2 English devcode24 2024-08-29 12:55:39 9 Tiny change: 'ubmission:278615175]\n\nSo te' -> 'ubmission: 278616942]\n\nSo te'
en1 English devcode24 2024-08-29 12:53:26 622 Initial revision (published)