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ArrayList vs ArrayList

General Tech Bugs & Fixes 2 years ago

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Posted on 30 Aug 2022, this text provides information on Bugs & Fixes related to General Tech. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.

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manpreet Tuteehub forum best answer Best Answer 2 years ago

I am not able to figure out why ArrayList<int> is not allowed but ArrayList<int[]> is allowed. I was under the impression that primitive data types are not allowed in Collections.

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manpreet 2 years ago

Generics only work for reference type (anything that is an Object).

Primitive int isn't a reference type.

int[] is, as any array is also an Object.

The proper way to deal with multiple int values is to either use just int[] (not putting them into lists), or to use List. Which one to pick really depends on your exact use case.


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