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Editorial Team
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Asked: 2026-05-24T01:09:07+00:00

I have read that making something final and then using it in a loop

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I have read that making something final and then using it in a loop will bring better performance, but is it good for everything? I have lots of places where there isnt a loop but I add final to the local variables. Does it make it slower or is it still good?

Also there are some places where I have a global variable final (e.g. android paint), does it mean I don’t have to make it a local final when using it in loops?

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  1. Editorial Team

    The first thing you should consider is; What is the simplest and clearest way I can write this code. Often this performs well.

    final local variables is unlikely to affect performance much. They can help clarity when you have long methods, but I would suggest breaking up method is a better approach.

    final fields can affect performance to small degree, but a better reason to make it final is to make it clear that this field never changes (which also helps the JIT)

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