java - Efficiency ? any difference between these codes ?

Question

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Is there a difference between i==0 and 0==i?

What's the benefit of the following coding styles , is there any difference between them ?

int i;

// more code



if (i == 0) {...}

vs

if (0 == i) {...}

Thanks

Answer 1

No difference at all.

I've always found the latter example less readable, and I rarely see it, but some folks seem to like it.

Answer 2

No difference, pick one and stick with it for consistency. The (value == variable) is a relic from older languages where you could accidentally assign a value to a variable in an if (a = 0), instead of (a == 0)

They will both turn into (effectively) the same machine instruction, so there won't be any performance difference at all

Answer 3

効率に違いはありませんが、読みやすさのためにこのスタイルが推奨されます。

if (i == 0) {...}

もう1つのバージョンは、ヨーダ記法if (0 == i) {...}の例であり、プログラミングの誤りと見なされています。リンクからの引用：

「ヨーダ記法」— if（4 == foo）のように、if（variable == constant）の代わりにif（constant == variable）を使用します。「青が空なら」や「背が高いなら男」と言っているようなものだからです。