关于循环内定义变量的问题 - V2EX

关于循环内定义变量的问题 - V2EX

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这是一个创建于 2990 天前的主题，其中的信息可能已经有所发展或是发生改变。

java 里，这两种写法哪种好？

for(String id: idSet){ String key = "FLAG_" + id; ..... } String key; for(String id: idSet){ key = "FLAG_" + id; ..... }

3 条回复 2017-08-23 14:25:15 +08:00

1

Kilerd

2017-08-23 14:11:27 +08:00 via iPhone

显然前者更好

2

yidinghe

2017-08-23 14:18:02 +08:00

还纠结这个？只看可读性。

3

SaulLawliet

2017-08-23 14:25:15 +08:00

你看一下生成的 class 文件, 就知道了.

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