高洛峰2017-04-17 17:39:41
Unused imports have no impact on performance. For details, please refer to the Java Virtual Machine Specification
ringa_lee2017-04-17 17:39:41
The reason why I clean up is because I feel unhappy when I see warnings and have obsessive-compulsive disorder tendencies.
大家讲道理2017-04-17 17:39:41
It doesn’t matter, for the simplicity of code use ctrl + shit + o
you can import necessary packages and delete unnecessary packages