Why use the static keyword when defining methods

First, let's talk about the benefits of static methods ：

Used static After keyword method , This method is loaded into memory when the class is loaded and only loaded once

When using, you only need to access through the class name , There is no need to consume resources again to create

So when does it end , The memory will not be released until the end of the program

If the method is not applicable when it is created static What about keywords

If the method created is not static When decorating, the inventory duration of this method starts and ends with the call , And directly be JVM Recycling

secondly ：

When to use static

If this method is used as a tool class , Declare as static, Unwanted new A formation used

Private methods defined in normal development still do not need to be declared static Of