What are the possible values of load_on_startup in a servlet entry on web.xml?

Obviously, load_on_startup value of 0 means don't, and 1 means do. But what does a value of 2 mean?

EDIT: Obviously, I shouldn't assume things before I check them. A value of 0 still means load on startup. Thanks stacker.

The servlet sp开发者_开发知识库ecification is surprisingly hard to reach.

(Here's where I saw 2 as a possible value).

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load-on-startup

can specify an (optional) integer value. If the value is 0 or greater, it indicates an order for servlets to be loaded, servlets with higher numbers get loaded after servlets with lower numbers.

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It defines the order in which the container loads the servlet. The servlet is not loaded until a request tries to access it.

The container starts the servlet in ascending order of the load on defined startup value (1 before 2, 2 before 5 and so on.)