how to set fetchmode type lazy=false by using java. i want property name for this?

forexample for the below property name is "hibernate.dialect".

setProperty("hibernate.dialect", "org.hibernate.dialect.PostgreSQLDialect").

Im not an expert but I believe this is impossible.

Fetch mode is configured for each association inside HBM XML (or inside your class when using annotations)
and cannot be changed at runtime.

Well, if your goal is to dynamically change if a collection is loaded lazily or not, well, I don't know any way of doing it. You can just create a couple of methods. Mark the association as lazy, and then have an eagerFetch method that just calls the getter for the list, which will force a loading of the association, essentially making it eagar when used.