What is the difference between get() and load() in Hibernate?
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In Hibernate, both get() and load() are used to retrieve objects from the database using their primary key, but they behave differently in how they fetch and handle data.
The get() method always hits the database immediately and returns the actual object. If the requested record does not exist, it returns null, making it safe when you are not sure whether the entity is present. It provides eager fetching, meaning the object and its data are fully initialized at the time of the call. This makes it more predictable but slightly less efficient when you do not always need the data right away.
On the other hand, the load() method returns a proxy object without immediately accessing the database. The database call happens only when a property of the object is accessed, which is known as lazy initialization. If the record does not exist, calling load() does not return null; instead, it throws an ObjectNotFoundException at the point when data is accessed. This behavior can improve performance by delaying database interaction, but it may cause runtime issues if not handled carefully.
In short, use get() when you want the object right away and are fine with null if absent, and use load() when you want lazy fetching and are certain the entity exists.
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