In computer programming, lazy initialization is the tactic of delaying the creation of an object, the calculation of a value, or some other expensive process until the first time it is needed. It is a kind of lazy evaluation that refers specifically to the instantiation of objects or other resources.

What is lazy initialization in Java?

The Lazy Initialization technique consists of checking the value of a class field when it's being used. If that value equals to null then that field gets loaded with the proper value before it is returned. Here is the example : // Java program to illustrate.

Is lazy initialization good?

Lazy initialization is primarily used to improve performance, avoid wasteful computation, and reduce program memory requirements. These are the most common scenarios: When you have an object that is expensive to create, and the program might not use it.