Lazy of the VAVR framework for value and delay calculation

Lazy of the VAVR framework for value and delay calculation Overview: In software development, we often need to delay certain calculations or data, and only actual calculations are performed when needed.The Lazy type of the VAVR framework is a powerful implementation method that can achieve delayed computing and inertia value.This article will introduce the use of Lazy in the VAVR framework for value and delay calculation, and provide the corresponding Java code example. The concept of lazy: Lazy is one of the core components of the VAVR framework, and it provides a way to find an inertial value.In inertial value, it means that the expression or calculation is only required when it is really needed, which can avoid unnecessary calculations and resource waste.The Lazy type is a container that encapsulates a computing logic and automatically calculates it at the first visit. The follow -up access will directly return the calculated results.The Lazy type also provides the characteristics of thread security to ensure the correctness in the multi -threaded environment. Use of lazy: The following is an example of using Lazy type. We use Lazy to create a delayed calculation result: Lazy<String> lazyValue = Lazy.of(() -> expensiveOperation()); In the above code, the method of `Expensiveoperation ()` is a time -consuming calculation logic.Through the Lazy.of method, it is introduced into a SUPPLIER function interface, and we can encapsulate the logic of this calculation as a Lazy type.Note that it is not executed here immediately `Expensiveoperation ()`, but is executed when it is delayed until the real needs. We can obtain the value of Lazy type through the method of `lazyvalue.get ()`.In the first visit, the Lazy type will automatically execute the `Expensiveoperation ()` and cache the result.After the visit, the result of the cache is directly returned to avoid repeated calculations. String result = lazyValue.get(); In addition, if we want to re -calculate each time, we can use the method of `lazyvalue.getOrnull ().This method will clear the cache and re -execute the calculation logic. String result = lazyValue.getOrNull(); Lazy type also provides some other commonly used methods, such as `getorelse ()`, `getorelseget (), and` map () `, etc., used to handle the calculation failure, processing default or value conversion of value conversion. Summarize: The Lazy type of the VAVR framework is a very useful tool that can achieve delayed calculation and inertia value.Calculate the logic of encapsulation and calculate when it is really needed, we can avoid unnecessary calculations and resource waste.Lazy type also provides the characteristics of thread security in a multi -threaded environment.Through the introduction of this article, I believe that you have a deeper understanding of the use of Lazy in the VAVR framework and the use of delay calculations. Please note: The JAVA code example provided herein is for reference only. Please make the corresponding modification and adjustment according to the actual scenario.