Functional Programming in Java, 2nd Edition

Wrapping Up

We managed resources in this chapter. We can’t totally rely on automatic garbage collection, especially when our applications use external resources. The execute around method pattern can help us gain finer control over the flow of execution, and release external resources. Lambda expressions are a good fit to implement this pattern. In addition to controlling the object lifetime, we can use this pattern to better manage locks and to write concise exception tests. This can lead to more deterministic execution of code, timely cleanup of heavyweight resources, and fewer errors.

In the next chapter we’ll use lambda expressions to delay the execution of some parts of code as a way to make the programs more efficient.

Footnotes

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