Functional Programming in Java, 2nd Edition

Wrapping Up

Lambda expressions aren’t just a language feature; they turn into a powerful yet lightweight design tool. Instead of spending the effort to create a hierarchy of interfaces and classes, we can reuse functional interfaces and pass around lambda expressions and method references where possible. This technique can help us easily create delegates to quickly implement the strategy pattern at both the method and the class level. We can also use lambda expressions to implement the decorator pattern. By turning lambda expressions into controlled workhorses, we can create easy-to-read, fluent interfaces as well as configuration details in code.

In the next chapter we’ll explore a variation of the loan pattern; we’ll use lambda expressions ...