Chapter 3. Lambda expressions

This chapter covers

  • Lambdas in a nutshell
  • Where and how to use lambdas
  • The execute-around pattern
  • Functional interfaces, type inference
  • Method references
  • Composing lambdas

In the previous chapter, you saw that passing code with behavior parameterization is useful for coping with frequent requirement changes in your code. It lets you define a block of code that represents a behavior and then pass it around. You can decide to run that block of code when a certain event happens (for example, a button click) or at certain points in an algorithm (for example, a predicate such as “only apples heavier than 150 g” in the filtering algorithm or the customized comparison operation in sorting). In general, using this concept ...

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