Java™ How To Program (Early Objects), Tenth Edition

17.12 Wrap-Up

In this chapter, you learned about Java SE 8’s new functional programming capabilities. We presented many examples, often showing simpler ways to implement tasks that you programmed in earlier chapters.

We overviewed the key functional programming technologies—functional interfaces, lambdas and streams. You learned how to process elements in an IntStream—a stream of int values. You created an IntStream from an array of ints, then used intermediate and terminal stream operations to create and process a stream pipeline that produced a result. You used lambdas to create anonymous methods that implemented functional interfaces.

We showed how to use a forEach terminal operation to perform an operation on each stream element. We used ...