java 8 functional programming

Original December 25, 2016 10:02:52 Label: Functional Programming/ Java 3250 Describes the:supplierSource:public interface Supplier/** * Gets a result. * * @return a result */ T get();} 1 2 3 4 5 6 7 8 9 Test code:@Te

Programming | Function Note: When you read this article, I hope you can understand and understand the Java Generic (paradigm). Note: In the FP for Javaparty this weekend, many people seem to have no interest in FP and think that the FP in Java is not very useful. In fact, this is a very large concept of error, paradigm of the development of

This series of articles translates from functional programming in Java Venkat Subramaniam Chapter II: The use of collections We often use a variety of collections, numbers, strings, and objects. They are everywhere, even if the code to operate a set can be slightly optimized, it can make the code a lot clearer. In this chapter, we explore how to use lamb

serial and difficult to parallelization.2. Such a cycle is not polymorphic; the income is the demand. Instead of using a method (which supports polymorphism) to perform a specific operation, we pass the collection directly to the for loop rather than to the collection.3. From the design level, the code written in this way violates the "Tell,don ' t ask" principle. Instead of leaving the iterations to the underlying library, we ask for an iteration to execute. It's time to switch from the old i

collection returned by Pollevents to a Java 8 stream and then used its internal iterator to print out detailed updates for each file. Let's run this code and then modify the Sample.txt file in the current directory to see if the program can detect the update. Copy Code code as follows: The "any" file changed within next 1 minute ... Sample.txt When we modify this file, the pro

Conversion of lists Converting a collection into a new set is as simple as traversing it. Let's say we want to convert the names in the list to uppercase. Let's see what we can achieve. The string in Java is immutable, so it cannot be changed. We can generate new strings to replace the elements in the list. In this case, however, the original list is gone; there is a problem, the original list may also be immutable, such as Arrays.aslist () generate

Web programming is functional programming Everyone who has long programmed for both worlds, that is he has developed local applications and programmed for web, will tell you that web programming is very different from classical application development. and it's not just the program