#java 8

[mymathematics]

Learn Java 8 Full Tutorial for Beginners

Great document 23 Courses ALL JAVA

[yellowmagicalgirl]

Tfw you know more digits of Pi than Java.

[jakartaee]

Contrast Java and DataWeave transformative capabilities using the map operation. #Java #DataWeave #Java2Mule #MuleSoft @MuleDev @MuleSoft

Contrast DataWeave and Java mapping operations

[getlearntech]

Default Methods in Java 8

Java 8 has introduced the concept of default methods. Default methods in Java enable you to add new functionality to existing interfaces and

[getlearntech]

Top 50 Java 8 coding and programming interview questions and answers

Top 50 Java 8 coding and programming interview questions and answers 2024 : 1) Given a list of strings, find average length? 2) Calculate th

[skills421]

Erase M1 Mac and Reinstall for Java Development

Erase your Mac Choose Apple menu  > System Settings, then click General  in the sidebar. (You may need to scroll down.) Click Transfer or Reset on the right, then click Erase All Contents and Settings. In Erase Assistant, enter your administrator information and click Unlock. Review items that will be removed in addition to your content and settings.If your Mac has multiple user accounts,…

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Java 8 - Functional Interface

Java 8 – Functional Interface

An Interface with exactly one abstract method is called a Functional Interface. This term was first introduced in Java 8. Functional Interface can have only one functionality to exhibit and also known as SAM (Single Abstract Method) Interface. This method is called the Functional Method for that functional interface. Functional Interface can have any number of Default and Static methods, but can…

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[ninjawarrior089]

JAVA 8 Basics

What is functional programming? FP is a paradigm that takes complex computation as the evaluation of mathematical functions (lambda expressions) which makes the code easier to understand, less complex, and reasonable to test. The original Java programming language is based on Von Neumann architecture. The biggest problem of using object-oriented or imperative programming is the mutability and complexity. Functional programming pacifies these problems and works more on expressions than statements. Its concepts are primarily based on immutability (the state cannot be changed) and pure function.

All new desktop and laptop computers are multicore computers. The problem is that a classic Java program uses just a single one of these cores, and the power of the others is wasted. Java 8 facilitates new programming styles to better exploit such computers.

Functions are first-class values.

Java 8 Features

 The Streams API 

A stream is a sequence of data items that are conceptually produced one at a time

Supports many parallel operations to process data.

It avoids the need for you to write code that uses 'synchronized', which is not only highly error prone but is also more expensive on multicore CPUs.

The addition of Streams in Java 8 can be seen as a direct cause of the two other additions to Java 8:

concise techniques to pass code to methods (method references, lambdas)

default methods in interfaces.

 Techniques for passing code to methods

Java 8 adds functions as new forms of value. These facilitate the use of Streams, which Java 8 provides to exploit parallel programming on multicore processors.

File[] hiddenFiles = new File(".").listFiles(File::isHidden);

The function isHidden available, so you just pass it to thelistFiles method using the Java 8 method reference :: syntax (meaning “use this method as a value”);

Analogously to using an object reference when you pass an object around (created by new), in Java 8 when you write File::isHidden you create a method reference,

 Lambdas

Passing methods as values is useful, but it’s a bit annoying having to write a definition for short methods such as isHeavyApple and isGreenApple when they’re used perhaps only once or twice. But Java 8 introduces a new notation (anonymous functions, or lambdas) that enables you to write just

filterApples(inventory, (Apple a) -> "green".equals(a.getColor()) );

or

filterApples(inventory, (Apple a) -> a.getWeight() > 150 );

 Default methods in interfaces

An interface can now contain method signatures for which an implementing class doesn’t provide an implementation. The missing method bodies are given as part of the interface (hence default implementations).

 References:-

https://www.journaldev.com/2389/java-8-features-with-examples