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Functional Interfaces

Lambda Expressions

Method Reference

An interface that contains only one abstract method is known as a functional interface, but there is no restriction, you can have n number of default and static methods inside a functional interface.

Java 8 Features – Complete Tutorial

Java 8 is the most awaited release of Java programming language development because, in the entire history of Java, it never released that many major features. It consists of major features of Java. It is a new version of Java and was released by Oracle on 18 March 2014. Java provided support for functional programming, new Java 8 APIs, a new JavaScript engine, new Java 8 streaming API, functional interfaces, default methods, date-time API changes, etc.

Major Java 8 Features Introduced

There are a few major Java 8 features mentioned below:

  • Lambda Expressions: Concise functional code using ->.
  • Functional Interfaces: Single-method interfaces.
  • Introduced and Improved APIs:
    1. Stream API: Efficient Data Manipulation.
    2. Date/Time API: Robust Date and Time Handling.
    3. Collection API Improvements: Enhanced Methods for Collections (e.g., removeIf, replaceAll).
    4. Concurrency API Improvements: New classes for parallel processing (e.g., CompletableFuture).
  • Optional Class: Handle null values safely.
  • forEach() Method in Iterable Interface: Executes an action for each element in a Collection.
  • Default Methods: Evolve interfaces without breaking compatibility.
  • Static Methods: Allows adding methods with default implementations to interfaces.
  • Method References: Refer to methods easily.

This Tutorial covers all the important Java 8 features like Java 8 APIs, Java arrays, Java 8 ArrayList, and many more included in the Java 8 programming language.

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Java 8 Features

Lambda Expressions Functional Interfaces Method Reference Streams Comparable and Comparator Optional Class Date/Time API Miscellaneous...

Lambda Expressions

Lambda Expression basically expresses an instance of the functional interface, in other words, you can say it provides a clear and concise way to represent a method of the functional interface using an expression. Lambda Expressions are added in Java 8....

Functional Interfaces

An interface that contains only one abstract method is known as a functional interface, but there is no restriction, you can have n number of default and static methods inside a functional interface....

Method Reference

Method reference is a shorthand notation of a lambda expression to call a method. There are four types of method references that are as follows:...

Streams

Stream API is introduced in Java 8 and is used to process collections of objects with the functional style of coding using the lambda expression. So to understand what stream API is, you must have knowledge of both lambda and functional interfaces....

Java Stream Programs

Java Streams provide a powerful and expressive way to process sequences of elements in Java, enabling functional-style operations on collections of data. The Stream API, introduced in Java 8, facilitates efficient data manipulation and transformation using a sequence of operations that can be performed in parallel or sequentially...

Java Stream Methods

Methods related to one of the most powerful features of Java Stream are mentioned below....

Comparable and Comparator

Comparable and Comparator are interfaces used to order objects. They are particularly useful in sorting operations and collections that require natural ordering. Here we will learn about Comparable and Comparator in depth....

Optional Class

Java 8 Optional Class Optional ofNullable() Method in Java with Examples Optional orElse() Method in Java with Examples Optional ifPresentOrElse() Method in Java with Examples Optional orElseGet() Method in Java with Examples Optional filter() Method in Java with Examples Optional empty() Method in Java with Examples Optional hashCode() Method in Java with Examples Optional toString() Method in Java with Examples Optional equals() Method in Java with Examples Optional stream() Method in Java with examples Optional or() Method in Java with Examples Optional get() Method in Java with Examples Optional isPresent() Method in Java with Examples Optional orElseThrow() Method in Java with Examples Optional of() method in Java with Examples...

Date/Time API

This section gives you to handle the ever-changing world of dates and times within your Java programs. Explore working with calendars, timestamps, and time manipulation – essential skills for building applications that deal with deadlines, scheduling, or even historical data analysis....

Miscellaneous

Java is a versatile and powerful programming language that encompasses a wide range of features and tools, enabling developers to build robust, high-performance applications. Let us learn some Java Miscellaneous topics are mentioned below:...

Conclusion

Java 8 has brought many exciting features that make it a powerful tool for developers. With the introduction of Lambda expressions, Stream API, and new Date and Time API, Java 8 has improved code efficiency and readability. These Java 8 features allow developers to write more flexible and concise code, making their work easier and more enjoyable. Overall, Java 8 continues to be a valuable update that has significantly enhanced the Java programming language....

Java 8 Features – FAQs

Q1: What are the features of java8?...

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Lambda Expressions

Method Reference