Great Features Java 8

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Great Features Java 8


Oracle released a new version of Java as Java 8 in March 18, 2014. It was  revolutionary release of the Java for software development platform. It includes various upgrades to the Java programming, JVM, Tools and libraries.

 

Java 8 Programming Language

Java 8 provides following features for Java Programming:

  • Lambda expressions,
  • Method references,
  • Functional interfaces,
  • Stream API,
  • Default methods,
  • Base64 Encode Decode,
  • Static methods in interface,
  • Optional class,
  • Collectors class,
  • ForEach() method,
  • Parallel array sorting,
  • Nashorn JavaScript Engine,
  • Parallel Array Sorting,
  • Type and Repating Annotations,
  • IO Enhancements,
  • JDBC Enhancements etc. 

    Lambda Expressions

          Lambda expression helps us to write our code in functional style. It provides a clear and concise way to implement SAM interface by using an expression. It is very useful in collection library in which it helps to iterate, filter and extract data.


    Functional Interface

          An Interface that contains only one abstract method is known as functional interface. It can have any number of default and static methods. It can also declare methods of object class.
    Functional interfaces are also known as Single Abstract Method Interfaces.

    Optional Class

         Java introduced a new class Optional in Java 8. It is a public final class which is used to deal with NullPointerException in Java application. We must import java.util package to use this class. It provides methods to check the presence of value for particular variable.

    forEach Mehod

         Java provides a new method forEach() to iterate the elements. It is defined in Iterable and Stream interfaces.
    It is a default method defined in the Iterable interface. Collection classes which extends Iterable interface can use forEach() method to iterate elements.
    This method takes a single parameter which is a functional interface. So, you can pass lambda expression as an argument.

    New Date/Time API

         Java has introduced a new Date and Time API since Java 8. The java.time package contains Java 8 Date and Time classes.

    Stream API (Major Feature)

        Java 8 java.util.stream package consists of classes, interfaces and an enum to allow functional-style operations on the elements. It performs lazy computation. So, it executes only when it requires.


    Stream Filter

        Java stream provides a method filter() to filter stream elements on the basis of given predicate. Suppose, you want to get only even elements of your list, you can do this easily with the help of filter() method.
    This method takes predicate as an argument and returns a stream of resulted elements.

    any many more...

    referanced by  JavaTpoint.com 

    thank you... 

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