Great Features Java 8

-

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... 

Comments

Post a Comment

Popular posts from this blog

Java LinkedList class in Collection

-
Image
Java LinkedList class in Collection --  LinkedList class uses doubly linked list to store the elements and data. It provide a linked-list data structure.get free coins thetechieking --  It inherits the AbstractList class and implements List and Deque interfaces in java. --  LinkedList class is non synchronized. --  LinkedList class follow insertion order.  --  LinkedList class can allow duplicate elements to store data. --  manipulation is faster than ArrayList because no shifting needs. Declaration of LinkedList class in java : -- public class LinkedList<E> extends AbstractSequentialList<E>    implements List<E>, Deque<E>, Cloneable, Serializable   Constructors of Java LinkedList :  LinkedList()   LinkedList(Collection c) Methods of LinkedList class : 1) boolean add ( Object element ) : -- It appends the element to the end of the list. 2) void add ( int ...
Read more

Spring Boot Features In Java

-
Image
Spring Boot Features Spring Application Web Development Admin features Application events and listeners Externalized Configuration Properties Files YAML Support Type-safe Configuration Security Logging and many more... ⇒ Spring Application           spring application is a class which provides the convenient way to bootstrap a spring application which can be started from main method. You can call start your application just by calling a static run() method. ⇒Web Development         It is well suited Spring module for web application development. We can easily create a self-contained HTTP server using embedded Tomcat, Jetty or Undertow. We can use the spring-boot- starter-web module to start and running applications quickly. ⇒Admin Support      Spring Boot provides the facility to enable admin related features for the application. It is used to access and manage a...
Read more

Java ArrayList class in collections

-
Image
Java ArrayList class in collections --  ArrayList class uses a dynamic array for storing the elements. It inherits AbstractList class and implements List interface in java.  --  ArrayList class can allows random access because array works at  the index basis.  --  ArrayList is non synchronized class in java. --  ArrayList class maintains insertion order to data --  ArrayList can contain duplicate elements. --  manipulation is slow in ArrayList class because a lot of shifting      needs to operation with data.   ArrayList class have three Constructor.    1) ArrayList ( )   2) ArrayList ( Collection c )   3) ArrayList ( int capacity )    Some Methods of  ArrayList class   1) void add ( int index, Object element )    -   insert the specified element at the specified position index in a list.   2) boo...
Read more