What's New in Java 8

I posted a post with title 'What's New in Java 7', so I am posting the same for Java 8 also but I will post separate on each new feature of Java 8, this post is something introduction of Java 8  features, will discuss each feature separate with detailed examples and usages of the feature.

Java 8  Features:

• Lambda Expressions: These are the expression like any other expressions and enable us to treat functionality as a method argument, or code as data. Lambda expressions let us express instances of single-method interfaces more compactly. These single abstract method interfaces are also called as functional interfaces. Here you may get one question, Why It is being specified  abstract method though all methods in interface are abstract. Well, these functional interfaces may have implemented methods they are called  default (new feature in java 8).

• Default Methods: As we discussed  Default methods are methods in an interface that have an implementation. They enable new functionality to be added to the interfaces of libraries. New Package has been added for this functional interfaces to library 

• Aggregate Operations: Aggregate operations  enable us to perform functional-style operations on streams of elements, in particular, bulk operations on collections, such as sequential or parallel map-reduce transformations. New methods and inter faces added in collection frame work.

• Date-Time APIs: These new APIs enable us to represent dates and times and manipulate date and time values. They support the International Organization for Standardization (ISO) calendar system as well as other commonly used global calendars.

There are other features added to Java 8 like type annotations, enhanced security etc. But I will be discussing above four features in detail.  In my  next post I will discuss Lambda Expressions.