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| Java |
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“Java
Platform, Standard Edition 8 (Java SE 8)” is released on 18th March 2014. Along
with the Java SE 8 platform, the product that implements the platform, “Java SE
Development Kit 8 (JDK 8)” and “Java SE Runtime Environment 8 (JRE 8)” is also
released and available for download.
Java SE 8 was released
in early 2014. In java 8, most talked about feature was lambda expressions. It has
many other important features as well such as default methods, stream API and
new date/time API.
The following list is a highlight of
important features, there are other minor enhancements, security features, bug
fixes are available as part of Java 8.
- Lambda Expressions
- Pipelines and Streams
- Date and Time API
- Default Methods
- Type Annotations
- Nashorn JavaScript Engine
Lambda Expressions
In Java programming language, a Lambda expression (or function) is just
an anonymous function, i.e., a function with no name and without
being bound to an identifier.
Lambda expressions give the ability
to pass functionality as a method argument. Lambda expression helps us reduce
the code clutter in using a single method class.
The basic syntax of a lambda expression is:
either
(parameters) -> expression
or
(parameters) -> { statements; }
or
() -> expression
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Pipelines
and Streams
Another major change introduced Java 8 Streams API, which
provides a mechanism for processing a set of data in various ways that can
include filtering, transformation, or any other way that may be useful to an
application.
Pipelines and streams enrich the Java
collections framework. Pipeline and streams will make our task easier in
accessing the elements from collections and applying operations on it.
Date and Time API
Pre Java 8, date and time-related
operations are a little bit cumbersome. JSR 310: Date and Time API give us a
brand new package java.time package. This will help in handling date and time
operations in an easier way.
Dates
Date the class has even become obsolete. The new classes intended to
replace Date class are LocalDate, LocalTime and LocalDateTime.
1.
The
LocalDate class
represents a date. There is no representation of a time or time-zone.
2.
The
LocalTime class
represents a time. There is no representation of a date or time-zone.
3.
The
LocalDateTime class
represents a date-time. There is no representation of a time-zone.
Default Methods
Default methods give the ability to
add default implementation for methods in an interface. This is a rocking
feature of Java 8. When we implement an interface, if we did not provide an implementation for a method, then the default method will be used in that
place.
Type
Annotations
Before Java 8 Java annotations can be applied to type declarations. From this Java 8 release
onwards, annotations can be applied to type use. Annotations can be applied
wherever a type is used like in new instance creates, exception throws clause
etc. This will help to enforce stronger type checks.
Nashorn JavaScript Engine
Nashorn is a brand new JavaScript
engine provided along with the Java 8 release. Using this we can develop
standalone JavaScript applications in Java. Pre Java 8, we got JDK with a
JavaScript engine based on Rhino. It is developed from scratch. It will
provide better compatibility with ECMA normalized JavaScript specification and
better performance than Rhino.
The above list of Java 8 features is just a highlight if you want to learn more
than Skillyfy is a way to go, it is the rewound IT Training Institute in Delhi,
here you can explore a lot about Java and its Application.
Drop me your questions on this Java 8
tutorial in comments section.
Happy Learning!!
