Java 8 - New Updates and Why It Matters?

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Java 8 – Why it matters?

- Jean-François Bilodeau (Senior Instructor)

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The Smarter Everyday project is owned and operated by CTE Solutions Inc.

Java 8 – Why it matters?

- Jean-François Bilodeau (Senior Instructor)

What's new?

New language features

New library features

Under the hood improvements

New Language Features

Lamdba expressions

Annotation Improvements

Default methods

Lambda Expression

Finally! (Most requested feature after generics)

Treat functions as data

Annotations Improvements

Annotations can be used with any type declaration

• Allows deeper integration with compile-type verification

• Can be used with new operator, type cast, throws keyword, etc.

Annotations can be repeated

• Use the Repeatable annotation when declaring

Default Method

Allows for extending an interface without breaking existing code

As a consequence, allows multiple inheritance

Other Language Features

Parameter name reflexion• Need to compile with -parameters

option

Improved type inference for generics

New Library Features

Rehauled collections & Streams

Date-Time Package

Unsigned integer arithmetics

Streams

Java 8 provides functional-style operation on collections

Provides sequential or parallel map-reduce transformations

New package: java.util.stream

Date-Time Package

New package: java.time

Can finally forget about java.util.Date and java.util.Calendar classes

Rich and fluent set of classesConsistent design

Unsigned Integer Arithmetics

Java doesn't support unsigned integers (uint)

The java.lang.Integer and java.lang.Long class extended to support unsigned integers operations

• To/Parse operations

• Arithmetic

Under the Hood

Removal of PermGen Space

AES hardware support

Static-link JNI

Client-side TLS 1.2 enabled by default

Additional Improvements

New Nashorn scripting engine

Performance improvements

New/updated tools

Details:http://www.oracle.com/technetwork/java/javase/8-whats-new-2157071.html

Java 8 New Features

Thank you!

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