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This presentation was used during CTE Solutions' Smarter Everyday event by JF Bilodeau
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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)
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
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