[Early Release 01] • Java 11 Quick Start · Learn About the Developments in the Latest Long Term Java Release [Early Release] by Gupta, Mala -- Read -- Imperial Library of Trantor

Index

Preface Type inference

What is type inference? Type inference with var

Compulsory non-null initialization Local variables Code check – part 1 Using var with primitive data types Type inference with derived classes Type inference – with interfaces Using var with arrays Type inference with generics Code check – part 2 Passing inferred variables to a method Reassigning value to inferred variables Explicit casting with inferred variables Assigning null with explicit casting

Type inference in previous versions of Java

Type inference in Java 5 Type inference in Java 7 Type inference in Java 8

Challenges

Limiting the scope of failed assumptions Breaking existing code Non-denotable types Meaningful variable names Code refactoring

Type inference versus dynamic binding Summary

Application class data sharing Garbage Collector optimizations API Improvements and other changes Local variable syntax for Lambda parameters Epsilon and its design considerations HTTP Client and other changes Enhanced Enums in Project Amber

Introduction to enums in Java 5

Decompiled enum – behind the scenes

Adding state and behavior to enum constants

Adding generics to Enums

Sharper typing of enum constants

Summary

Data classes and their usage

Introduction to the data classes

What is a data class Need of adding data classes to the language

Deep dive into data classes

An example Aggregate and exploded form of a data class The limitations Examples from the past – changes to define enums Pattern matching with the data classes Encapsulating state Data classes and inheritance Extending an abstract data class Implementing interfaces Additional variables Overriding implicit behaviour Additional methods and constructors Mutability Thread safety

Summary

Raw String literals Lambda Leftovers Pattern matching and switch expressions Value based optimizations Generics improvements Filters and Continuations JVM and native code