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Java thread and interview questions

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(Update 09-01-2020) Java 8

(baeldung) Introduction to Java 8 Streams

Lambda Expressions and Functional Interfaces: Tips and Best Practices

New Features in Java 8

GitHub (eugenp) :

Core Java 8

Core Java 8 (part 2)

Also:

Java 8 Features with Examples

Prominent Java 8 Features With Code Examples

(Update 05-19-2020) There are a lot of online code playground or white boarding tools for code testing on the spot.

(Original ) Hibernate map one to many (Vlad Mihalcea)

A collection of the posts I saw recently.

Java World
Introduction to Java threads

Java 101: Understanding Java threads, Part 1: Introducing threads and runnables

Others
Java Callable Future Example

Java – Multithreading

Java Thread Tutorial: Creating Threads and Multithreading in Java

Vaadin chat example
It needs multi session (thread) support when we need to use tabs to chat back and forth. The app description is here.

The annotation to support this: @VaadinSessionScope

Java interview questions
Placeholder: I still need to clean up the list below (to incorporate my recent interview experience).

aop
dependency injection
refactor
agile
test driven
code review (what to look)
static vs. final
interface
spring
hibernate

java generics

tree set vs hash set

tree map vs linked hash map
https://dzone.com/articles/hashmap-vs-treemap-vs

.equals() vs ==

Java String equals()

Elasticsearch 

Digitalocean installation

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