Java 8 is coming soon. In this presentation I have outlined the major Java 8 features. You get information about interface improvements, functional interfaces, method references, lambdas, java.util.function, java.util.stream
Java is Object Oriented Programming. Java 8 is the latest version of the Java which is used by many companies for the development in many areas. Mobile, Web, Standalone applications.
Presentation provides introduction and detailed explanation of the Java 8 Lambda and Streams. Lambda covers with Method references, default methods and Streams covers with stream operations,types of streams, collectors. Also streams are elaborated with parallel streams and benchmarking comparison of sequential and parallel streams.
Additional slides are covered with Optional, Splitators, certain projects based on lambda and streams
Java is Object Oriented Programming. Java 8 is the latest version of the Java which is used by many companies for the development in many areas. Mobile, Web, Standalone applications.
Presentation provides introduction and detailed explanation of the Java 8 Lambda and Streams. Lambda covers with Method references, default methods and Streams covers with stream operations,types of streams, collectors. Also streams are elaborated with parallel streams and benchmarking comparison of sequential and parallel streams.
Additional slides are covered with Optional, Splitators, certain projects based on lambda and streams
This is a beginner's guide to Java 8 Lambdas, accompnied with executable code examples which you can find at https://github.com/manvendrasinghkadam/java8streams. Java 8 Streams are based on Lambdas, so this presentation assumes you know Lambdas quite well. If don't then please let me know I'll create another presentation regarding it with code examples. Lambdas are relatively easy to use and with the power of stream api you can do functional programming in Java right from start. This is very cool to be a Java programmer now.
Start programming in a more functional style in Java. This is the second in a two part series on lambdas and streams in Java 8 presented at the JoziJug.
This presentation introduces some concepts about the Java Collection framework. These slides introduce the following concepts:
- Collections and iterators
- Linked list and array list
- Hash set and tree set
- Maps
- The collection framework
The presentation is took from the Java course I run in the bachelor-level informatics curriculum at the University of Padova.
Java Collections | Collections Framework in Java | Java Tutorial For Beginner...Edureka!
**** Java Certification Training: https://www.edureka.co/java-j2ee-soa-training ****
This Edureka tutorial on “Java Collections” will talk about the complete hierarchy of Collections Frameworks in Java. It will walk you through the various fundamentals of collections like Lists, Queue, Sets, Interfaces etc. Through this tutorial you will learn the following topics:
Java Collection Framework
Collection Framework Hierarchy
Interfaces
List
Queue
Set
Check out our Java Tutorial blog series: https://goo.gl/osrGrS
Check out our complete Youtube playlist here: https://goo.gl/gMFLx3
In Java 8, the java.util.function has numerous built-in interfaces. Other packages in the Java library (notably java.util.stream package) make use of the interfaces defined in this package. Java 8 developers should be familiar with using key interfaces provided in this package. This presentation provides an overview of four key functional interfaces (Consumer, Supplier, Function, and Predicate) provided in this package.
In this Meetup Victor Perepelitsky - R&D Technical Leader at LivePerson leading the 'Real Time Event Processing Platform' team , will talk about Java 8', 'Stream API', 'Lambda', and 'Method reference'.
Victor will clarify what functional programming is and how can you use java 8 in order to create better software.
Victor will also cover some pain points that Java 8 did not solve regarding functionality and see how you can work around it.
Java 8 Stream API. A different way to process collections.David Gómez García
A look on one of the features of Java 8 hidden behind the lambdas. A different way to iterate Collections. You'll never see the Collecions the same way.
These are the slides I used on my talk at the "Tech Thursday" by Oracle in June in Madrid.
My presentation slides in KMS TechCon 2014, an internal technology event at KMS Technology Vietnam company.
"Java 8 is one of the most highly anticipated programming language updates in many years. Let me give you an introduction about its new features: Lambda expressions, Method references, Default Methods, Stream API, new JS Engine, new Date/Time API and more..."
This is a beginner's guide to Java 8 Lambdas, accompnied with executable code examples which you can find at https://github.com/manvendrasinghkadam/java8streams. Java 8 Streams are based on Lambdas, so this presentation assumes you know Lambdas quite well. If don't then please let me know I'll create another presentation regarding it with code examples. Lambdas are relatively easy to use and with the power of stream api you can do functional programming in Java right from start. This is very cool to be a Java programmer now.
Start programming in a more functional style in Java. This is the second in a two part series on lambdas and streams in Java 8 presented at the JoziJug.
This presentation introduces some concepts about the Java Collection framework. These slides introduce the following concepts:
- Collections and iterators
- Linked list and array list
- Hash set and tree set
- Maps
- The collection framework
The presentation is took from the Java course I run in the bachelor-level informatics curriculum at the University of Padova.
Java Collections | Collections Framework in Java | Java Tutorial For Beginner...Edureka!
**** Java Certification Training: https://www.edureka.co/java-j2ee-soa-training ****
This Edureka tutorial on “Java Collections” will talk about the complete hierarchy of Collections Frameworks in Java. It will walk you through the various fundamentals of collections like Lists, Queue, Sets, Interfaces etc. Through this tutorial you will learn the following topics:
Java Collection Framework
Collection Framework Hierarchy
Interfaces
List
Queue
Set
Check out our Java Tutorial blog series: https://goo.gl/osrGrS
Check out our complete Youtube playlist here: https://goo.gl/gMFLx3
In Java 8, the java.util.function has numerous built-in interfaces. Other packages in the Java library (notably java.util.stream package) make use of the interfaces defined in this package. Java 8 developers should be familiar with using key interfaces provided in this package. This presentation provides an overview of four key functional interfaces (Consumer, Supplier, Function, and Predicate) provided in this package.
In this Meetup Victor Perepelitsky - R&D Technical Leader at LivePerson leading the 'Real Time Event Processing Platform' team , will talk about Java 8', 'Stream API', 'Lambda', and 'Method reference'.
Victor will clarify what functional programming is and how can you use java 8 in order to create better software.
Victor will also cover some pain points that Java 8 did not solve regarding functionality and see how you can work around it.
Java 8 Stream API. A different way to process collections.David Gómez García
A look on one of the features of Java 8 hidden behind the lambdas. A different way to iterate Collections. You'll never see the Collecions the same way.
These are the slides I used on my talk at the "Tech Thursday" by Oracle in June in Madrid.
My presentation slides in KMS TechCon 2014, an internal technology event at KMS Technology Vietnam company.
"Java 8 is one of the most highly anticipated programming language updates in many years. Let me give you an introduction about its new features: Lambda expressions, Method references, Default Methods, Stream API, new JS Engine, new Date/Time API and more..."
This presentation provides an overview of using the Java SE 8 Date & Time API. It covers how to:
1. Create and manage date-based and time-based events including a combination of date and time into a single object using LocalDate, LocalTime, LocalDateTime, Instant, Period, and Duration
2. Work with dates and times across timezones and manage changes resulting from daylight savings including format date and times values
3. Define and create and manage date-based and time-based events using Instant, Period, Duration, and TemporalUnit
Java Persistence API (JPA) - A Brief OverviewCraig Dickson
This is a lightning presentation given by Scott Rabon, a member of my development team. He presents a high level overview of the JPA based on his first exposure to it.
JUnit: A unit testing framework that is extensively used to test the code written in Java.
Unit testing is a type of software testing.
Software testing: The process of examining whether the software and its components meet the specified requirements
Other types of software testing are as shown.
JavaOne 2016 - Learn Lambda and functional programmingHenri Tremblay
This tutorial walks through tons of examples. You will learn everything you need to know about lambdas and functional programming in Java 8. I'm the supplier. You’re the consumer (and you will get the joke after the session).
SoCal Code Camp 2015: An introduction to Java 8Chaitanya Ganoo
Java 8 introduced cool new features such as Lambdas and Streams. We'll take a look at what they are how to use them effectively. We'll also walkthrough an example of a lightweight Java 8 service running in AWS cloud, which can read and index tweets into an ElasticSearch cluster
Presentation on the new features introduced in JDK 8, presented on the 26.02.2013 in Sofia University in front of students and members of the Bulgarian java user group.
Here we are going to learn why is a good practice to use interfaces and how they are different from abstraction classes. Further more we are going to see how which one of them to use.
When embracing Java 8 we walk down the yellow brick road to the wizard of lambdas. That road usually starts from the fear and terror of learning their syntax until finally getting to understand them and opening our minds to the fruitful fields of functional programming. But this road eventually reaches a final stage: the lambda abuse.
To master the lambdas art means to know when to use them and when not to not damage your brain and, most importantly, other Java developers’. Keep your code readable and maintainable, avoid becoming a lambda addict!
This presentaion provides and overview of the new features of Java 8, namely default methods, functional interfaces, lambdas, method references, streams and Optional vs NullPointerException.
This presentation by Arkadii Tetelman (Lead Software Engineer, GlobalLogic) was delivered at Java.io 3.0 conference in Kharkiv on March 22, 2016.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
"Impact of front-end architecture on development cost", Viktor TurskyiFwdays
I have heard many times that architecture is not important for the front-end. Also, many times I have seen how developers implement features on the front-end just following the standard rules for a framework and think that this is enough to successfully launch the project, and then the project fails. How to prevent this and what approach to choose? I have launched dozens of complex projects and during the talk we will analyze which approaches have worked for me and which have not.
6. Interface Improvements
(cont.)
public interface A {
default void foo(){
System.out.println("Calling A.foo()");
}
}
CODE
FAILS
public interface B {
default void foo(){
System.out.println("Calling A.foo()");
}
}
public class MyClass implements A, B { }
6
7. Interface Improvements
(cont.)
This can be fixed :
Overriding in
implementation
class
public class MyClass implements A, B {
default void foo(){
System.out.println("Calling from my class.");
}
}
OR
public class MyClass implements A, B {
default void foo(){
A.super.foo();
Calling the default
implementation of method
}
foo() from interface A
}
7
9. Interface Improvements
(cont.)
Why do we need default methods in
Interface?
List<Person> persons = asList(
new Person("Joe"),
new Person("Jim"),
new Person("John"));
persons.forEach(p -> p.setLastName("Doe"))
9
11. Functional Interface
An interface is a functional interface
if it defines exactly one abstract
method.
For Example: java.lang.Runnable is a functional interface.
Because it has only one abstract method.
@FunctionalInterface
public interface Runnable {
public abstract void run();
}
11
12. Functional Interface
(cont.)
Functional interfaces are also called Single
Abstract Method (SAM) interfaces. Anonymous
Inner Classes can be created using these
interfaces.
public class MyAnonymousInnerClass {
public static void main(String[] args) {
new Thread(new Runnable() {
@Override
public void run() {
System.out.println(“Hello!");
}}).start();
}
}
12
13. Functional Interface
(cont.)
public class MyAnonymousInnerClass {
public static void main(String[] args) {
new Thread(new Runnable() {
@Override
public void run() {
System.out.println(“Hello!");
}}).start();
Unclear
}
Bit excessive
}
Cumbersome
Lambda Expressions can help us
13
14. How can lambda expression
help us?
But before that we need to
see:
Why are lambda
expressions being added
to Java?
14
15. Most pressing reason is:
Lambda expressions make
the distribute
processing of
collections over
multiple threads easier.
15
16. How do we process lists and
sets today ?
Collection
Iterator
What is the
issue?
16
Client
Code
Parallel
Processing
17. In Java 8 -
Client
Code
CODE AS A
DATA
f
Collection
f
17
f
f
f
18. Benefits of doing this:
Collections can now organise
their iteration internally.
Responsibility for
parallelisation is transferred
from client code to library
code.
18
19. But client code needs a simple way of
providing a function to the collection
methods.
Currently the standard way of doing
this is by means of an anonymous class
implementation of the appropriate
interface.
Using a lambda, however, the same
effect can be achieved much more
concisely.
19
20. public class MyAnonymousInnerClass {
public static void main(String[] args) {
new Thread(new Runnable() {
@Override
public void run() {
System.out.println(“Hello!");
}}).start();
}
}
public class MyAnonymousInnerClass {
public static void main(String[] args) {
new Thread(() -> System.out.println(“Hello!")
).start();
}
}
20
21. Lambda Expression
Lambda Expression (Project Lambda) is
one of the most exciting feature of
Java 8.
Remember
SAM type?
In Java lambda expression is SAM type.
Lambda expressions let us express
instances of single-method classes
more compactly.
21
22. So what is lambda
expression?
In mathematics and computing generally,
a lambda expression is a function.
For some
or
all
combinations
of input
values
22
It specifies
An output
value
23. Lambda Syntax
The basic syntax of lambda is either
(parameters) -> expression
or
(parameters) -> { statements; }
23
24. Some examples
(int x, int y) -> x + y
// takes two integers and returns
their sum
(x, y) -> x – y
// takes two numbers and returns their
difference
() -> 42
// takes no values and returns 42
(String s) -> System.out.println(s)
// takes a string, prints its value to the console, and returns
nothing
x -> 2 * x
// takes a number and returns the result of
doubling it
c -> { int s = c.size(); c.clear(); return s; }
// takes a collection, clears it, and returns its previous size
24
25. public class Main {
@FunctionalInterface
interface Action {
void run(String s);
}
public void action(Action action){
action.run("Hello");
}
public static void main(String[] args) {
new Main().action(
(String s) -> System.out.print("*" + s + "*")
);
}
}
25
OUTPUT: *Hello*
26. There is a generated method lambda$0 in the decompiled class
E:JAVA-8-EXAMPLESLAMBDA>javap -p Main
Compiled from "Main.java"
public class Main {
public Main();
public void action(Main$Action);
public static void main(java.lang.String[]);
private static void lambda$main$0(java.lang.String);
}
26
31. With Lambda Expression
public class WithLambdaExpressionTest {
public static void main(String[] args) {
List<Person> roster = Person.createRoster();
Person[] rosterAsArray = roster.toArray(new Person[roster.size()]);
// With lambda expression
Arrays.sort(rosterAsArray,
(Person a, Person b) -> {return a.getAge().compareTo(b.getAge());}
);
for(int i=0; i<rosterAsArray.length; ++i){
System.out.println("" + rosterAsArray[i]);
}
}
}
OUTPUT
Person{age=20}
Person{age=24}
Person{age=35}
31
32. However, this method to compare the ages of
two Person instances already exists as
Person.compareByAge
So we can invoke this method instead in the
body of the lambda expression:
Arrays.sort(rosterAsArray,
(a, b) -> Person.compareByAge(a, b) );
But we can do it more concisely using Method
Reference.
32
33. With Method Reference
public class MethodReferenceTest {
public static void main(String[] args) {
List<Person> roster = Person.createRoster();
Person[] rosterAsArray = roster.toArray(new Person[roster.size()]);
// With method reference
Arrays.sort(rosterAsArray,
Person::compareByAge
);
for(int i=0; i<rosterAsArray.length; ++i){
System.out.println("" + rosterAsArray[i]);
}
}
}
OUTPUT
Person{age=20}
Person{age=24}
Person{age=35}
33
34. There are four kinds of Method
Reference
Reference to a static method
ContainingClass::staticMethodName
Reference to an instance method of a particular object
ContainingObject::instanceMethodName
Reference to an instance method of an arbitrary object
of a particular type
ContainingType::methodName
Reference to a constructor
ClassName::new
34
36. Examples (cont.)
Reference to an instance method of a particular
object
class ComparisonProvider {
public int compareByName(Person a, Person b) {
return a.getName().compareTo(b.getName());
}
public int compareByAge(Person a, Person b) {
return a.getBirthday().compareTo(b.getBirthday());
}
}
ComparisonProvider myCompProvider = new ComparisonProvider();
Arrays.sort(rosterAsArray, myCompProvider::compareByName);
36
37. Examples (cont.)
Reference to an instance method of an
arbitrary object of a particular type
String[] stringArray = { "Barbara", "James", "Mary",
"John", "Patricia", "Robert", "Michael", "Linda" };
Arrays.sort(stringArray, String::compareToIgnoreCase );
37
39. java.util.function
Function<T, R>
R as output
Takes a T as input, returns an
Predicate<T> Takes a T as input, returns a
boolean as output
Consumer<T> Takes a T as input, performs some
action and doesn't return anything
Supplier<T> Does not take anything as input,
return a T
And many more --39
40. java.util.stream
Allows us to perform filter/map/reduce
-like operations with the collections
in Java 8.
List<Book> books = …
//sequential version
Stream<Book> bookStream = books.stream();
//parallel version
Stream<Book> parallelBookStream =
books.parallelStream();
40