This document provides an overview of core Java concepts including primitive types, wrappers, static methods and blocks, strings, abstract classes and interfaces, collections, equals and hashcode methods, and threads. It defines each concept, provides examples of usage, and notes key behaviors and properties. The document serves as a reference for fundamental Java programming concepts.
ppt of class and methods in java,recursion in java,nested class,java,command line argument,method overloading,call by value,call by reference,constructor overloading core java ppt
In this session you will learn:
background and goals of generic programming
basics of generic classes = parameterized types
generic methods for general algorithms
inheritance rules for generic types
bounded type parameters
generic code and the Java Virtual Machine
restrictions and limitations
wildcard types and wildcard type capture
For more information, visit this link: https://www.mindsmapped.com/courses/software-development/online-java-training-for-beginners/
To learn about the basic concepts of Object Oriented Programming and Inheritance plus different Inheritance Models and interview questions will be covered.
Learn about how to define and invoke methods in Java, how to use parameters and return results. Watch the video lesson here:
https://softuni.org/code-lessons/java-foundations-certification-methods
Ahora que conocemos lo que es una clase y un objeto, crearemos archivos especiales que contienen una clase completa, y veremos cómo usarlos para crear objetos en otros archivos, dentro de un proyecto C#
ppt of class and methods in java,recursion in java,nested class,java,command line argument,method overloading,call by value,call by reference,constructor overloading core java ppt
In this session you will learn:
background and goals of generic programming
basics of generic classes = parameterized types
generic methods for general algorithms
inheritance rules for generic types
bounded type parameters
generic code and the Java Virtual Machine
restrictions and limitations
wildcard types and wildcard type capture
For more information, visit this link: https://www.mindsmapped.com/courses/software-development/online-java-training-for-beginners/
To learn about the basic concepts of Object Oriented Programming and Inheritance plus different Inheritance Models and interview questions will be covered.
Learn about how to define and invoke methods in Java, how to use parameters and return results. Watch the video lesson here:
https://softuni.org/code-lessons/java-foundations-certification-methods
Ahora que conocemos lo que es una clase y un objeto, crearemos archivos especiales que contienen una clase completa, y veremos cómo usarlos para crear objetos en otros archivos, dentro de un proyecto C#
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Synapse India Reviews About:
Functional/procedural programming:
program is a list of instructions to the computer
Object-oriented programming
program is composed of a collection objects that communicate with each other
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
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
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.
Let's dive deeper into the world of ODC! Ricardo Alves (OutSystems) will join us to tell all about the new Data Fabric. After that, Sezen de Bruijn (OutSystems) will get into the details on how to best design a sturdy architecture within ODC.
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.
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
"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.
3. Primitive types
• int 4 bytes
• short 2 bytes
• long 8 bytes
• byte 1 byte
• float 4 bytes
• double 8 bytes
• char Unicode encoding (2 bytes)
• boolean {true,false}
Behaviors is
exactly as in
C++
Note:
Primitive type
always begin
with lower-case
4. Wrappers
Java provides Objects which
wrap primitive types and supply
methods.
Example:
Integer n = new Integer(“4”);
int m = n.intValue();
Read more about Integer in JDK Documentation
5. Static
Member data - Same data is used for all the
instances (objects) of some Class.
Class A {
public int y = 0;
public static int x_ = 1;
};
A a = new A();
A b = new A();
System.out.println(b.x_);
a.x_ = 5;
System.out.println(b.x_);
A.x_ = 10;
System.out.println(b.x_);
Assignment performed
on the first access to the
Class.
Only one instance of ‘x’
exists in memory
Output:
1
5
10
a b
y y
A.x_
0 0
1
6. Static
Member function
− Static member function can access only static
members
− Static member function can be called without an
instance.
Class TeaPot {
private static int numOfTP = 0;
private Color myColor_;
public TeaPot(Color c) {
myColor_ = c;
numOfTP++;
}
public static int howManyTeaPots()
{ return numOfTP; }
// error :
public static Color getColor()
{ return myColor_; }
}
7. Static
Usage:
TeaPot tp1 = new TeaPot(Color.RED);
TeaPot tp2 = new TeaPot(Color.GREEN);
System.out.println(“We have “ +
TeaPot.howManyTeaPots()+ “Tea Pots”);
8. Static
Block
− Code that is executed in the first reference to the
class.
− Several static blocks can exist in the same class
( Execution order is by the appearance order in
the class definition ).
− Only static members can be accessed.
class RandomGenerator {
private static int seed_;
static {
int t = System.getTime() % 100;
seed_ = System.getTime();
while(t-- > 0)
seed_ = getNextNumber(seed_);
}
}
}
9. String is an Object
• Constant strings as in C, does not exist
• The function call foo(“Hello”) creates a String
object, containing “Hello”, and passes reference to it
to foo.
• There is no point in writing :
• The String object is a constant. It can’t be changed
using a reference to it.
String s = new String(“Hello”);
10. Abstract
abstract member function, means that the function
does not have an implementation.
abstract class, is class that can not be
instantiated.
AbstractTest.java:6: class AbstractTest is an abstract class.
It can't be instantiated.
new AbstractTest();
^
1 error
NOTE:
An abstract class is not required to have an abstract method in
it.
But any class that has an abstract method in it or that does
not provide an implementation for any abstract methods
declared
in its superclasses must be declared as an abstract class.
11. Abstract - Example
package java.lang;
public abstract class Shape {
public abstract void draw();
public void move(int x, int y) {
setColor(BackGroundColor);
draw();
setCenter(x,y);
setColor(ForeGroundColor);
draw();
}
}
package java.lang;
public class Circle extends Shape {
public void draw() {
// draw the circle ...
}
}
12. Interface
Interfaces are useful for the following:
• Capturing similarities among unrelated classes
without artificially forcing a class relationship.
• Declaring methods that one or more classes are
expected to implement.
• Revealing an object's programming interface
without revealing its class.
13. Interface
abstract “class”
Helps defining a “usage contract” between
classes
All methods are public
Java’s compensation for removing the
multiple inheritance. You can “inherit” as
many interfaces as you want.
*
- The correct term is “to implement”an interface
14. Interface
interface SouthParkCharacter {
void curse();
}
interface IChef {
void cook(Food food);
}
interface BabyKicker {
void kickTheBaby(Baby);
}
class Chef implements IChef, SouthParkCharacter {
// overridden methods MUST be public
// can you tell why ?
public void curse() { … }
public void cook(Food f) { … }
}
* access rights (Java forbids reducing of access rights)
15. When to use an interface ?
Perfect tool for encapsulating the
classes inner structure. Only the
interface will be exposed
16. Collections
Collection/container
− object that groups multiple elements
− used to store, retrieve, manipulate, communicate
aggregate data
Iterator - object used for traversing a collection and
selectively remove elements
Generics – implementation is parametric in the type of
elements
17. Java Collection Framework
Goal: Implement reusable data-structures and
functionality
Collection interfaces - manipulate collections
independently of representation details
Collection implementations - reusable data
structures
List<String> list = new ArrayList<String>(c);
Algorithms - reusable functionality
− computations on objects that implement collection
interfaces
− e.g., searching, sorting
− polymorphic: the same method can be used on many
different implementations of the appropriate collection
interface
20. General Purpose Implementations
Collection
Set List Queue
SortedSet
Map
Sorted Map
HashSet HashMap
List<String> list1 = new ArrayList<String>(c);
ArrayListTreeSet TreeMapLinkedList
List<String> list2 = new LinkedList<String>(c);
21. final
final member data
Constant member
final member
function
The method can’t be
overridden.
final class
‘Base’ is final, thus it
can’t be extended
final class Base {
final int i=5;
final void foo() {
i=10;
//what will the compiler say
about this?
}
}
class Derived extends Base {
// Error
// another foo ...
void foo() {
}
}(String class is final)
22. final
final class Base {
final int i=5;
final void foo() {
i=10;
}
}
class Derived extends Base {
// Error
// another foo ...
void foo() {
}
}
Derived.java:6: Can't subclass final classes: class Base
class class Derived extends Base {
^
1 error
23. Exception - What is it and why do I care?
Definition: An exception is an event that occurs
during the execution of a program that disrupts
the normal flow of instructions.
• Exception is an Object
• Exception class must be descendent of
Throwable.
24. Exception - What is it and why do I care?
By using exceptions to manage errors, Java
programs have the following advantages over
traditional error management techniques:
1: Separating Error Handling Code from "Regular"
Code
2: Propagating Errors Up the Call Stack
3: Grouping Error Types and Error Differentiation
26. Why Override The Defaults
• For equals consider the default:
NaturalNumber n1 = new NaturalNumber2();
NaturalNumber n2 = new NaturalNumber2();
boolean b = n1.equals(n2);
• What is the value of b with the default implementation
of equals ?
27. Why Override The Defaults
For hashCode consider the default:
NaturalNumber n1 = new NaturalNumber2();
NaturalNumber n2 = new NaturalNumber2();
Set s = new Set4<>(); s.add(n1);
boolean b = s.contains(n2);
• What is the value of b with the default implementation of
hashCode ?
28. Threads Overview
– Threads allow the program to run tasks in parallel
– In many cases threads need to be synchronized,
that is, be kept not to handle the same data in memory
concurrently
– There are cases in which a thread needs to wait for
another thread before proceeding
29. Threads in Java
public class Thread1 extends Thread {
@Override
public void run() {
System.out.println("Thread1 ThreadId: " +
Thread.currentThread().getId());
// do our thing
PrintNumbers.printNumbers();
// the super doesn't anything,
// but just for the courtesy and good
practice
super.run();
}
}
30. Threads in Java
static public void main(String[] args) {
System.out.println("Main ThreadId: " +
Thread.currentThread().getId());
for(int i=0; i<3; i++) {
new Thread1().start(); // don't call run!
// (if you want a separate thread)
}
printNumbers();
}
31. Threads in Java
public class Thread2 implements Runnable {
@Override
public void run() {
System.out.println("Thread2 ThreadId: " +
Thread.currentThread().getId());
// do our thing
PrintNumbers.printNumbers();
}
}
32. Threads in Java
static public void main(String[] args) {
System.out.println("Main ThreadId: " +
Thread.currentThread().getId());
for(int i=0; i<3; i++) {
new Thread(new Thread2()).start();
// again, don't call run!
// (if you want a separate thread)
}
printNumbers();
}