Lecture 8 abstract class and interfacemanish kumar
Abstract class and Interface both are used to achieve the concept of abstraction and using the interface we can implement the concept of multiple inheritance in java.
Lecture 8 abstract class and interfacemanish kumar
Abstract class and Interface both are used to achieve the concept of abstraction and using the interface we can implement the concept of multiple inheritance in java.
Are you Looking for the Best Institute for Java Online or Offline Training Course? PSK Technologies PVT.LTD. Nagpur offers Java training classes with live projects by expert trainers. Our Java training program is specially designed for Under-Graduates (UG), Graduates, working professionals, and also for Freelancers. We provide end to end learning on Java Domain with deeper dives for creating a winning career for every profile.
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/
PYTHON-Chapter 3-Classes and Object-oriented Programming: MAULIK BORSANIYAMaulik Borsaniya
Classes and Object-oriented Programming:
Classes: Creating a Class, The Self Variable, Constructor, Types of Variables, Namespaces, Types of Methods (Instance Methods, Class Methods, Static Methods), Passing Members of One Class to Another Class, Inner Classes
Inheritance and Polymorphism: Constructors in Inheritance, Overriding Super Class Constructors and Methods, The super() Method, Types of Inheritance, Single Inheritance, Multiple Inheritance, Method Resolution Order (MRO), Polymorphism, Duck Typing Philosophy of Python, Operator Overloading, Method Overloading, Method Overriding
Abstract Classes and Interfaces: Abstract Method and Abstract Class, Interfaces in Python, Abstract Classes vs. Interfaces,
Object oriented programming with pythonArslan Arshad
A short intro to how Object Oriented Paradigm work in Python Programming language. This presentation created for beginner like bachelor student of Computer Science.
Introduction of Object Oriented Programming Language using Java. .pptxPoonam60376
The slide contains the Introduction of Object Oriented Programming Language using Java. It covers basics of OOP, Inheritance,Polymorphism, Exception etc.
Are you Looking for the Best Institute for Java Online or Offline Training Course? PSK Technologies PVT.LTD. Nagpur offers Java training classes with live projects by expert trainers. Our Java training program is specially designed for Under-Graduates (UG), Graduates, working professionals, and also for Freelancers. We provide end to end learning on Java Domain with deeper dives for creating a winning career for every profile.
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/
PYTHON-Chapter 3-Classes and Object-oriented Programming: MAULIK BORSANIYAMaulik Borsaniya
Classes and Object-oriented Programming:
Classes: Creating a Class, The Self Variable, Constructor, Types of Variables, Namespaces, Types of Methods (Instance Methods, Class Methods, Static Methods), Passing Members of One Class to Another Class, Inner Classes
Inheritance and Polymorphism: Constructors in Inheritance, Overriding Super Class Constructors and Methods, The super() Method, Types of Inheritance, Single Inheritance, Multiple Inheritance, Method Resolution Order (MRO), Polymorphism, Duck Typing Philosophy of Python, Operator Overloading, Method Overloading, Method Overriding
Abstract Classes and Interfaces: Abstract Method and Abstract Class, Interfaces in Python, Abstract Classes vs. Interfaces,
Object oriented programming with pythonArslan Arshad
A short intro to how Object Oriented Paradigm work in Python Programming language. This presentation created for beginner like bachelor student of Computer Science.
Introduction of Object Oriented Programming Language using Java. .pptxPoonam60376
The slide contains the Introduction of Object Oriented Programming Language using Java. It covers basics of OOP, Inheritance,Polymorphism, Exception etc.
This presentation is ideal for a beginner of Java or someone who wants to brush up their Java Knowledge. It's simple to understand and well organized in a way most of the area in core Java has been covered.
Object- objects have states and behaviors. Example: A dog has states-color, name, breed , as well as behaviors – barking, eating. An object is an instance of a class.
Class- A class can be defined as a template/blue print that describe the behavior/states that object of its type support.
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Innovating Inference - Remote Triggering of Large Language Models on HPC Clus...Globus
Large Language Models (LLMs) are currently the center of attention in the tech world, particularly for their potential to advance research. In this presentation, we'll explore a straightforward and effective method for quickly initiating inference runs on supercomputers using the vLLM tool with Globus Compute, specifically on the Polaris system at ALCF. We'll begin by briefly discussing the popularity and applications of LLMs in various fields. Following this, we will introduce the vLLM tool, and explain how it integrates with Globus Compute to efficiently manage LLM operations on Polaris. Attendees will learn the practical aspects of setting up and remotely triggering LLMs from local machines, focusing on ease of use and efficiency. This talk is ideal for researchers and practitioners looking to leverage the power of LLMs in their work, offering a clear guide to harnessing supercomputing resources for quick and effective LLM inference.
AI Pilot Review: The World’s First Virtual Assistant Marketing SuiteGoogle
AI Pilot Review: The World’s First Virtual Assistant Marketing Suite
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AI Pilot Review: Key Features
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See My Other Reviews Article:
(1) TubeTrivia AI Review: https://sumonreview.com/tubetrivia-ai-review
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(3) AI Partner & Profit Review: https://sumonreview.com/ai-partner-profit-review
(4) AI Ebook Suite Review: https://sumonreview.com/ai-ebook-suite-review
Quarkus Hidden and Forbidden ExtensionsMax Andersen
Quarkus has a vast extension ecosystem and is known for its subsonic and subatomic feature set. Some of these features are not as well known, and some extensions are less talked about, but that does not make them less interesting - quite the opposite.
Come join this talk to see some tips and tricks for using Quarkus and some of the lesser known features, extensions and development techniques.
Software Engineering, Software Consulting, Tech Lead, Spring Boot, Spring Cloud, Spring Core, Spring JDBC, Spring Transaction, Spring MVC, OpenShift Cloud Platform, Kafka, REST, SOAP, LLD & HLD.
GraphSummit Paris - The art of the possible with Graph TechnologyNeo4j
Sudhir Hasbe, Chief Product Officer, Neo4j
Join us as we explore breakthrough innovations enabled by interconnected data and AI. Discover firsthand how organizations use relationships in data to uncover contextual insights and solve our most pressing challenges – from optimizing supply chains, detecting fraud, and improving customer experiences to accelerating drug discoveries.
Understanding Globus Data Transfers with NetSageGlobus
NetSage is an open privacy-aware network measurement, analysis, and visualization service designed to help end-users visualize and reason about large data transfers. NetSage traditionally has used a combination of passive measurements, including SNMP and flow data, as well as active measurements, mainly perfSONAR, to provide longitudinal network performance data visualization. It has been deployed by dozens of networks world wide, and is supported domestically by the Engagement and Performance Operations Center (EPOC), NSF #2328479. We have recently expanded the NetSage data sources to include logs for Globus data transfers, following the same privacy-preserving approach as for Flow data. Using the logs for the Texas Advanced Computing Center (TACC) as an example, this talk will walk through several different example use cases that NetSage can answer, including: Who is using Globus to share data with my institution, and what kind of performance are they able to achieve? How many transfers has Globus supported for us? Which sites are we sharing the most data with, and how is that changing over time? How is my site using Globus to move data internally, and what kind of performance do we see for those transfers? What percentage of data transfers at my institution used Globus, and how did the overall data transfer performance compare to the Globus users?
Essentials of Automations: The Art of Triggers and Actions in FMESafe Software
In this second installment of our Essentials of Automations webinar series, we’ll explore the landscape of triggers and actions, guiding you through the nuances of authoring and adapting workspaces for seamless automations. Gain an understanding of the full spectrum of triggers and actions available in FME, empowering you to enhance your workspaces for efficient automation.
We’ll kick things off by showcasing the most commonly used event-based triggers, introducing you to various automation workflows like manual triggers, schedules, directory watchers, and more. Plus, see how these elements play out in real scenarios.
Whether you’re tweaking your current setup or building from the ground up, this session will arm you with the tools and insights needed to transform your FME usage into a powerhouse of productivity. Join us to discover effective strategies that simplify complex processes, enhancing your productivity and transforming your data management practices with FME. Let’s turn complexity into clarity and make your workspaces work wonders!
How to Position Your Globus Data Portal for Success Ten Good PracticesGlobus
Science gateways allow science and engineering communities to access shared data, software, computing services, and instruments. Science gateways have gained a lot of traction in the last twenty years, as evidenced by projects such as the Science Gateways Community Institute (SGCI) and the Center of Excellence on Science Gateways (SGX3) in the US, The Australian Research Data Commons (ARDC) and its platforms in Australia, and the projects around Virtual Research Environments in Europe. A few mature frameworks have evolved with their different strengths and foci and have been taken up by a larger community such as the Globus Data Portal, Hubzero, Tapis, and Galaxy. However, even when gateways are built on successful frameworks, they continue to face the challenges of ongoing maintenance costs and how to meet the ever-expanding needs of the community they serve with enhanced features. It is not uncommon that gateways with compelling use cases are nonetheless unable to get past the prototype phase and become a full production service, or if they do, they don't survive more than a couple of years. While there is no guaranteed pathway to success, it seems likely that for any gateway there is a need for a strong community and/or solid funding streams to create and sustain its success. With over twenty years of examples to draw from, this presentation goes into detail for ten factors common to successful and enduring gateways that effectively serve as best practices for any new or developing gateway.
Providing Globus Services to Users of JASMIN for Environmental Data AnalysisGlobus
JASMIN is the UK’s high-performance data analysis platform for environmental science, operated by STFC on behalf of the UK Natural Environment Research Council (NERC). In addition to its role in hosting the CEDA Archive (NERC’s long-term repository for climate, atmospheric science & Earth observation data in the UK), JASMIN provides a collaborative platform to a community of around 2,000 scientists in the UK and beyond, providing nearly 400 environmental science projects with working space, compute resources and tools to facilitate their work. High-performance data transfer into and out of JASMIN has always been a key feature, with many scientists bringing model outputs from supercomputers elsewhere in the UK, to analyse against observational or other model data in the CEDA Archive. A growing number of JASMIN users are now realising the benefits of using the Globus service to provide reliable and efficient data movement and other tasks in this and other contexts. Further use cases involve long-distance (intercontinental) transfers to and from JASMIN, and collecting results from a mobile atmospheric radar system, pushing data to JASMIN via a lightweight Globus deployment. We provide details of how Globus fits into our current infrastructure, our experience of the recent migration to GCSv5.4, and of our interest in developing use of the wider ecosystem of Globus services for the benefit of our user community.
Listen to the keynote address and hear about the latest developments from Rachana Ananthakrishnan and Ian Foster who review the updates to the Globus Platform and Service, and the relevance of Globus to the scientific community as an automation platform to accelerate scientific discovery.
Launch Your Streaming Platforms in MinutesRoshan Dwivedi
The claim of launching a streaming platform in minutes might be a bit of an exaggeration, but there are services that can significantly streamline the process. Here's a breakdown:
Pros of Speedy Streaming Platform Launch Services:
No coding required: These services often use drag-and-drop interfaces or pre-built templates, eliminating the need for programming knowledge.
Faster setup: Compared to building from scratch, these platforms can get you up and running much quicker.
All-in-one solutions: Many services offer features like content management systems (CMS), video players, and monetization tools, reducing the need for multiple integrations.
Things to Consider:
Limited customization: These platforms may offer less flexibility in design and functionality compared to custom-built solutions.
Scalability: As your audience grows, you might need to upgrade to a more robust platform or encounter limitations with the "quick launch" option.
Features: Carefully evaluate which features are included and if they meet your specific needs (e.g., live streaming, subscription options).
Examples of Services for Launching Streaming Platforms:
Muvi [muvi com]
Uscreen [usencreen tv]
Alternatives to Consider:
Existing Streaming platforms: Platforms like YouTube or Twitch might be suitable for basic streaming needs, though monetization options might be limited.
Custom Development: While more time-consuming, custom development offers the most control and flexibility for your platform.
Overall, launching a streaming platform in minutes might not be entirely realistic, but these services can significantly speed up the process compared to building from scratch. Carefully consider your needs and budget when choosing the best option for you.
May Marketo Masterclass, London MUG May 22 2024.pdfAdele Miller
Can't make Adobe Summit in Vegas? No sweat because the EMEA Marketo Engage Champions are coming to London to share their Summit sessions, insights and more!
This is a MUG with a twist you don't want to miss.
OpenFOAM solver for Helmholtz equation, helmholtzFoam / helmholtzBubbleFoamtakuyayamamoto1800
In this slide, we show the simulation example and the way to compile this solver.
In this solver, the Helmholtz equation can be solved by helmholtzFoam. Also, the Helmholtz equation with uniformly dispersed bubbles can be simulated by helmholtzBubbleFoam.
First Steps with Globus Compute Multi-User EndpointsGlobus
In this presentation we will share our experiences around getting started with the Globus Compute multi-user endpoint. Working with the Pharmacology group at the University of Auckland, we have previously written an application using Globus Compute that can offload computationally expensive steps in the researcher's workflows, which they wish to manage from their familiar Windows environments, onto the NeSI (New Zealand eScience Infrastructure) cluster. Some of the challenges we have encountered were that each researcher had to set up and manage their own single-user globus compute endpoint and that the workloads had varying resource requirements (CPUs, memory and wall time) between different runs. We hope that the multi-user endpoint will help to address these challenges and share an update on our progress here.
2. Basic Concepts in Java
----------------------------------------------------------------------
3. What is a Class?
Class is a defined blue print (sketch) of how an object should be. From a
class several identical objects (real world things) can be created
(instantiated)
Person.class
public class Person {
String name;
int age;
public Sam(String mName, int mAge){
name = mName;
age = mAge
}
public void eat(){
System.out.println(“I eat”);
}
}
Creating an Object from Person.class
Person Sam = new Person(“Sam”, 42);
Sam.eat(); //prints I eat
4. What is a Class?
Declaring a class – Creating a “Person.class” file
Instantiating a class – Creating “Sam” object from “Person.class”
When declaring a class, following components should be added to the class :
Access Modifier – Granting an access level to the class. Eg: public/protected/default
Class name
Super class (if any) – Will be discussed later
Interfaces (if any) – Will be discussed later
Body - Body also have following controls
Variables : describing the properties of the object (Eg : name, age)
Methods : describing behavior of the object (Eg : eat(), sleep())
An object instantiated from a class will have the attributes and behavior available for the class along with a
unique object name (Eg: Sam)
5. What is a class?
Person.class
Characteristics
Name
Age
Behaviors
Eat()
Sleep()
Sam
Amal
John
6. What is a class?
Access modifiers
The access modifiers in Java specifies the accessibility or scope of a field,
method, constructor, or class
Note : Package is a collection of classes.
Access Modifiers Public Protected Private Default
Accessible inside class Yes Yes Yes Yes
Accessible within subclass inside
same package
Yes Yes No Yes
Accessible outside the package Yes No No No
Accessible within subclass outside
package
Yes Yes No No
7. What is a class?
Datatypes
Data Types
Primitive : Most basic
Int : Integer
Float : large decimal numbers
Boolean : True(1)/False(0)
Double : decimal values
Char : single character
Non Primitive
String : characters
Array : collection of values of a data type
8. Variables in a class
This represents the properties of a class and has following components:
<access modifier> <datatype> <variable_name> = <value>
Declaring the variable Initializing the variable
E.g.: public String name = “Sam”
9. Variables in a class
Variables can be placed in 3 locations in a class
Local variable
Declared and can be accessed within a method only
Access modifiers cannot be used for this variable
Instance variable
Declared outside the method and within the class
For each new object of the class, new instance(duplicate) of the variable is created
If the object is destroyed, the instance is also destroyed
Class / Static variable
Declared with keyword static, outside the method and within the class
There would only be one copy of each class variable per class, regardless of how many
objects are created from it.
10. Variables in a class
Static keyword
There would only be one copy of each variable/method, regardless of how many objects are
created from it
Final keyword
When a variable is given the keyword final, the value of the variable cannot be changed and
can only be used as a constant
Public class CalculateArea {
final double pi = 3.14;
public void changePi(){
pi = 3.15 //This is not allowed. Will generate a compile error
}
}
12. Methods in Java
These describe the behavior of the object
A method has following components:
<access modifier> <return type> <method name> ( <parameter list>){
<method body> //known as implementation
}
Return type : The datatype of the value returned from the method.
If there is a value returning from the method, “return <value>” SHOULD BE
PLACEED IN THE BOTTOM OF THE METHOD BODY.
If there is no data returned from the method the return type should be
VOID.
Declaring a method
Implementing
a method
13. Methods in Java
Public int sumValue(int a, int b){
return a+b;
}
Public void sumValue(int a, int b){
int sum = a+b;//There is nothing returned from the method
}
• Main Method :
• This is the method that is the entry point to the Java class/application.
• The signature of the main method is always:
public static void main(String[] args){
//method implementation
}
14. What are constructors then?
Constructors are the first method executed when an Object is created from
a class.
Person Sam = new Person()
This has the same name as the class and has no return type (so void)
We use the constructors to initialize the instance variables in the class
Whether you define or not every class has a constructor.
This is the first method
executed for the Sam
object
15. Loops in Java
There are various types of loops in Java
For loop
While loop
Do..while loop
Break keyword allows to break from the complete loop
Continue keyword allows to move to the next loop iteration skipping the
rest of the code
18. Why do you need OOP Concepts?
Ensuring security and access levels of classes
Easy to understand and implement the code
Ensure redundancy and increased code re-use
Maintenance of the code is easy
19. What are the OOP Concepts?
Inheritance
Encapsulation
Abstraction
Polymorphism
20. Inheritance
The concept allows us to place the general characteristics of several classes
in one class – super class.
From this class, the sub classes can inherit the general characteristics and
behaviors of the super class using the keyword - extend
The attributes and methods in the super class can be accessed using the
keyword super
22. Inheritance
Public class Employee{
String name;
int age;
String address;
getAttendance(){
System.out.println(“Attendance”);
}
}
Public class FullTime extends Employee{
double basicSalary;
getBasicSalary(){
System.out.println(“Name is” + super.name);
System.out.println(“Salary is” + basicSalary);
}
}
Public class PartTime extends Employee{
double allowance;
getBasicSalary(){
System.out.println(“Name is” + super.name);
System.out.println(“Allowance is” + allowance);
}
}
Super keyword allows to access variables or methods
from the parent class
24. Polymorphism
The ability of an object to have many forms.
Public class Animal{}
Public class Herbivores extends Animal{}
Public class Cow extends Herbivores{}
So we know that
Cow is a herbivore
Cow is an animal
Cow is a cow
Cow is an object
So a cow displays many such forms
displaying Polymorphism
25. Polymorphism
Methods can also implement polymorphism
Method overloading
Allowing a class to have method with same name but different parameters
This can be a constructor or any other method inside a class
The method can be overloaded by following ways
Public class Calculator{
Public void add(int num1, float num2){}//Original method
public void add(int num1, float num2, float num3){}//overloaded by no. of parameters
public void add(int num1,int num2){}//overloaded by data type
public void add(float num1,int num2){}//overloaded by data type order
}
26. Polymorphism
Method Overriding
Sub class having the same method as the parent class.
This occurs when the child class has different implementation(method body) for a method in parent class
Public class Employee{
public void getAttendance(){
System.out.println(“Employee Attendance”);
}
}
Public class PartTime extends Employee{
public void getAttendance(){
System.out.println(“Part Time Employee Attendance”);//Employee class method is override
}
}
27. Polymorphism
Method Overriding
When calling the getAttendance method for the PartTimeClass, the method
implementation in the PartTimeClass is executed.
Public class Test{
public static void main(String[] args){
Employee e = new Employee();
e.getAttendance(); // Employee Attendance – printed
PartTime p = new PartTime();
p.getAttendance();// Part Time Employee Attendance – printed
}
}
28. Encapsulation
Also known as data hiding.
Textbook definition : Wrapping variables and the methods acting on the variable as
single unit
Basically, we hide the data(variables) and allow the data to be accessed using methods.
We do not allow the variables/data to be accessed directly.
To achieve encapsulation in Java −
Declare the variables of a class as private.
Provide public setter and getter methods to modify and view the variables values.
29. Encapsulation
Public class Employee{
private string employeeName;
public string getName(){
return employeeName;
}
protected void setName(string eName){
employeeName = eName;
}
}
The employee name can be accessed by any
classes within / outside the package(of the
original class).
But the name can be updated only by the
classes within the package and the sub classes
outside the package
30. Abstraction
Abstraction hides how something is done. It gives the details of the method
name, output (returned) and input(parameter) details but not the method
body.
Abstraction is achieved using abstract classes, methods and interfaces
If a method is abstract the class must be abstract.
public abstract class Employee{
private string employeeName;
public abstract string setName(String name); //abstract method without body
}
31. Abstraction
Public abstract class Employee{
private string employeeName;
public string getName(){
return employeeName;
}
protected void setName(string eName){
employeeName = eName;
}
}
An abstract class is NOT allowed to create
objects(so that implementation is not visible to
another class).
But an abstract class can be inherited.
Why can’t we instantiate(create an object from) an abstract class?
An abstract class is an incomplete class and can have abstract methods. These
abstract methods do not have implementation(method body), so the will not be
allowed to execute. Hence, we cannot create objects from abstract class
32. Abstraction
Abstract methods
• Abstract methods are methods without method body.
• They have the method signature ( or what the method is about), not the implementation
(how the method is carried out)
Public abstract class Employee{
private string employeeName;
public string getName(){
return employeeName;
}
public abstract string setName();
}
33. Abstraction
Public class PartTime extends Employee{
public void setName(string eName){
employeeName = eName;//The abstract method must be implemented
}
}
When inheriting an abstract class, the abstract method must be implemented(method body should be written).
The sub class is now a complete class.
So this class can be used to create objects.
34. Interfaces
Java does not support multiple inheritance via classes.
But Java allows multiple inheritance via interfaces
Parent Class :
CalculateArea
Parent Class :
RegularShape
X
Child Class : Circle
Child Class :
Square
Interface:
CalculateArea
Parent Class :
RegularShape
Child Class : Circle
Child Class :
Square
X
35. Interfaces
Interfaces are implemented as follows:
<access_modifier> interface <interface_name>{
final <data type> <variable_name> = <value>
abstract <return type> <method_name> (parameter_list);
}
All the variables in an interface is final and the methods are abstract compared to a class
which doesn’t have such restrictions
All the variables and methods are public
A class can implement multiple interfaces
36. When to create an interface?
Consider the below scenario
A regular shape can be a circle or square.
The common characteristics of a regular shape is
Color
No. of edges
Most of the shapes(regular or irregular) have an area. In such case you can
have:
A parent class called shape (inherited by regular and with method CalculateArea
But the area calculation changes from shape to shape
An abstract class with method CalculateArea
Multiple inheritance is not allowed in Java
Interface with abstract method CalculateArea
This can be implemented
37. Abstract Classes and Interfaces
Interface Abstract Class
Support Multiple Inheritance Do not support multiple inheritance
Doesn’t have constructors Have constructors
Only has abstract method Has abstract and complete classes
Everything is public Can have other access modifiers
Cannot be static Can be static