Java abstract class & abstract methods,Abstract class in java
Abstract classes are classes that contain one or more abstract methods. An abstract method is a method that is declared, but contains no implementation. Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods.
Chapter 02: Classes Objects and Methods Java by Tushar B KuteTushar B Kute
The lecture was condcuted by Tushar B Kute at YCMOU, Nashik through VLC orgnanized by MSBTE. The contents can be found in book "Core Java Programming - A Practical Approach' by Laxmi Publications.
Java abstract class & abstract methods,Abstract class in java
Abstract classes are classes that contain one or more abstract methods. An abstract method is a method that is declared, but contains no implementation. Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods.
Chapter 02: Classes Objects and Methods Java by Tushar B KuteTushar B Kute
The lecture was condcuted by Tushar B Kute at YCMOU, Nashik through VLC orgnanized by MSBTE. The contents can be found in book "Core Java Programming - A Practical Approach' by Laxmi Publications.
In the Java programming language, the final keyword is used in several different contexts to define an entity that can only be assigned once. Once a final variable has been assigned, it always contains the same value.
Interface in java ,multiple inheritance in java, interface implementationHoneyChintal
multiple inheritance in java, interface implementation, abstraction,
multiple inheritance in java using interface, how to use interface,
how to use java, how to execute a java code
Inheritance in java is a mechanism in which one object acquires all the properties and behaviors of parent object. The idea behind inheritance in java is that you can create new classes that are built upon existing classes.
In the Java programming language, the final keyword is used in several different contexts to define an entity that can only be assigned once. Once a final variable has been assigned, it always contains the same value.
Interface in java ,multiple inheritance in java, interface implementationHoneyChintal
multiple inheritance in java, interface implementation, abstraction,
multiple inheritance in java using interface, how to use interface,
how to use java, how to execute a java code
Inheritance in java is a mechanism in which one object acquires all the properties and behaviors of parent object. The idea behind inheritance in java is that you can create new classes that are built upon existing classes.
To learn about the basic concepts of Object Oriented Programming and Inheritance plus different Inheritance Models and interview questions will be covered.
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
Classes, Objects and Method - Object Oriented Programming with JavaRadhika Talaviya
Class is template for an object and object is instance of a class.
When we create a class, we are creating a new data type. we can use this type to declare objects of that type.
The topics covers in this presentation is overloading methods,Construcotr
1 Objects as parameter to methods
2 objects as parameter to construcotr
3 Returning objects
4 String Class
5 String Buffer Class
6 Command line arguments
7 Access Controle
8 Static keyword usage
9 Final keyword usage
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
2. Class
• Java class is nothing but a template for object you are going to create or it’s a blue
print by using this we create an object.
Class (name of the class)
{
(Here define member of class)
}
• A class is a user defined datatype with a template that serves to define its properties
• Members of a Class
• Field: instance variables are called fields
• Method: method is nothing but the operation that an object can
perform
Class Stock
{
/*fields */
Public commodity;
Public price;
/*method /
ublic void buy (int no_of_commodity) {}
ublic boolean sale () {}
}
3. Variables and method declaration
• Data is encapsulated in class by placing variables inside the body of the
class
class Demo{
int int_variable,a;
}
• A method is a set of code which is referred to by name and can be called
(invoked) at any point in a program
• Method declaration has four basic parts
• Method name,Return type,Argument list,Method body
class Demo
{
type method-name(parameter list)
{
method body;
}
}
5. Object
• "object" refers to a particular instance of a class where the object can be
a combination of variables, functions, and data structures and block of
Memory to store all variables,fuctions,data structure.
• Creating an Object :Objects in java are created using the new operator.
The new operator creates the objects of the specified class and return the
referenc to that object
class_name <object_name>=new class_name();
class Demo_class
{
int int_variable;
public void demo()
{
System.out.println("hello");
}
public static void main(String[] y)
{
/*
*creating and object
*/
Demo_class a=new Demo_class();
System.out.println("what contains in a object "+a);
}
}
6. Accessing instance variables and
methods
class Demo_class
{
int int_variable=10;
public void demo()
{
System.out.println("hello");
}
public static void main(String[] y)
{
/*
*creating and object
*/
Demo_class a=new Demo_class();
a.demo();
System.out.println("the value of int_variable is"+a.int_variable);
System.out.println("what contains in a object "+a);
}
}
7. Assigning Object reference variables
• Object reference is the variable that holds the memory location of the real
object. Object Reference variable is just like pointer in c but not exactly
class_name <object_name>=new class_name();
class_name <refference_name>=object_name;
class Demo_class
{
int int_variable=10;
public void demo()
{
System.out.println("hello");
}
public static void main(String[] y)
{
/*
*creating and object
*/
Demo_class a=new Demo_class();
Demo_class b=a;
b.int_variable=20;
System.out.println("the value of int_variable is"+a.int_variable);
}
}
8. Methods
• A method is a group of Java statements that perform some operation on
some data, and may or may not return a result.
class Demo_class
{ public void demo()
{System.out.println("hello");}
/* method with return type */
public int demo_1()
{return (2);}
/*method with arguments*/
public void demo_2(int a)
{ System.out.println("the parameter a value is::"+a);}
public static void main(String[] y)
{/* *creating and object */
Demo_class a=new Demo_class();
/*method calling */
a.demo();
System.out.println("the return type value is "+a.demo_1());
a.demo_2(10);
}
}
9. Constructor
• When ever we are creating an object some piece of code will execute
internally to perform initialization, that piece of code is nothing but
“constructor“.
Rules for writing constructors
• The name of the class and name of the constructor must be same
• A constructor may have or may not have parameters
• If a constructor doesn’t have any parameters, it is called ‘default‘ constructor.
• If a constructor has 1 or more parameters, It is called “Parameterized constructor.
• Return type is not allowed for the constructors even void also
• the only applicable modifiers for the constructors are private, protected, default, public. If we
are using any other modifiers we will get compile time error.
• A constructor is automatically called and executed at the time of creating an object.
• If nothing is passed to the object,then default constructor is called and executed.if some
values are passed to the object ,then the parameterized constructor is called
• A constructor is called and executed only once per object
•
11. This Keyword
• Which can be used inside method or constructor of class
• It(this) works as a reference to current object whose method
or constructor is being invoked
• this keyword can be used to refer any member of current object from
within an instance method or a constructor.
Usage of java this keyword
• this keyword can be used to refer current class instance variable.
• this() can be used to invoke current class constructor.
• this keyword can be used to invoke current class method (implicitly)
• this can be passed as an argument in the method call.
• this can be passed as argument in the constructor call.
• this keyword can also be used to return the current class instance.
12. Instance variable hiding with this key
word
class Demo_class
{
int i,j=20;
public void demo(int i)
{
this.i=i;
System.out.println("the value i in method"+i);
}
public static void main(String[] y)
{
Demo_class d=new Demo_class();
d.demo(30);
System.out.println("the class variable i::"+d.i);
}
}
13. Garbage Collection
• Java destruction of object from memory is done automatically by the JVM.
When there is no reference to an object, then that object is assumed to be
no longer needed and the memory occupied by the object are released.
This technique is called Garbage Collection. This is accomplished by the
JVM.
Advantage of Garbage Collection
• It makes java memory efficient because garbage collector removes the
unreferenced objects from heap memory.
• It is automatically done by the garbage collector(a part of JVM) so we
don't need to make extra efforts.
14. • Correct the error in the following code
Class Variable_Name
{
Public static void main(string[] y)
{
Sytem.out.println(“hello world”);
}
};
Correct the Error in the Following Code
Class Return_value
{
public string name=“team”;
public string getName()
{
System.out.println(“hello world”);
return(“hello”);
}
public static void main(String[] y)
{
Return_value rv=new Return_Value();
String y;
y=rv.getName();
System.out.println(“”+y);
}
}