Java	oop	simple	example
  Java	oops	concepts	examples.	Java	oops	tutorial	with	example.	Java	simple	object	example.	
  OOP	stands	for	Object	Oriented	Programming.	Procedural	programming	is	about	writing	procedures	or	methods	that	perform	operations	on	data,	while	object-oriented	programming	is	about	creating	objects	that	contain	both	data	and	methods.	Object-oriented	programming	has	several	advantages	over	procedural	programming:	OOP	is	faster	and
  easier	to	implement	OOP	offers	a	clear	structure	for	programs	OOP	helps	keep	Java	code	dry	"Don't	repeat	yourself"	and	makes	waiting	code	easier	.	Editing	and	debugging	OOP	allows	you	to	create	fully	reusable	applications	with	less	code	and	shorter	development	time.	Tip:	The	"DOST	Repeat	Enough"	principle	(dry)	about	reducing	code	repetition.
  You	should	extract	and	reuse	codes	that	are	common	to	the	application	and	put	them	in	one	place	instead	of	repeating	them.	Java	-	What	are	classes	and	objects?	Classes	and	objects	are	the	two	main	aspects	of	object-oriented	programming.	Look	at	the	following	image	to	see	the	difference	between	classes	and	objects:	Another	example:	A	class	is	a
  template	for	objects	and	an	object	is	an	instance	of	a	class.	When	individual	objects	are	created,	they	inherit	all	variables	and	methods	from	the	class.	You	will	learn	much	more	about	classes	and	objects	in	the	next	chapter.	On	this	page	we	will	learn	the	basics	of	oops.	Object-oriented	programming	is	a	paradigm	that	provides	many	concepts	such	as
  inheritance,	databases,	polymorphism,	etc.	Simula	is	considered	to	be	the	first	object-oriented	programming	language.	A	programming	paradigm	in	which	everything	is	represented	as	an	object	is	known	as	a	truly	object-oriented	programming	language.	SmallTalk	is	considered	the	first	object-oriented	programming	language.	Common	object-oriented
  languages	​​are	Java,	C#,	PHP,	Python,	C++,	etc.	The	main	goal	of	object-oriented	programming	is	to	implement	real	entities,	e.g.	B.	Objects,	classes,	abstractions,	inheritance,	polymorphism,	etc.	Oops	(object-oriented	programming	system)	An	object	means	an	actual	unit	such	as	a	pen,	chair,	desk,	computer,	clock,	etc.	Object-oriented	programming	is
  an	object.	a	methodology	or	paradigm	for	designing	a	program	using	classes	and	objects.	It	simplifies	software	development	and	maintenance	by	providing	some	concepts:	Polymorphism	Class	Abstraction	Capsule	Polymorphism	Polymorphism.	In	addition	to	these	concepts,	other	terms	are	used	in	object-oriented	design:	coupling	cohesionThe
  Aggregation	Composition	Object	Any	entity	that	has	a	state	and	behavior	is	called	an	object.	For	example,	a	chair,	pen,	table,	keyboard,	bicycle,	etc.	can	be	physical	or	logical.	The	facility	can	be	defined	as	a	class	instance.	The	facility	contains	an	address	and	occupies	a	location	in	memory.	Objects	can	communicate	without	knowing	the	details	of	their
  data	or	code.	Only	the	type	of	message	accepted	and	the	type	of	response	returned	by	objects	are	required.	Example:	A	dog	is	an	object	because	it	has	states	like	color,	name,	breed,	etc.,	as	well	as	behaviors	like	wagging	a	tail,	barking,	eating,	etc.	The	collection	of	classes	is	called	a	class.	It's	a	logical	unit.	The	class	can	also	be	defined	as	a	schema
  from	which	a	single	object	can	be	created.	The	class	does	not	take	up	space.	Inheritance	When	an	object	inherits	all	of	the	properties	and	behavior	of	its	parent,	it's	called	inheritance.	Provides	the	ability	to	reuse	the	code.	It	is	used	to	achieve	polymorphism	during	performance.	Polymorphism	When	a	task	is	performed	in	different	ways,	it	is	called
  polymorphism.	For	example:	convince	the	customer	differently,	draw	something,	e.g.	B.	shape,	triangle,	rectangle,	etc.	In	Java,	we	use	overload	methods	and	override	methods	to	get	polymorphism.	Another	example	would	say	something;	For	example,	a	cat	meow,	a	dog	bark,	etc.	abstraction	that	hides	internal	details	and	shows	the	functionality	is
  called	an	abstraction.	For	example,	a	phone	call,	we	don't	know	the	internal	processing.	In	Java,	we	use	an	abstract	class	and	interface	to	achieve	abstraction.	The	code	and	data	of	the	encapsulation	binding	(or	a	wrapper)	and	data	together	into	a	single	entity	is	referred	to	as	an	encapsulation.	For	example,	the	capsule	is	wrapped	in	various
  medicines.	The	Java	class	is	an	example	of	encapsulation.	Java	Grain	is	a	fully	hermetic	class	since	all	data	members	are	private	here.	Coupling	coupling	refers	to	knowledge,	information,	or	dependency	of	another	class.	It	arises	when	the	classes	are	aware	of	each	other.	When	the	class	has	detailed	information	about	another	class,	there	is	strong
  coupling.	In	Java,	we	use	private,	protected,	and	public	modifiers	to	indicate	the	class's	level	of	visibility,	methods,	and	fields.	You	can	use	interfaces	for	weaker	coupling	as	there	is	no	specific	implementation.	Cohesion	consistency	refers	to	the	level	of	the	component	performing	a	well-defined	task.	A	single,	well-defined	task	is	performed	by
  Highmethod.	A	somewhat	consistent	method	will	break	the	task	into	separate	parts.	Java.io	is	a	very	cohesive	package	because	it	has	classes	and	an	interface	tied	to	input	and	output.	However,	the	java.util	package	is	a	bit	of	a	connected	package	because	it	has	unrelated	classes	and	interfaces.	An	associate	association	shows	the	relationships	between
  objects.	Here,	one	object	can	be	associated	with	one	object	or	many	objects.	There	can	be	four	types	of	communication	between	objects:	one-to-one,	one-to-many,	many-to-one,	and	many-to-many.	Let's	get	into	real-time	relationships.	For	example,	one	country	may	have	one	prime	minister	(one-to-one)	and	a	prime	minister	may	have	many	ministers
  (one-to-many).	Also,	multiple	deputies	can	have	one	prime	minister	(many-to-one)	and	many	ministers	can	have	multiple	departments	(many-to-many).	The	association	can	be	indefinite	or	two-dimensional.	Aggregation	aggregation	is	a	way	to	achieve	a	relationship.	Aggregation	is	the	attitude	in	which	one	object	contains	other	objects	as	part	of	its
  state.	This	is	a	poor	connection	between	objects.	This	is	also	called	the	HAS-A	ratio	in	Java.	For	example,	heritage	is	an	"Eat"	attitude.	This	is	another	way	to	reuse	objects.	Composition	is	also	a	way	to	achieve	a	relationship.	Composition	is	the	attitude	in	which	one	object	contains	other	objects	as	part	of	its	state.	There	is	a	strong	relationship	between
  the	containing	object	and	the	dependent	object.	This	is	a	condition	where	the	containing	objects	do	not	have	independent	existence.	If	you	delete	the	parent	object,	all	subsidiaries	will	be	deleted	automatically.	The	advantage	of	OOP	over	a	procedure-oriented	programming	language	1)	OOP	simplifies	development	and	support	while	it	is	not
  manageable	in	a	procedure-oriented	programming	language	if	the	code	grows	as	the	size	of	the	project	increases.	2)	OOP	provides	data	hiding	whereas	in	procedure	oriented	programming	language	global	data	can	be	accessed	from	anywhere.	Figure:	Data	presentation	in	procedure-oriented	programming	drawing:	Data	presentation	in	object-
  oriented	programming	3)	OOP	provides	the	ability	to	model	real-world	events	more	efficiently.	We	can	present	a	solution	to	the	real	word	problem	if	we	use	an	object-oriented	programming	language.	What	is	the	difference	between	an	object-oriented	programming	language	and	an	object-oriented	programming	language?	The	following	is	an	object-
  oriented	programming	language.OPS	functions	except	in	inheritance.	JavaScript	and	VBScript	are	examples	of	object-oriented	programming	languages.	You	know?	Can	we	overload	the	main	method?	The	java	designer	returns	the	value,	but	what?	Can	we	create	a	program	without	the	main	method?	What	are	six	ways	to	use	this	keyword?	Why	is
  multiple	inheritance	not	supported	in	Java?	Why	use	aggregation?	Can	we	reduce	the	static	method?	What	is	the	returned	type	of	covariates?	What	are	the	three	options	for	using	the	Java	Super	keyword?	Why	use	an	instance	initialization	unit?	What	is	the	benefit	of	an	empty	final	variable?	What	is	a	label	or	a	marked	interface?	What	is	polymorphism
  of	execution	time	or	dynamic	method?	What	is	the	difference	between	static	and	dynamic	binding?	How	is	a	decrease	in	Java?	What	is	a	private	developer	for?	What	is	object	cloning?	What	do	we	learn	from	the	concepts	of	OOP?	The	advantage	of	OOPS	is	the	name	of	the	congress	object	and	class	methods	constructor	static	keyword	is	a	keyword	with
  six	aggregation	method	for	aggregation	aggregation	Aggregation	Revaluation	of	the	covariant	type	of	returned	meaning	Super	keyword	block	final	keyword	abstract	interface	class	Polymorphism	Statical	and	Dynamic	Bindings	Reducing	Reducing	Contracies	with	access	to	the	village.	Cloning	is	another	agreement	for	the	topic	in	the	system	of	object-
  oriented	programming	Java	(OOPS).	This	is	the	concept	of	programming,	which	works	on	the	principles	of	abstraction,	encapsulation,	inheritance	and	polymorphism.	This	allows	users	to	create	objects	that	they	want,	and	create	methods	for	processing	these	objects.	The	main	OOPS	concept	is	to	create	objects,	re	-use	them	in	the	program	and
  manipulate	these	objects	to	obtain	results.	The	value	of	the	OOP	is	object-oriented	programming-a	well-known	and	widely	used	concept	in	modern	programming	languages,	such	as	Java.	Below	are	the	general	concepts	of	OOP	in	Java:	1)	class	is	one	of	the	basic	concepts	of	OOP,	which	is	a	group	of	similar	entities.	This	is	only	a	logical	component,	not
  a	physical	object.	Let's	analyze	this	one	of	the	OOPS	concepts	on	an	example,	if	you	had	a	class	called	“expensive	cars”,	it	could	have	objects	such	as	Mercedes,	BMW,	Toyota,	etc.	Its	properties	(data)	may	be	the	price	or	there	may	be	a	price	The	speed	of	these	cars.	.	While	the	methods	can	be	performed	with	these	cars,	moving,	reverse,	inhibition,
  etc.	2)	the	object	can	be	defined	as	an	instance	of	the	class,	and	the	program	can	have	several	copies	of	the	class.	The	object	is	one	of	the	OOPS	concepts	in	Java,	whichBoth	the	data	and	the	function	that	works	with	the	data.	For	example,	"Chair,	bicycle,	marker,	pen,	table,	car,	etc.	3)	Inheritance	-	Inheritance	is	one	of	the	main	concepts	of	UPR,
  where	one	object	acquires	the	properties	and	behavior	of	a	parent	object.	Creates	a	parent-child	relationship	between	two	classes.	It	offers	a	reliable	and	natural	mechanism	for	organizing	and	structuring	any	software.	4)	Polymorphism	Polymorphism	refers	to	one	of	the	OOP	concepts	in	Java,	which	is	the	ability	of	a	variable,	object,	or	function	to
  take	on	multiple	forms.	For	example,	in	English,	the	verb	time	has	a	different	meaning	if	you	use	it	with	a	laptop,	running,	and	business.	Here	we	understand	the	meaning	of	running	based	on	other	words	used	along	with	it.	The	same	was	true	for	polymorphism.	5)	Abstraction	Abstraction	is	one	of	the	OOP	concepts	in	Java,	which	is	the	act	of
  presenting	essential	functions	without	minor	details.	It	is	a	method	of	creating	a	new	data	type	suitable	for	a	particular	application.	We	understand	that	with	one	of	the	OOPS	concepts	as	an	example,	you	do	not	need	to	worry	about	its	inner	workings	when	driving	a	car.	Here	you	just	have	to	worry	about	details	like	steering	wheel,	gears,	accelerator,
  etc.	6)	Encapsulation	Encapsulation	is	one	of	the	best	Java	OOPS	concepts	for	packaging	data	and	code.	In	this	OOP	concept,	class	variables	are	always	hidden	from	other	classes.	It	can	only	be	accessed	through	the	methods	of	their	current	class.	For	example,	in	a	school,	a	student	cannot	exist	without	a	class.	7)	Association	is	a	relationship	between
  two	objects.	This	is	one	of	the	OOP	concepts	in	Java	that	defines	the	variety	of	objects.	In	this	OOP	concept,	all	objects	have	their	own	separate	lifecycle	and	do	not	have	an	owner.	For	example,	several	students	can	work	with	one	teacher,	and	one	student	can	work	with	several	teachers.	8)	Aggregation.	In	this	technique,	all	objects	have	their	own	life
  cycle.	However,	there	is	a	property	that	a	child	object	cannot	be	owned	by	another	parent	object.	Take,	for	example,	the	classroom/subject	department	and	the	teacher.	Here,	one	teacher	cannot	belong	to	multiple	departments,	but	even	if	we	delete	the	department,	the	teacher	object	will	never	be	destroyed.	9)	Composite	composition	is	a	specialized
  form	of	aggregation.	This	is	also	called	the	relationship	of	death.	Child	objects	don't	have	a	life	cycle,	so	when	the	parent	deletes	all	childrenIt	will	also	be	automatically	deleted.	To	do	this,	let's	take	an	example	of	home	and	rooms.	Each	house	can	have	several	rooms.	One	room	cannot	become	part	of	two	different	houses.	So,	if	you	remove	the	room	in
  the	house,	it	will	also	be	removed.	Advantages	of	OOP	(object-oriented	programming	system):	OOPS	concepts	in	Java	offer	simple	to	understand	and	a	clear	structure	of	modular	programs.	Objects	created	for	programs	-oriented	objects	can	be	re	-used	in	other	programs.	This	saves	significant	development	costs.	Large	programs	are	difficult	to	write,
  but	if	the	development	and	development	team	is	regulated	by	OOPS	concepts,	then	they	can	be	better	developed	with	minimal	disadvantages.	Increases	the	modality	of	the	program,	because	each	object	exists	independently.	Comparing	the	UPS	with	other	programming	styles,	using	an	example,	let's	understand	how	Java	Oops	concepts	differ	from
  other	approaches	to	programming.	Programming	languages	can	be	divided	into	3	basic	types	of	un	-destroyed	programming	languages:	the	most	primitive	of	all	programming	languages	that	have	a	consistent	management	flow.	The	code	is	repeated	throughout	the	program	of	structured	programming	languages:	it	has	a	non	-chatted	control	stream.
  Using	functions	allows	you	to	re	-use	the	code.	Object	-oriented	programming	languages:	combines	data	and	actions	together.	Click	here	if	the	video	is	not	available.	Let's	understand	these	3	types	by	example.	Suppose	you	want	to	create	banking	software	with	functions	as	a	choice	of	deposit.	Show	the	balance	of	unstructured	programming
  languages,	the	first	in	programming	languages	were	unstructured	programming	languages.	A	very	elementary	code	of	the	bank	application	in	the	language	of	unstructured	programming	will	have	two	variables	of	one	account	number,	and	the	other	for	the	balance	of	the	account	int	number_utu	=	20;	Int	balance_pret	=	100;	Suppose	a	deposit	of	$
  100.	Account_Balance	=	Account_Balance+100	Next,	you	need	to	display	the	balance	of	your	account.	Printf	(account	number	=%D,	number_cush)	Printf	(âzhzka	account	=%D,	Balance_piece)	is	now	raised	$	50.	Account_Balance	=	Account_balace-50	must	again	display	the	balance	of	your	account.	Printf	(account	number	=%D,	number_piece)	Printf
  (âzdatek	Account	=%D,	Balance_piece)	for	any	further	deposit	or	choice.	You	will	repeat	the	code	again	and	again.	Structural	programming	with	the	appearance	of	structured	programming	was	inserted	into	such	structures	as	functions	or	methods.	WheneverA	simple	function	call	is	made.	Object	-oriented	programming	in	our	program	We	deal	with
  data	or	perform	specific	operations	with	data.	Actually,	having	data	and	performing	a	certain	operation	is	a	very	basic	function	of	each	program.	Software	programming	experts	were	thinking	about	a	combination	of	data	and	operations.	From	there,	object	-oriented	programming	was	born,	commonly	referred	to	as	oops.	The	same	code	in	object	-
  oriented	programming	languages	will	have	the	same	data	and	some	actions	carried	out	with	these	data.	Class	account	{int	number_pětu;	Int	balance_creen;	public	void	showdata	()	{System.out.println	(â#chocry	â+number_btu)	System.out.println	.	These	are	described	in	more	detail	in	later	tutorials.