Difference Betwixt Abstraction As Well As Encapsulation Inwards Coffee - Oop
Sunday, October 28, 2018
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Both Abstraction in addition to Encapsulation are 2 of the 4 basic OOP concepts which allow yous to model real-world things into objects thus that yous tin implement them inwards your computer program in addition to code. Many beginners acquire confused betwixt Abstraction in addition to Encapsulation because they both await rattling similar. If yous inquire somebody what is Abstraction, he volition nation that it's an OOP concept which focuses on relevant information past times hiding unnecessary detail, in addition to when yous inquire nearly Encapsulation, many volition nation that it's about other OOP concept which hides information from exterior world. The definitions are non incorrect equally both Abstraction in addition to Encapsulation does cover something, but the key departure is on intent.
Abstraction hides complexity past times giving yous a to a greater extent than abstract picture, a kind of 10,000 feet view, spell Encapsulation hides internal working thus that yous tin modify it later. In other words, Abstraction hides details at the design level, spell Encapsulation hides details at the implementation level.
For example, when yous start pull an object, yous utter inwards to a greater extent than abstract term e.g. a Vehicle which tin move, yous don't nation how Vehicle volition move, whether it volition motion past times using tires or it volition wing or it volition sell. It simply moves. This is called Abstraction. We are talking nearly a most essential thing, which is moving, rather than focusing on details similar moving inwards plane, sky, or water.
There are likewise the unlike levels of Abstraction in addition to it's practiced exercise that classes should interact amongst other classes amongst the same aeroplane of abstraction or higher aeroplane of abstraction. As yous increase the aeroplane of Abstraction, things start getting simpler in addition to simpler because yous leave of absence out details.
On the other hand, Encapsulation is all nearly implementation. Its sole role is to cover internal working of objects from exterior basis thus that yous tin modify it after without impacting exterior clients.
For example, nosotros convey a HashMap which allows yous to shop the object using put() method in addition to retrieve the object using the get() method. How HashMap implements this method (see here) is an internal especial of HashMap, the customer alone cares that position stores the object in addition to acquire provide it back, they are non concerned whether HashMap is using an array, how it is resolving the collision, whether it is using linked list or binary tree to shop object landing on same bucket etc.
Because of Encapsulation, yous tin modify the internal implementation of HashMap amongst stay without impacting clients who are using HashMap. For example, inwards Java 8, the java.util.HashMap changes its implementation to utilisation a binary tree instead of LinkedList to shop objects inwards the same bucket after a for sure threshold (see here).
The customer doesn't postulate to brand whatever modify to create goodness from this code modify because those details are non exposed to them. Had customer knows nearly that i.e. somehow they tin acquire the reference of the internal array from HashMap, it would non convey been possible to modify the implementation without impacting clients.
There are many pattern principles which are based on Abstraction e.g. "coding for interfaces thus implementation" which helps yous to write flexible code inwards Java or C++. The thought is that a aeroplane depend upon on an interface, a higher aeroplane of abstraction than the class, a lower aeroplane of abstraction. This lawsuit inwards flexible code which tin run amongst whatever implementation of the interface.
For example, if yous postulate HashMap, your aeroplane should depend upon Map instead of HashMap. Similarly, if yous postulate ArrayList, brand for sure yous should utilisation the List. Thankfully, Uncle Bob has shared several such pattern principles on Clean Code, collectively known equally SOLID pattern principles, which is something every OOP programmer must acquire in addition to understand.
1) The most of import departure betwixt Abstraction in addition to Encapsulation is that Abstraction solves the occupation at pattern aeroplane spell Encapsulation solves it implementation level.
2) Abstraction is nearly hiding unwanted details spell giving out most essential details, spell Encapsulation way hiding the code in addition to information into a unmarried unit of measurement e.g. aeroplane or method to protect inner working of an object from exterior world. In other words, Abstraction way extracting mutual details or generalizing things.
3) Abstraction lets yous focus on what the object does instead of how it does, spell Encapsulation way hiding the internal details of how an object works. When yous continue internal working details private, yous tin modify it after amongst a amend method. The Head First Object Oriented Analysis in addition to Design has about fantabulous examples of these OOP concepts, I propose yous read that mass at to the lowest degree in ane lawsuit to revisit OOP fundamentals.
4) Abstraction focus on outer scout e.g. moving of vehicle spell Encapsulation focuses on internal working or inner scout e.g. how just the vehicle moves.
5) In Java, Abstraction is supported using interface in addition to abstract class spell Encapsulation is supported using access modifiers e.g. public, private in addition to protected.
Here is a prissy tabular array highlighting key differences betwixt Abstraction in addition to Encapsulation inwards Object Oriented Programming:
That's all nearly the difference betwixt Abstraction in addition to Encapsulation inwards Java in addition to OOP. I understand, they both seems rattling similar but equally I said they are a totally unlike concept. Just recollect that Abstraction solves the occupation at pattern aeroplane spell Encapsulation solves at the implementation level. Both are rattling of import for an OOP programmer but sometimes it tin endure hard to explain.
As I convey said before, the best way to acquire in addition to main Object-Oriented programming is past times writing code in addition to reading code of others. The to a greater extent than yous are exposed to code, the to a greater extent than yous realize how these concepts run inwards practice. There are several pattern principles which are based inwards damage of Abstraction e.g. coding for interface rather than implementation which allows yous to write flexible code.
Further Learning
answer)The departure betwixt Inheritance in addition to Polymorphism inwards Java? (answer) The departure betwixt Aggregation, Composition, in addition to Association inwards OOP? (answer) The departure betwixt State in addition to Strategy pattern patterns? (answer) What is Polymorphism inwards Java? Overloading or Overriding? (answer) What is the departure betwixt Overloading in addition to Overriding inwards OOP? (answer) The departure betwixt illustration in addition to object inwards Java? (answer) What is the departure betwixt static in addition to dynamic binding inwards Java? (answer) Thanks for reading this article, if yous actually similar this article thus delight part amongst your friends in addition to colleagues. If yous convey whatever enquiry or proposition thus delight drib a comment. If yous desire to read to a greater extent than nearly OOP concepts, SOLID pattern principles in addition to applying OOP concepts inwards existent life, simply read Clean Code.
Sumber https://javarevisited.blogspot.com/
Abstraction hides complexity past times giving yous a to a greater extent than abstract picture, a kind of 10,000 feet view, spell Encapsulation hides internal working thus that yous tin modify it later. In other words, Abstraction hides details at the design level, spell Encapsulation hides details at the implementation level.
For example, when yous start pull an object, yous utter inwards to a greater extent than abstract term e.g. a Vehicle which tin move, yous don't nation how Vehicle volition move, whether it volition motion past times using tires or it volition wing or it volition sell. It simply moves. This is called Abstraction. We are talking nearly a most essential thing, which is moving, rather than focusing on details similar moving inwards plane, sky, or water.
There are likewise the unlike levels of Abstraction in addition to it's practiced exercise that classes should interact amongst other classes amongst the same aeroplane of abstraction or higher aeroplane of abstraction. As yous increase the aeroplane of Abstraction, things start getting simpler in addition to simpler because yous leave of absence out details.
On the other hand, Encapsulation is all nearly implementation. Its sole role is to cover internal working of objects from exterior basis thus that yous tin modify it after without impacting exterior clients.
For example, nosotros convey a HashMap which allows yous to shop the object using put() method in addition to retrieve the object using the get() method. How HashMap implements this method (see here) is an internal especial of HashMap, the customer alone cares that position stores the object in addition to acquire provide it back, they are non concerned whether HashMap is using an array, how it is resolving the collision, whether it is using linked list or binary tree to shop object landing on same bucket etc.
Because of Encapsulation, yous tin modify the internal implementation of HashMap amongst stay without impacting clients who are using HashMap. For example, inwards Java 8, the java.util.HashMap changes its implementation to utilisation a binary tree instead of LinkedList to shop objects inwards the same bucket after a for sure threshold (see here).
The customer doesn't postulate to brand whatever modify to create goodness from this code modify because those details are non exposed to them. Had customer knows nearly that i.e. somehow they tin acquire the reference of the internal array from HashMap, it would non convey been possible to modify the implementation without impacting clients.
There are many pattern principles which are based on Abstraction e.g. "coding for interfaces thus implementation" which helps yous to write flexible code inwards Java or C++. The thought is that a aeroplane depend upon on an interface, a higher aeroplane of abstraction than the class, a lower aeroplane of abstraction. This lawsuit inwards flexible code which tin run amongst whatever implementation of the interface.
For example, if yous postulate HashMap, your aeroplane should depend upon Map instead of HashMap. Similarly, if yous postulate ArrayList, brand for sure yous should utilisation the List. Thankfully, Uncle Bob has shared several such pattern principles on Clean Code, collectively known equally SOLID pattern principles, which is something every OOP programmer must acquire in addition to understand.
Difference betwixt Abstraction vs Encapsulation
Here are about of the key departure betwixt Encapsulation in addition to Abstraction inwards yell for format for your quick revision:1) The most of import departure betwixt Abstraction in addition to Encapsulation is that Abstraction solves the occupation at pattern aeroplane spell Encapsulation solves it implementation level.
2) Abstraction is nearly hiding unwanted details spell giving out most essential details, spell Encapsulation way hiding the code in addition to information into a unmarried unit of measurement e.g. aeroplane or method to protect inner working of an object from exterior world. In other words, Abstraction way extracting mutual details or generalizing things.
3) Abstraction lets yous focus on what the object does instead of how it does, spell Encapsulation way hiding the internal details of how an object works. When yous continue internal working details private, yous tin modify it after amongst a amend method. The Head First Object Oriented Analysis in addition to Design has about fantabulous examples of these OOP concepts, I propose yous read that mass at to the lowest degree in ane lawsuit to revisit OOP fundamentals.
4) Abstraction focus on outer scout e.g. moving of vehicle spell Encapsulation focuses on internal working or inner scout e.g. how just the vehicle moves.
5) In Java, Abstraction is supported using interface in addition to abstract class spell Encapsulation is supported using access modifiers e.g. public, private in addition to protected.
Here is a prissy tabular array highlighting key differences betwixt Abstraction in addition to Encapsulation inwards Object Oriented Programming:
That's all nearly the difference betwixt Abstraction in addition to Encapsulation inwards Java in addition to OOP. I understand, they both seems rattling similar but equally I said they are a totally unlike concept. Just recollect that Abstraction solves the occupation at pattern aeroplane spell Encapsulation solves at the implementation level. Both are rattling of import for an OOP programmer but sometimes it tin endure hard to explain.
As I convey said before, the best way to acquire in addition to main Object-Oriented programming is past times writing code in addition to reading code of others. The to a greater extent than yous are exposed to code, the to a greater extent than yous realize how these concepts run inwards practice. There are several pattern principles which are based inwards damage of Abstraction e.g. coding for interface rather than implementation which allows yous to write flexible code.
Further Learning
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