Object Oriented Programming - Abstraction & Encapsulation

Object Oriented Programming - Abstraction & Encapsulation

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  2SC2 – OOPC# Dudy Fathan Ali S.Kom Abstraction dan Encapsulation 2SC2 Dudy Fathan Ali, S.Kom (DFA) 2015 CEP - CCIT Fakultas Teknik Universitas Indonesia
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  Abstraction 2SC2 – OOPC# Dudy Fathan Ali S.Kom You are the salesman, please help the customer.. Hey, I need a Car.
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  Abstraction 2SC2 – OOPC# Dudy Fathan Ali S.Kom Hey, I need a Car. You are the salesman, please help the customer..
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  Abstraction 2SC2 – OOPC# Dudy Fathan Ali S.Kom Abstraction involves extracting only the relevant information. Courseware NIIT – Object Oriented Programming Using C# - 1
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  Abstraction 2SC2 – OOPC# Dudy Fathan Ali S.Kom In a programmer’s perspective.. Display Car Insert Car Class Car I want to Display the Car Delete Car Just because the user want to display it, doesn’t mean insert and delete function is unavailable.
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  Encapsulation 2SC2 – OOPC# Dudy Fathan Ali S.Kom Encapsulation, in the context of C#, refers to an object's ability to hide data and behavior that are not necessary to its user. www.techopedia.com Private - Employee’s Salary I want to access ID Employee Yes, because it’s Public Public – Name, ID of Employee Cashier Human Resources Database
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  Human Resources Database Encapsulation 2SC2 –OOP C# Dudy Fathan Ali S.Kom Encapsulation, in the context of C#, refers to an object's ability to hide data and behavior that are not necessary to its user. www.techopedia.com Private - Employee’s Salary Public – Name, ID of Employee I want to access my friend’s salary No, because it’s private!! It doesn’t belongs to cashier. Cashier
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  Human Resources Database Encapsulation 2SC2 –OOP C# Dudy Fathan Ali S.Kom Encapsulation, in the context of C#, refers to an object's ability to hide data and behavior that are not necessary to its user. www.techopedia.com Private - Employee’s Salary Public – Name, ID of EmployeeHRD Manager I want to access my friend’s salary Yes, because this data is belongs to him Yes, because this data is belongs to him and also it’s public
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  Encapsulation 2SC2 – OOPC# Dudy Fathan Ali S.Kom In a programmer’s perspective.. Private – Employee’s Salary Public – Name, ID of Employee Access to all code in the program Class HR_Data Access to only members of the same class Yes, same class! method method
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  Private Encapsulation – AccessSpecifier 2SC2 – OOP C# Dudy Fathan Ali S.Kom Encapsulation, in the context of C#, refers to an object's ability to hide data and behavior that are not necessary to its user. www.techopedia.com Public Protected Internal Protected Internal Access Specifier
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  Encapsulation – AccessSpecifier 2SC2 – OOP C# Dudy Fathan Ali S.Kom Encapsulation, in the context of C#, refers to an object's ability to hide data and behavior that are not necessary to its user. www.techopedia.com
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  Encapsulation – AccessSpecifier 2SC2 – OOP C# Dudy Fathan Ali S.Kom Encapsulation, in the context of C#, refers to an object's ability to hide data and behavior that are not necessary to its user. www.techopedia.com Class DisplayData { public void Method1() { Console.WriteLine(“Public”); Method2(); } private void Method2() { Console.WriteLine(“Private”); } } Output : Class Program : DisplayData dd = new DisplayData(); dd.Method1(); Public Private Access Specifier
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  Encapsulation – AccessSpecifier 2SC2 – OOP C# Dudy Fathan Ali S.Kom Encapsulation, in the context of C#, refers to an object's ability to hide data and behavior that are not necessary to its user. www.techopedia.com Class DisplayData { public void Method1() { Console.WriteLine(“Public”); Method2(); } private void Method2() { Console.WriteLine(“Private”); } } Output : Error!! Because method2() has a private access. Class Program : DisplayData dd = new DisplayData(); dd.Method2(); Access Specifier
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  3SC4 PNJ –Q5 Dudy Fathan Ali S.Kom Terima Kasih Dudy Fathan Ali S.Kom dudy.fathan@eng.ui.ac.id