11. abstraction and capsulation
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Data abstraction refers to providing only essential information to the outside world and hiding background details. It is a technique that separates an interface from its implementation, so that the interface remains intact even if the underlying implementation changes. For example, a program can call a sorting function without knowing the specific sorting algorithm, and the algorithm could change without affecting the program. Data abstraction also protects class internals from errors and allows the implementation to evolve over time without requiring changes to user-level code.
11. abstraction and capsulation
- 1. Data abstraction Lesson 11 MANOLO L. GIRON RMTU Structure of Programming Language
- 2. Data abstraction • refers to, providing only essential information to the outside world and hiding their background details, i.e., to represent the needed information in program without presenting the details. • is a programming (and design) technique that relies on the separation of interface and implementation. • Abstraction separates code into interface and implementation. So while designing your component, you must keep interface independent of the implementation so that if you change underlying implementation then interface would remain intact Structure of Programming Language
- 3. For example • your program can make a call to the sort() function without knowing what algorithm the function actually uses to sort the given values. In fact, the underlying implementation of the sorting functionality could change between releases of the library, and as long as the interface stays the same, your function call will still work. Structure of Programming Language
- 4. Benefits of Data Abstraction • Class internals are protected from inadvertent user-level errors, which might corrupt the state of the object. • The class implementation may evolve over time in response to changing requirements or bug reports without requiring change in user-level code. Structure of Programming Language
- 5. Encapsulation • is an Object Oriented Programming concept that binds together the data and functions that manipulate the data, and that keeps both safe from outside interference and misuse.. Structure of Programming Language
- 6. Exception Handlers • The On Error statement is used specifically for unstructured exception handling. Structure of Programming Language
- 7. Error Handler • The statement that can handle the error in a program. • MsgBox("Choose a button", vbCritical+vbYesNo) Structure of Programming Language
- 8. REFERENCES • CONCEPTS OF PROGRAMMING LANGUAGES TENTH EDITION ROBERT W. SEBESTA Structure of Programming Language