Chapter 5 declaring classes & oop
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This chapter discusses object-oriented programming concepts like encapsulation, inheritance, polymorphism, abstract classes, and exception handling in Java. Encapsulation involves making data fields private and controlling access via public methods. Inheritance allows classes to extend existing classes and polymorphism means that subclasses can override methods of the parent class. Abstract classes cannot be instantiated and serve as a base for subclasses, while exceptions are used to handle errors.
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This document provides an overview of object-oriented programming concepts in Java including classes, objects, encapsulation, inheritance, polymorphism, abstraction, overriding and overloading methods, reference variable casting, constructors and instantiation. Key points covered include defining classes and objects, using access modifiers for encapsulation, inheritance relationships between classes, polymorphism through method overriding, rules for overriding methods, and how to properly create and initialize objects using constructors.
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Chapter 5 declaring classes & oop
- 1. CHAPTER 5 DECLARING CLASSES , ENCAPSULATION , INHERITANCE , POLYMORPHISM , ABSTRACT AND EXCEPTION HANDLING
- 2. PAG WALA ENCAPSULATION MAWAWALA ANG DANGAL AT INTEGRIDAD NG PROGRAM
- 5. CLASS
- 8. METHODS
- 10. CONSTRUCTOR
- 12. Constructors are used to initialize instance variables There is always at least one constructor in every class. If a programmer does not define a constructor, the compiler automatically creates one.
- 16. Final items cannot be modified. In the case of classes and methods, it means they cannot be extended or overridden, respectively. Native methods are implemented using a language other than Java, usually C or C++. Synchronized methods can be executed by only one thread at a time. Volatile fields are eliminated from certain compiler optimizations regarding references to them. Transient fields are ones that will not be saved when an object is serialized. Static items can be referenced using the name of the class in which they are defined to access them. They are not associated with class instances, although they can be referenced using instance variables. Final items cannot be modified. In the case of classes and methods, it means they cannot be extended or overridden, respectively. MODIFIERS/ QUALIFIERS
- 21. TAGA CONTROL NG ACCESS ALSO DEFINE THE BOUNDARY OF AN OBJECT WITH IN THE PACKAGE LANG PUWEDE MAG EXPLORE
- 30. Main Class
- 31. SubClass
- 32. PRIVATE STRING NAME +setName(name:String):void +setGrade(grade:double):void () – attributes or parameter argument
- 33. This class declaration. The class body ( the area between the braces) contains all The code that provides for the objects created from the class: constructors for Initializing new objects, declaring for the fields that provide the state of the class and its object, and methods to implement the behavior of the class and its objects.
- 117. INTRODUCING FINAL VERSION OF STUDENT RECORD APPLICATION BY ENGINEER JESS DALE DELA CRUZ
- 125. STUDENT
- 137. TEACHER