All Flashcards
How is the concept of calling superclass constructors applied in GUI frameworks?
When creating custom UI components, subclasses call the superclass constructor to initialize basic properties like size and position.
How is 'super' used in inheritance hierarchies for database entities?
Subclasses representing specific entity types call the superclass constructor to initialize common fields like ID and creation date.
How is the concept of calling superclass constructors applied when extending exception classes?
Custom exception classes call the superclass constructor to set the error message and other relevant information.
How is 'super' used when creating specialized data structures?
Subclasses of generic data structures (e.g., lists, trees) use 'super' to initialize the underlying data storage.
How is the concept of calling superclass constructors applied in game development?
When creating different types of game objects, subclasses call the superclass constructor to initialize common properties like position, health, and damage.
How is 'super' used in frameworks that implement design patterns like Template Method?
Subclasses call the superclass constructor to set up the basic structure of the algorithm, then implement specific steps in their own methods.
How is the concept of calling superclass constructors applied in web frameworks?
When creating custom controllers or models, subclasses call the superclass constructor to initialize framework-specific dependencies and configurations.
How is 'super' used in systems with plugin architectures?
Plugin classes call the superclass constructor to register themselves with the system and access core functionalities.
How is the concept of calling superclass constructors applied in scientific simulations?
When creating specialized simulation objects, subclasses call the superclass constructor to initialize common physical properties and simulation parameters.
How is 'super' used in embedded systems programming?
Subclasses representing specific hardware components call the superclass constructor to initialize device drivers and communication protocols.
What are the differences between explicit and implicit calls to the superclass constructor?
Explicit: uses 'super()', programmer-defined arguments | Implicit: auto-inserted by Java, no-argument constructor
What are the differences between calling 'super()' with arguments and calling it without arguments?
With arguments: calls a specific superclass constructor with matching parameters | Without arguments: calls the no-argument constructor of the superclass
What are the differences between initializing instance variables in a superclass constructor vs. a subclass constructor?
Superclass: initializes inherited variables | Subclass: initializes variables specific to the subclass
What are the differences between the roles of the superclass and subclass constructors in object creation?
Superclass: initializes the inherited state and behavior. Subclass: Extends the superclass and initializes its own state and behavior.
What are the differences between the effects of calling 'super()' and not calling 'super()' in a subclass constructor?
Calling 'super()': ensures superclass initialization | Not calling 'super()': relies on implicit call to no-argument constructor (if it exists), may lead to errors if it doesn't exist.
What are the differences between how constructors are inherited vs. how methods are inherited?
Constructors: are not inherited, must be explicitly called using 'super()' | Methods: are inherited and can be overridden.
What are the differences between the purpose of a constructor in a superclass versus a subclass?
Superclass: initializes the common state of all its subclasses. Subclass: initializes its own state and potentially extends the superclass's state.
What are the differences between the flexibility of explicit vs. implicit superclass constructor calls?
Explicit: allows choosing which superclass constructor to call with specific arguments. Implicit: only calls the no-argument constructor.
What are the differences between the consequences of an exception thrown in a superclass constructor vs. a subclass constructor?
Superclass: can prevent the entire object from being created if not handled. Subclass: can be handled within the subclass, allowing partial object creation or alternative initialization.
What are the differences between the visibility of constructors in superclasses vs. subclasses?
Superclass: determines who can create instances of the superclass directly. Subclass: inherits visibility rules but can only call the superclass constructor through 'super()'.
What is the definition of 'Superclass'?
A class from which other classes (subclasses) inherit attributes and methods.
What is the definition of 'Subclass'?
A class that inherits attributes and methods from another class (superclass).
What is the definition of the 'super' keyword?
A keyword used to call the superclass's constructor or access its members from the subclass.
What is the definition of 'Constructor'?
A special method used to initialize objects of a class.
What is the definition of 'Inheritance'?
A mechanism where a class acquires the properties (attributes and methods) of another class.
What is the definition of 'No-argument constructor'?
A constructor that takes no arguments.
What is the definition of 'Explicit constructor call'?
A constructor call made directly in the code, using the 'super' keyword.
What is the definition of 'Implicit constructor call'?
A constructor call automatically inserted by the compiler when no explicit call is made.
What is the definition of 'Object class'?
The ultimate superclass of all classes in Java.
What is the definition of 'Instance variable'?
A variable defined in a class (i.e., a member variable) for which every object of the class has its own copy.