Flashcards

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Jason Dang Inglês 7 flashcards

Flashcards do conjunto (7)

1AbstractionConcerning yourself with what something does rather than how it does it
2Procedural AbstractionSpecify the actions that should be performed, hiding algorithms
3Data abstractionSpecify the data data objects for a program, hiding representation
4classes in inheritance relationships-To use instances of some Object class, you need to extend and be in the same package
-Child inherits all variables and methods from parent
-Private variables needs getter/setter methods to access
5Java Interfaces-use keyword "implements"
-A contract that must be completed (whatever implements the interface has to finish the empty methods)
-Can have static methods, abstract methods, static final variables
6Abstract Classes-Usually has one or more abstract methods inside, which has no implementation yet
- Another class must "extends" the abstract class to implement the abstract methods
-Can have other regular methods which can be implemented within the abstract class (constructor and instance variables)
-Cannot create an instance of an abstract class
7Arrays- type [] name = new type[size];
-name.length for size
-name[#] = whatever, to add
-Can be a 2d array,
type [][] name = new type [row][col];