Karteikarten
fak off
Karten in diesem Stapel (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];
Informationen
- Beschreibung
- Karteikarten am fak off, erstellt von Jason Dang am 12/12/2019.
- Erstellt von
- Jason Dang
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