Javascript-OOP

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Inhaltsverzeichnis

1 Kapselung von Daten
2 Vererbung
3 Überschreiben von Methoden
4 Polymorphie

Kapselung von Daten

function ClassName(param) {
 var wert = param;
 this.GetWert = function() {
  return wert;
 }
}

var Objekt = new ClassName(42);
Objekt.GetWert();

Vererbung

function SuperClass(param1, param2) {
 var a = param1;
 var b = param2;
 this.GetA = function() {
  return a;
 }
 this.GetB = function() {
  return b;
 }
}

var SuperObjekt = new SuperClass(1, 2, 3);
SuperObjekt.GetA();

function SubClass(param1, param2, param3) {
 SuperClass.call(this, param1, param2);
 var c = param3;
 this.GetC = function() {
  return c;
 }
}

var SubObjekt1 = new SubClass(1, 2, 3);
SubObjekt1.GetC();

Überschreiben von Methoden

function SubSubClass(param1, param2, param3) {
 SubClass.call(this, param1, param2, param3);
 var c = param1 + param2 + param3;
 this.GetC = function() {
  return c;
 }
}

var SubObjekt2 = new SubSubClass(1, 2, 3);
SubObjekt2.GetC();

Polymorphie

function AbstractClass() {
 var a = 0;
 var b = 0;
 var c = 0;
 this.GetA = function() {
  return a;
 }
 this.GetB = function() {
  return b;
 }
 this.GetC = function() {
  return c;
 }
}

SuperClass.prototype = new AbstractClass();
SubClass.prototype = new AbstractClass();
SubSubClass.prototype = new AbstractClass();

var TestObjekt1 =  new SuperClass(1, 2);
var TestObjekt2 =  new SubClass(2, 3, 4);
var TestObjekt3 =  new SubSubClass(5, 6, 7);
TestObjekt1.GetC() + "\n" + TestObjekt2.GetC() + "\n" + TestObjekt3.GetC() + "\n" ;

Javascript-OOP

Inhaltsverzeichnis

Kapselung von Daten

Vererbung

Überschreiben von Methoden

Polymorphie

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