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();

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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();

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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();

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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();

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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" ;

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