getter

I'm new to Java, but have some OOP experience with ActionScript 3, so I'm trying to migrate relying on stuff I know. In ActionScript 3 you can create getters and setters using the get and set keywords, meaning you create a method in the class and access data through a property of an instance of that class. I might sound complicated, but it's not. Here's an example: class Dummy{ private var _name:String; public function Dummy(name:String=null){ this._name = name; } //getter public function get name():String{ return _name; } //setter public function set name(value:String):void{ //do some

Update : This question has been revised to make it clearer. The answers below seem to reflect that this method works well. Hopefully this question can help people who need to add a get or set to an existing property. Ran into a problem today where I needed to override a base class's get -only property with both a get and set . Current consensus seems to be that this is impossible, but I think that I found a method. The general idea is to make a new property instead of directly override ing the old one, then we create a bridge method that override s the old get method with a call to the new one

I've had a long-standing assumption that deep prototype chains resulted in performance deterioration for property accessors. I was trying to explain that on hide the getter or add in the proto Object when a quick benchmark I threw together resulted in quite the opposite outcome from what I was expecting. What is going on here? Am I missing something obvious, or does this outright demonstrate that my (and others') assumption about the performance of property accessors on the prototype chain was wrong? Setup const object1 = { foo: 'Hello, World!', get bar () { return this.foo } }; const object2

How can i access a static getter from an instance of the class that implements that getter? for example, i have this class: class Component { static get isComponent() { return true; } constructor() {} } const c = new Component(); how can i call from "c" "isComponent" of "Component" class? I read around and all I found is something like that: Object.getPrototypeOf(c).isComponent but this is not working on my case because there is no "isComponent" method in Component prototype object. The above code works if I write the class like this: Component.prototype.isComponent = () => { return true; }

I'm using JavaScript objects like this: var obj = new Foob; should I pretend like there is a private way and do: obj.get('foo'); or should I just try to access directly as : obj.foo Paulpro You can actually have variables which can only be accessed through setters and getters in Javascript: function Foob(){ var foo = 5; this.getFoo = function(){ return foo; } this.setFoo = function(newFoo){ foo = newFoo; return this; } } var obj = new Foob; obj.getFoo(); // 5 obj.foo; // undefined Or if you want a generic getter/setter: function Foob(){ // You can set default values in the data object var data

I don't understand why JSR 303 (bean validation) is for the getter methods and not setter? Isn't it more logical to put it under setter method since that is the entry point into a field and validation should be checked prior to that? Annotating getters doesn't mean that validation is performed when a getter is invoked. It is just used to identify the property to which a constraint shall apply. The big advantage of putting constraints on (usually public) getters instead on (typically private) fields is that the constraints are part of the type's public API that way. They will even be added to

I have recently begun using more getter functions as opposed to direct access to make my code more flexible. I am curious what the cost of this is in terms of speed. Suppose that earth is an object and we have the following parent object: var star={} star.planet=earth star.getPlanet=function(){ return this.planet } Is there a non-negligible difference in speed between the following two statements? print(star.planet) print(star.getPlanet()) In V8: A function that is so short and doesn't have context allocated variables will get inlined. Unless of course too much inlining has already accumulated