instance

Is it possible to access an instance of a variable in one class from another class in Java. Let's say you have the following in Class A: private BlockingQueue<byte[]> buffer = new LinkedBlockingQueue<byte[]>(); I want to make changes to the queue in this class and then be able to use to access it from another class. How would i access the instance of buffer from another class? Is it even possible? Add a getter: public class Whatever { private BlockingQueue<byte[]> buffer = new LinkedBlockingQueue<byte[]>(); public BlockingQueue<byte[]> getBuffer() { return buffer; } } Then if you have an

Is it right to make a structure's instance this way? public struct Barometer { public var pressure: Int public init(pressure: Int) { self.pressure = pressure } } var barometer: Barometer = 80 Or I need to adopt a protocol? You can make that work by adopting the IntegerLiteralConvertible protocol: extension Barometer: IntegerLiteralConvertible { public init(integerLiteral value: Int) { self.init(pressure: value) } } Now a Barometer value can be instantiated from a literal integer: let barometer: Barometer = 80 print(barometer) // Barometer(pressure: 80) But note that this works only with

Can anyone explain to me why java allows you to access static methods and members from an instance? A bad example, if I have a class called RedShape and it has a static method called getColor() which returns "red", why does java allow you to call the static method from an instance of RedShape? To me this seems to violate some of the core concepts of OO language design. At the least, it should come with a compiler warning. Thanks in advance. Edit: In particular, I'm asking about when you have something like RedShape test = new RedShape(); test.getColor(); where getColor is a static method of

In matplotlib , a common problem are unwanted white lines between Patch objects drawn with pcolor , pcolormesh , and contourf (see this thread for the former two and this thread for the latter). I've attempted to fix this automatically by adding new methods to my Axes class/subclass instances using MethodType . I do this instead of subclassing simply because I want to generate Axes by passing slices of GridSpec objects to the add_subplot method on a Figure instance, and I am not aware of how I could do this with some kind of subclassed matplotlib.axes.Subplot (but I welcome advice). Here is

class MyClass: def myMethod(self): pass myInstance = MyClass() methodReference = myInstance.myMethod Now can you get a reference to myInstance if you now only have access to methodReference ? methodReference.im_self and by a similar token, for the class: methodReference.im_class For this kind of code discovery you should install iPython and use tab, for instance, in your case myReference.+TAB would give: In [6]: methodReference. methodReference.im_class methodReference.im_func methodReference.im_self Hence, you don't need to worry about remembering things so much - you know that the method is

I have a 'loader app' that loads a menu and when user clicks the menu image button a list view opens based on the text (if text = employee) (Go to class A) (Go to class B) ... ... (Show List View Window) if he clicks again on the same button it opens again, I would like to prevent this. i.e but this for a WPF application If you want a list of the open forms, that is Application.OpenForms . You could iterate over this, using GetType() and checking the .Assembly to find those from a different assembly. Beyond that, I'm not entire clear on the question... Assembly currentAssembly = Assembly

I'm working on some sort of online multiuser editor / coop interface, which will be doing a lot (as in, thousands) of ajax requests during one page lifetime. What would be best: ('best' in terms of stability, compatibility, avoiding trouble) Create one XMLHttpRequest object and reuse that for every HTTP request Create a new XMLHttpRequest object for every HTTP request Manage a dynamic 'pool' of XMLHttpRequest objects, creating a new one when starting a HTTP request and no existing object is available, and tagging a previously created object as 'available' when its last request was completed

i want to ask, how to change only fill color of an instance on the stage - i can do it by using ColorTransform object, but it changes color of the whole instance, not just the fill. I want to change only the fill color, not the stroke color. can anybody help me? this is my code: function paint(){ var myColorTransform:ColorTransform = new ColorTransform(); myColorTransform.color = someColorNumber; coloredObject.transform.colorTransform = myColorTransform; } This cant be done once you've drawn a shape as action script has no way of determining what is a stroke and what is a fill. You have a