change RegistryInterface.doDeleteStudent(studentID); // Static error here. with this.doDeleteStudent(studentID); Hope helped you! solved Non-static methods cannot be referenced from a static context from within the same class [duplicate]
It’s not a good practice for sure! You have two options in this case. If you would be downloading those strings every time you run a fresh app then it would be better to keep that list in a Singleton class. Or if you just want to download the first time and then probably not … Read more
All members are static. Of course they are, because if you can’t instantiate an object from that class, why would there be any non-static members? solved Can I have a non-static data member in a static class?
You are calling your methods correctly (from logical point of view) but apparently you have declared them incorrectly (as static). Make them instance methods by removing the static modifier. That should fix your problem. And learn the the difference between static and instance methods (seems you haven’t quite yet). In particular getName and setName should … Read more
Because it doesn’t make sense. Variables declared in a method are local to the method; i.e. they can’t be accessed outside the method. Why and how could these variables be modified outside the method? Code outside the method doesn’t even know of them, so you don’t need to protect them from outside code. solved Java … Read more
You just try to convert char* to int. You code should be: int number = atoi(argv[1]) 0 solved c++ Why can’t I use static_cast to convert char* to int?
If you want it static you will have to do it like this: public static Vecteur somme(Vecteur v1, Vecteur v2) { Vecteur u = new Vecteur(v1.x + v2.x, v1.y + v2.y, v1.z + v2.z); return u; } The only way to do it with just one parameter and being able to use your own values … Read more
If you think that you need to have a circular dependency like that, there’s almost certainly a design flaw. Please see: What is the XY problem? If you insist, though, something like this will actually work: public class A { public B SomeB { get; set; } public int SomeInt { get; set; } } … Read more
Are you just trying to get the list from another object? CodUtility.listaCodiciTipologiaProgetto; Will return the list. 0 solved How can I access to a public final static list declared into an utility class from another class in a Java application?
In Swift, a UInt8 is the corresponding type to C’s unsigned char, so this would create a constant array of UInt8 values: let gSalt:[UInt8] = [0xf4, 0x28, 0x32, 0xab, 0x4b, 0xa1, 0xcc, 0x43] In Swift, you should just declare this in whatever scope you need it. If it is only needed by the methods of … Read more
If you want the size() method to resize your window you need a least to declare one. I suggest you replace void setup(){ size(500,500); } with void setup(){ JFrame myFrame = new JFrame(); myFrame.setSize(500,500); myFrame.setVisible(true); } 2 solved size() command not working when containing method is run within a static method [closed]
In Java, a static method is associated with the class and may be called without an instance. And therefore cannot access instance variables either. In c++, static keyword has several meanings depending on context. A static member function (which is what class methods are typically called in c++) is quite similar to static methods in … Read more
You provided very little information about what kind of logic this would be, but in any case it should be inside the class Child. Depending on what kind of logic it is I would probably put it inside the constructor. Suppose you have the following: public class Child(){ public static int age = 1; public … Read more
What you’re looking for is a bit strange, but one option to keep them static and provide new value/implementation is to just hide the inherited members, by simply using the same name: public abstract class Effect { public const float duration = 1.0f; public static void boo() { // this prints 1.0f Console.WriteLine(duration); } } … Read more
From a static function, you can call only static function or use static variable. The linking is done at run time. So, though your compilation will be fine but at run time it will fail when call is made. Try making your function non static if you want to make that call. OR The only … Read more