field

问题 I have this error called Inconsistent accessibility: field type 'world' is less accessible than field 'frmSplashScreen' In my code there is a public partial class called frmSplashScreen There is also a public class called world The line that caused the error was: private world currentWorld; The above line is in the class frmSplashScreen What is causing the problem? 回答1: Generally this happens because your field is private . You must change it to public : public world currentWorld; For more on

问题 Is it possible in Java to get a name of field in string from the actual field? like: public class mod { @ItemID public static ItemLinkTool linkTool; public void xxx{ String fieldsName = *getFieldsName(linkTool)*; } } PS: I'm not looking for a field's class/class name or getting Field from name in String. EDIT: When I'm looking at it I probably wouldn't need a method to get a field's name, the Field instance (from field's "code name") would suffice. [e.g. Field myField = getField(linkTool) ]

问题 I'd like to create a class where the client can store a lambda expression like []() -> void {} as a field of the class, but I can't figure out how to do so. One answer suggested using decltype, which I tried with no success. Here is a ideone source link. The below is the source and result: #include <cstdio> auto voidLambda = []()->void{}; class MyClass { public: decltype(voidLambda) t; MyClass(decltype(voidLambda) t) { this->t = t; } }; int main() { MyClass([] { printf("hi"); }); } Result:

问题 I need help with adding Cyrillic value to a field using the PDFBox API . Here is what I have so far: PDDocument document = PDDocument.load(file); PDDocumentCatalog dc = document.getDocumentCatalog(); PDAcroForm acroForm = dc.getAcroForm(); PDField naziv = acroForm.getField("naziv"); naziv.setValue("Наслов"); // this part right here naziv.setValue("Naslov"); // it works like this It works perfect when my input is in Latin Alphabet. But I need to handle Cyrillic inputs as well. How can I do it?

问题 This question already has answers here : self referential struct definition? (9 answers) Closed 2 years ago . struct node{ struct node next; int id; } gives "field next has incomplete type error ". what is wrong with this struct ? 回答1: When creating a self-referential data type, you need to use pointers to get around problems of circularity: struct node; struct node { struct node * next; int id; } ...should work, but take care to allocate memory correctly when using it. Why a pointer?

问题 I have a field in a class with a random name like: class Foo { public string a2de = "e2" } I have the name of this field in another variable like: string vari = "a2de" Can I get or set the value of field a2de by using the value of vari ? like: getvar(vari) or setvar(vari) = "e3" 回答1: You have to use reflection. To get the value of a property on targetObject : var value = targetObject.GetType().GetProperty(vari).GetValue(targetObject, null); To get the value of a field it's similar: var value

问题 Within a class, a field that has the same name as a field in the superclass hides the superclass's field. public class Test { public static void main(String[] args) { Father father = new Son(); System.out.println(father.i); //why 1? System.out.println(father.getI()); //2 System.out.println(father.j); //why 10? System.out.println(father.getJ()); //why 10? System.out.println(); Son son = new Son(); System.out.println(son.i); //2 System.out.println(son.getI()); //2 System.out.println(son.j); /

问题 While reading Jon Skeet's article on fields vs properties he mentions that changing fields to properties is a breaking change. I would like to understand the common scenarios in which this change can cause breaks. Along with the scenario, if you can, please provide any details. For starters, the following points have been mentioned elsewhere: You can't change fields to properties if you are using reflection on the class. This is obvious even though I don't have details. Serialization is one

问题 class LoginForm(forms.Form): nickname = forms.CharField(max_length=100) username = forms.CharField(max_length=100) password = forms.CharField(widget=forms.PasswordInput) class LoginFormWithoutNickname(LoginForm): # i don't want the field nickname here nickname = None #?? Is there a way to achieve this? Note: i don't have a ModelForm , so the Meta class with exclude doesn't work. 回答1: You can alter the fields in a subclass by overriding the init method: class LoginFormWithoutNickname(LoginForm

问题 When I write a class I always expose private fields through a public property like this: private int _MyField; public int MyField { get{return _MyField; } When is it ok to just expose a public field like this: public int MyField; I am creating a structure called Result and my intention is do this: public Result(bool result, string message) { Result = result; Message = message; } public readonly int Result; public readonly int Message; What is the best practice? Is it ever ok to do this? 回答1: