class

问题 I have already created a class and a subclass and have a bunch of code in both. I've created an interface in the parent class and I have no idea how to make my child class implement the interface :/ The code is: class Car { public interface ISmth { void MyMethod(); } } class MyCar : Car { //implement the interface } 回答1: This is how your code should probably be laid out. public interface ISmth { void MyMethod(); } class Car { } class MyCar : Car, ISmth { public void MyMethod() { } } There

问题 Is there a good class that can count the occurrences of specific strings in java? I'd like to keep a list of names and then create unique email addresses for each name. For each occurrence of a last name, I'd like to increment the associated number by one. Ex: If I have 3 people with the last name Smith, I'd like their address to be smith1@(Address), smith2@(Address), and smith3@(Address). I saw a class "Map" but I can't seem to initialize it correctly. Is there a class that I can use to keep

问题 I'm able to compile and run my code but there is always an error showing in VSCode. Earlier there was a pop up I don't remember what and I clicked "apply globally" and it's been this way since. Output is there but so is the error The declared package "" does not match the expected package 来源： https://stackoverflow.com/questions/54718171/the-declared-package-does-not-match-the-expected-package

问题 I'm able to compile and run my code but there is always an error showing in VSCode. Earlier there was a pop up I don't remember what and I clicked "apply globally" and it's been this way since. Output is there but so is the error The declared package "" does not match the expected package 来源： https://stackoverflow.com/questions/54718171/the-declared-package-does-not-match-the-expected-package

问题 I'm trying to find a way to check if a string is parsable as a specific type. My use case is : I've got a dynamic html form created from a map of field (name and type) In my controller I get back the form values from the http request as strings I'd like to check if the retrieved string is parsable as the wanted type, in order to display an error message in the form if this is not possible. Does someone know a way to check if the parsing is possible without testing each type one by one ?

问题 I'm trying to find a way to check if a string is parsable as a specific type. My use case is : I've got a dynamic html form created from a map of field (name and type) In my controller I get back the form values from the http request as strings I'd like to check if the retrieved string is parsable as the wanted type, in order to display an error message in the form if this is not possible. Does someone know a way to check if the parsing is possible without testing each type one by one ?

问题 I have asp.net repeater on a page. If each item being repeated is wrapped in a label like so: <label class="ItemName">value</label> If this label contains the text '35' I want to display some text next to it. How can i do this using jquery??? jQuery(document).ready(function () { if ($('.ItemName').val().indexOf("35")) { $(this).val() = $(this).val() + "some text"; } }); 回答1: The this in the .ready function should refer to the document . To get the text content, use .text() instead of .val() .

问题 I know that similar to this question was asked before, but mine is a little bit more different. I tried most of the previously suggested solutions, but none of them work. So the problem is that I've got two classes as shown: public class Dog { public String Name { get; set; } public int Age{ get; set; } } public class Person { public String First_Name { get; set; } public String Last_Name { get; set; } public Dog dog { get;set;} } Also, I have a list of People List < Person > that I am

问题 Guys, I've come across such legal behaviour: File B.java: final class C {} final class D {} File A.java: class B {} public class A {} Questions: When class X is required to be placed into its own X.java file? Does class visibility/final matter here? Is there any official spec on this class/java relation? Thanks a lot. 回答1: The de-facto standard in most implementations is that a source file can only contain one top-level public type definition. The name of the source file must be the name of

问题 In tutorials I have seen two types of instance attribute naming for the purpose of using @property. Here is code showing examples of both. They also seem to work differently. class A: def __init__(self, x): self.x = x @property def x(self): return self.__x @x.setter def x(self, x): if x > 1000: self.__x = 1000 else: self.__x = x # Instance attribute __x defined outside __init__ class B: def __init__(self, x): self._x = x @property def x(self): return self._x @x.setter def x(self, x): if x >