static-methods | 易学教程

AspectJ LTW in eclipse - Pointcut does not work with static method

阅读更多关于 AspectJ LTW in eclipse - Pointcut does not work with static method

I have an Aspect class, which defines one point-cut expression as below @Pointcut("execution(* com.vg.pw.tasks.shared.*.executeTasks(..))") public void myTraceCall() {} where the executeTasks() method is static. If the method is made to non-static, the method body is executed on every call of executeTasks() . Why is my pointcut not effective on static methods? I'm using LTW and not spring. I just tried out your pointcut expression and it works on both static and non-static methods just as it should. I used AspectJ weaver 1.8.7. Try adding -showWeaveInfo and -verbose to your aop.xml for debug

communication between two device using sms

阅读更多关于 communication between two device using sms

I want my program to be able to receive sms from a special number("+9856874236"). I want application to be recive SMS ,if the SMS is contain "enable wifi" ,then change wifi to enable i 'm using this code but it working crash?? MainActivity package com.example.sms; import android.app.Activity; import android.content.Context; import android.net.wifi.WifiManager; import android.os.Bundle; import android.view.Menu; import android.widget.TextView; public class MainActivity extends Activity { static TextView messageBox; static String x=""; static Context context; @Override protected void onCreate

Calling a static method from a class in another namespace in PHP

阅读更多关于 Calling a static method from a class in another namespace in PHP

问题 This code bellow gives me this error : Class 'MyNamespace\Database' not found . How do I reference a class that belongs to no namespace, from inside one ? Class Database { public function request() { } } namespace MyNamespace { class MyClass { public function myFuction() { Database::request(); } } } 回答1: Try with \Database::request(); Also see Namespace Basics Example 1 in the PHP Manual 来源： https://stackoverflow.com/questions/6579040/calling-a-static-method-from-a-class-in-another-namespace

Can a Static method access a private method of the same class?

阅读更多关于 Can a Static method access a private method of the same class?

问题 I have this question because of the singleton/named constructor. In both cases, the real constructors are protected or private, neither of which can be accessed from outside. For example, a short named constructor is this: class A { public: static A createA() { return A(0); } // named constructor private: A (int x); }; int main(void) { A a = A::createA(); } I thought static method can only access static data member, or access private data/method via an existing object. However, in the above

Why PHP uses static methods in object context?

阅读更多关于 Why PHP uses static methods in object context?

问题 I have the following code (like, for real, this is my real code) : <?php class Foobar { public static function foo() { exit('foo'); } } When I run $foobar = new FooBar; $foobar->foo() it displays foo . Why would PHP try to use a static method in an object context ? Is there a way to avoid this ? Ok you guys didn't get my problem : I know the differences between static and non static methods and how to call them. That's my whole point, if I call $foobar->foo() , why does PHP tries to run a

Why can I only access static members from a static function?

阅读更多关于 Why can I only access static members from a static function?

问题 I have a static function in a class. whenever I try to use non static data member, I get following compile error. An object reference is required for the nonstatic field, method, or property member Why is it behaving like that? 回答1: A non-static member belongs to an instance. It's meaningless without somehow resolving which instance of a class you are talking about. In a static context, you don't have an instance, that's why you can't access a non-static member without explicitly mentioning

HttpContext.Current.Response inside a static method

阅读更多关于 HttpContext.Current.Response inside a static method

问题 I have the following static method inside a static class. My question is it safe to use HttpContext.Current.Response inside a static method? I want to be 100% sure that it is thread safe and is only associated with the calling thread.. Does anybody know the answer? public static void SetCookie(string cookieName, string cookieVal, System.TimeSpan ts) { try { HttpCookie cookie = new HttpCookie(CookiePrefix + cookieName) {Value = cookieVal, Expires = DateTime.Now.Add(ts)}; HttpContext.Current

Javascript “this” in static methods

阅读更多关于 Javascript “this” in static methods

I have a code like that: User = function(){} User.a = function(){ return "try"; } User.b = function(){ } From User.b() I can call User.a() using: User.b = function(){ return User.a(); } but not using this since it's not an instance of user (User.a() and User.b() are something like "static methods"). What i want to do is to be able to call User.a() from User.b() without knowing which is the main function, in this case User. Something like this to be used in static methods. In reality there is no methods or static methods in js, there's just functions that are assigned to object properties

C# interface cannot contain operators

阅读更多关于 C# interface cannot contain operators

问题 Can anyone please explain why C# interfaces are not allowed to contain operators? Thanks. 回答1: C# operators have to be static. Interfaces, by definition, apply to instances. There is no mechanism to require a type to implement static methods. 回答2: You can't define operators on interfaces because a class can implement multiple interfaces. Imagine if this code were possible: static class Fooness { public static operator==(IFoo l, IFoo r) { ... } } static class Barness { public static operator==

Using class/static methods as default parameter values within methods of the same class

阅读更多关于 Using class/static methods as default parameter values within methods of the same class

问题 I'd like to do something like this: class SillyWalk(object): @staticmethod def is_silly_enough(walk): return (False, "It's never silly enough") def walk(self, appraisal_method=is_silly_enough): self.do_stuff() (was_good_enough, reason) = appraisal_method(self) if not was_good_enough: self.execute_self_modifying_code(reason) return appraisal_method def do_stuff(self): pass def execute_self_modifying_code(self, problem): from __future__ import deepjuju deepjuju.kiss_booboo_better(self, problem)