static-block

问题 This question already has answers here : Why doesn't Java allow to throw a checked exception from static initialization block? (8 answers) Closed 5 years ago . In a hypothetical situation I have a class like this: import java.io.File; import java.util.Scanner; class X { static Scanner scanner; static { scanner = new Scanner(new File("X.txt")); } } When compiling, I get unreported exeption java.io.FileNotFoundException ; must be caught or declared to be thrown because public Scanner(File

问题 I have a static block (Identifier is mega_menu ) It has some code like this: <ul class="dropdown-menu" role="menu"> <li data-submenu-id="submenu-patas"> <div id="submenu-patas" class="popover"> <h3 class="popover-title">Patas</h3> <div class="popover-content"><img src="img/patas.png"></div> </div> </li> <li data-submenu-id="submenu-snub-nosed"> <div id="submenu-snub-nosed" class="popover"> <h3 class="popover-title">Golden Snub-Nosed</h3> <div class="popover-content"><img src="img/snub-nosed

问题 What is the real difference between a C# static constructor and a Java static block? They both must be parameterless. They are both called only once, when the related class is first used. Am I missing something, or are they the same thing, just with different names? 回答1: They are equivalent, except that a C# class can only have one static constructor (plus static field initializers). Also, in C#, a static constructor will apply the beforefieldinit flag. 回答2: They look the same, the following

问题 What is the real difference between a C# static constructor and a Java static block? They both must be parameterless. They are both called only once, when the related class is first used. Am I missing something, or are they the same thing, just with different names? 回答1: They are equivalent, except that a C# class can only have one static constructor (plus static field initializers). Also, in C#, a static constructor will apply the beforefieldinit flag. 回答2: They look the same, the following

问题 I have this library which involves some static initialization code which needs to run before main() . It all works well if you just compile all of the translation units together, but it doesn't work if I provide a static library ( .a file) and have users link their application against it - the linker simply ignores the symbols which do my static initialization. Alternatively, I can make the linker pick up everything in the static library, if I specify the -Wl,--whole-archive option to GCC, i

问题 What is Scala equivalent of Java's static block ? 回答1: Code in the constructor (that is, the body) of the companion object is not precisely the same as code in a static initialiser block of a Java class. In the example below, I create an instance of A, but the initialization does not occur. scala> object Test { class A; object A { println("A.init") }} defined module Test scala> new Test.A res3: Test.A = Test$A@3b48a8e6 scala> Test.A A.init res4: Test.A.type = Test$A$@6e453dd5 To trigger

问题 What is Scala equivalent of Java's static block ? 回答1: Code in the constructor (that is, the body) of the companion object is not precisely the same as code in a static initialiser block of a Java class. In the example below, I create an instance of A, but the initialization does not occur. scala> object Test { class A; object A { println("A.init") }} defined module Test scala> new Test.A res3: Test.A = Test$A@3b48a8e6 scala> Test.A A.init res4: Test.A.type = Test$A$@6e453dd5 To trigger

问题 This question already has answers here : What's the C++ idiom equivalent to the Java static block? (6 answers) Closed 9 months ago . I want to know that what is static block in c or c++ with an example? I know what is static but what is the difference between static and static block? 回答1: Another alternative is that you might be looking for the analogy of a static block in Java. A block of code that is run when the application is loaded. There is no such thing in C++ but it can be faked by

问题 I have a class with some static members, and I want to run some code to initialize them (suppose this code cannot be converted into a simple expression). In Java, I would just do class MyClass { static int myDatum; static { /* do some computation which sets myDatum */ } } Unless I'm mistaken, C++ does not allow for such static code blocks, right? What should I be doing instead? I would like solution for both of the following options: Initialization happens when process loads (or when the DLL

问题 I am creating a new email template to replace the defaults on Magento. Having taken some code directly I googled how to add static blocks and followed these basic and brief instructions: http://www.webcenter.co.in/insert-cms-static-block-into-transactional-email-template-in-magento/ This didn't work for me and resulted in blank spaces when the email was sent and (when viewing the HTML file in chrome, the code appears separate: Example of email previewed in chrome I don't really understand why