load | 易学教程

Can a java classloader load a class more than once

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问题 Can a java classloader load a class more than once, ie load new versions of a class, without throwing a LinkageError of "duplicate class definition"? In other words, if we need to dynamically reload a class, can this be done with the same classloader, or does the classloader have to be destroyed first and a new one be created that will load the new version of the class? 回答1: A classloader can only actually load a class once! That means that it can only define it once. It can load it many

Tomcat 7 Load Balancing

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问题 Looking to implement Load balancing for two Tomcat 7 instances each on a different machine & two other Tomcat 7 instances on a different machine serving two different purpose. On Machine 1, will have two Tomcat instances TomA.1 & TomB.1 running on different ports On Machine2, will have two Tomcat instances TomA.2 & TomB.2 running on different ports Now TomA.1 & TomA.2 needs to be run in LoadBalanced fashion & similarily TomB.1 & TomB.2 needs to be run in LoadBalanced fashion. Would highly

How do you load information from a .txt file in batch?

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问题 So I have been doing some small batch programs lately but I can't manage to make the batch file load information. This is how i would do it. :load_game ) set /p something= ) > something.txt In the txt file: something_is_awesome That is it^^ If i remember it right that is how you SAVE a file... now how do you LOAD it in a similar way? Note: I would like to do multiple at once! 回答1: to WRITE a line to a file use echo my_information>something.txt (overwriting) to READ a line from a file use set

UWP 3d model loading

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问题 I have searched everywhere but can not find an answer how could I load a 3d model (.obj/.fbx...) into UWP. I tried it with Helix, but it doesn't work well on the UWP yet. I would like to rotate this model after its loaded. 回答1: You need to use <SwapChainPanel /> Here is the MSDN documentation on it Here is a tutorial on how to use it. The tutorial is for Windows 8 but there are comments from people using this in UWP. All of this was found (On Bing) in one search. This was the StackOverflow

Getting what was added upon load

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问题 Is there a way to get the list (array) of all the constants (including modules and classes) and their methods and class or instance variables that are added or redefined upon loading an external ruby file? 回答1: This should do the trick: def all_constants_with_methods constants = Object.constants.map { |sym| Object.const_get sym } Hash[constants.map { |constant| [constant, (constant.instance_methods rescue [])] }] end before = all_constants_with_methods load foo.rb after = all_constants_with

WPF hot key firing without modifier

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问题 I have a WPF window, which contains a button called Cancel. Under ordinary circumstances I want a user to be able to press Alt+C to cancel their actions and close the program. As such, the button is captioned "_Cancel." Problem 1: During Window_Load, if I press C without modifiers, the Cancel_Clicked event fires, and the program closes. Problem 2: After my program opens, assuming I don't interact with anything on the window, pressing C without modifiers will close the program. Note that, due

jQuery: load method - reload a specific part of a page without url?

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问题 i wondered if it's possible to just reload a specific div of a page without passing a url? $('a.reload').live('click', function(e) { $sv.load(" #inside") }); if I click the reload-link i want just to reload the div with the ID inside on the current page. Is there a trick on how to do so with jquery? regards 回答1: No, it's not possible, but luckily you can pass the URL for the page with window.location.href and then filter out everything but the thing you want: $('#inside').load(window.location

sIFR load before rest of page?

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Is it possible to have sIFR "preload" or load before the rest of the page content? At present it is the last thing to load (due to the text position) and as it's quite an obvious part of the page I get a huge mash-up of text replacement all in a quick flurry which is not very appealing. It looks like the site is having an epileptic fit. Once loaded, all is fine though :) Any work-arounds to the load-fitting? Cheers Hugh There are a two separate issues here: Replacing the elements as soon as possible Making the replacement as painless as possible For #1, sIFR by default replaces the elements on

Load Tframe from bpl to application

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问题 I am trying to load a tframe inside a delphi package (bpl) to be shown in my main app please give me code for both package and application. 回答1: Give a man a fish and he eats for a day, learn a man to fish and he eats his whole life. So no code for you :) How you should do it: Start Delphi, Create a new package. Add a TFrame to your bpl Save and compile, you should now have a .bpl and a .dcp. Close all Create a new application In your project properties, turn on "Build with Runtime packages"

Lazy Load on MULTIPLE horizontal containers

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问题 I'm using Lazy Load jQuery plugin: http://www.appelsiini.net/projects/lazyload My question is: is it possible to have multiple scrolling containers each with a lazyload images inside, like this: $("#container1 img.lazy").lazyload({ container: $("#container1")}); $("#container2 img.lazy").lazyload({ container: $("#container2")}); When I do this it seems to only keep track of the most recently called. I tried to call the function two times (one for each container) but it didn't work, I also