Question

我有一个trick切的问题。

我的java方案正在从事这样的活动:

住宿:

And where the problem is.

When I run this program in debug mode it behaves as I expect, so if external file changed classloader loads new version of class and executes new version (if file didn t change it loads old version also of course).
But when I run this program NOT in a debug mode it always executes old version despite the fact that the readed file has changed.

也许有人更深入地了解轮班问题,而多国公司的行为可以向我解释这种行为。

Answer 1

Here s a simplified version of what happens:

The JVM loads classes and other resources into the classpath exactly once (unless running in debug mode) from the directories or Jars specified in the CLASSPATH environment variable.
To do this, it uses ClassLoaders
Once a resource has been loaded by a ClassLoader instance, it remains in memory until the ClassLoader is garbage collected.

减速模式是国际交易日志提供的一种特殊模式,舱载人更努力地向您提供最新版本的资源。

Answer 2

不可能用同级装载机重载同一类别。

you can find a well written article about dynamic class re/loading here