title: Java : when a class need to be loaded in a JVM twice and more?
body: <p>When I read something about JVM, it tells me that the namespace of JVM can identify a class loaded in the JVM, only the full name of the class is not useful! When or on which circumstance a class will be loaded in the jvm(I mean the same jvm) twice and more? Is this way a useful way?</p>