Editing GNU Classpath (section)

== Virtual machine integration ==
GNU Classpath contains classes from the official Java API namespace. Where calls to native code are necessary or highly desired, this is done from a small number of "VM" classes. The name of such a VM class matches the name of the class requiring native methods, plus the additional '''VM''' prefix: VMObject, VMString and so on. VM classes, stored separately from the rest of code, are [[Java syntax#Access modifiers|package private and final]]. The methods of these classes contain the keyword ''native'', indicating the necessity of the supporting native library. Such libraries are provided by the authors of a Java virtual machine, hence GNU Classpath can be connected to nearly any Java virtual machine if the sources of such virtual machine are available and can be modified.