Some JVMs are actually self-hosting: http://jikesrvm.org/ http://jikesrvm.org/ A distinguishing characteristic of Jikes RVM is that it is implemented in

Some JVMs are actually self-hosting: http://jikesrvm.org/ http://jikesrvm.org/ A distinguishing characteristic of Jikes RVM is that it is implemented in the Java™ programming language and is self-hosted i.e., its Java code runs on itself without requiring a second virtual machine. Most other virtual machines for the Java platform are written in native code (typically, C or C++). A Java implementation provides ease of portability, and a seamless integration of virtual machine and application resources such as objects, threads, and operating-system interfaces.