The Java virtual machine is a program whose purpose is to execute other programs. ... Implementing the JVM specification results in an actual software program, which is a JVM implementation.

Truthfully, running a program compiled by GCJ is not always noticeably faster than running it on a JIT-based Java implementation; sometimes it even may be slower, but that usually is because we have ...

However, inheritance isn't the best way to implement the open-closed principle in Java. Open-closed principle example. Here is a simple example of a class that fails to implement the open-closed ...