Bytecode can then be interpreted or undergo just-in-time compilation by the JVM to native machine code. For all its safety, Java has never been revered for its performance.

A JVM is a simple stack-based CPU with no general-purpose programmable registers. Its instruction set is called bytecode. Code and data are organized in JVM classes (to which Java classes are ...

Java is an open source code, meaning it is free for all to download, which Oracle says happens about 1billion times per year making it by a large margin the world’s most popular download.