Editing Comparison of C Sharp and Java (section)

=== Runtime environments ===
Java (the programming language) is designed to execute on the Java platform via the [[Java Runtime Environment]] (JRE). The Java platform includes the [[Java virtual machine]] (JVM) and a common set of libraries. The JRE was originally designed to support interpreted execution with final compiling as an option. Most JRE environments execute fully or at least partially compiled programs, possibly with [[adaptive optimization]]. The Java compiler produces [[Java bytecode]]. Upon execution the bytecode is loaded by the Java runtime and either interpreted directly or compiled to machine instructions and then executed. {{Further|Java Runtime Environment}}

C# is designed to execute on the [[Common Language Runtime]] (CLR). The CLR is designed to execute fully compiled code. The C# compiler produces [[Common Intermediate Language]] instructions. Upon execution the runtime loads this code and compiles to machine instructions on the target architecture. {{Further|Common Language Runtime}}