What are the differences between a Just-in-Time-Compiler and an Interpreter?

Question

What are the differences between a Just-in-Time-Compiler and an Interpreter, and are there differences between the .NET and the Java JIT compiler?

Answer 1

When the first time a class is referenced the JIT Execution Engine re-compiles the .class files (primary Binaries) generated by Java Compiler containing JVM Instruction Set to Binaries containing HOST system’s Instruction Set. JIT stores and reuses those recompiled binaries from Memory going forward, there by reducing interpretation time and benefits from Native code execution.

On the other hand a plain old java interpreter interprets one JVM instruction from class file at a time and calls a procedure against it.

Find a detail comparison here http://bitshub.blogspot.com/2010/01/Flavors-of-JVM.html