Java Features -- It's Architecture-Neutral

Each client machine must run Java interpreter which performs runtime execution of Java bytecodes.

Java interpreter is written in POSIX compliant ANSI C and needs to be ported to and conventionally compiled (once) on each individual platform.

Once the interpreter is ported, application developers don't need to worry at all about platform specificity and differences between native compilers.

They write portable Java which is compiled by platform independent Java compiler and executed on Java interpreter, ported to various platforms.