What is a bytecode? and how important is it in Java?

Answer 1

In simple terms bytecodes is basically the machine readable language which is ofcourse only zeros and ones . So lets recap how our java source codes are run. Firstly our source code(human readable language) is compiled by the compiler into bycodes( machine readable language) which then the JVM runs to output our source code.

Answer 2

your java code->bytecode->Machine language