Java compiler/interpreter

Question

Why we do we say that Java is a compiled and interpreted language?

What is the advantage of this (being compiled and interpreted)?

Answer 1

Why do we say Java is compiled and interpreted language.

Because source code (.java files) is compiled into bytecode (.class files) that is then interpreted by a Java Virtual Machine (also known as a JVM) for execution (the JVM can do further optimization but this is anoher story).

What is the advantage over this(being compiled/interpreted)

Portability. The same bytecode can be executed on any platform as long as a JVM is installed ("compile once, run anywhere").