My scenario:

I have a Main.java file that simply does `System.out.println("Hello")`.
I run it by first, compiling with `javac Main.java` and then excecuting the command `java Main`.

Now what I want is that instead of printing "Hello", it will print whatever the user wants, but *I don't want to change the source code whenever I want a different output*. So I replaced the `System.out.println("Hello")` with `System.out.println(${MESSAGE})`. But this gives error "Cannot resolve symbol MESSAGE".

Ultimately, I want a Main.class file and run with something like `java Main -env MESSAGE=whateverIPutHere` and it should print out whateverIPutHere.

Is it possible?