How to compile the first basic code?

Question

I entered the code into notepad, but unable to operate it into the command prompt and execute. How to execute it into command prompt or any other platform?

Answer 1

for compilation on command prompt
type javac filename.java

Answer 2

Any error messages?
Just to be sure: Did you install jdk and set the path in the system environment?

Answer 3

for java the best thing you can do is installing eclipse.
that will make life easy for you,