Running Java on Cloud 9

Question

I really want to use Cloud 9 (http://c9.io) to run java and I try

javac file.java

then

java file.class

But I always get this

Error: Could not find or load main class

How can I fix this and is there an easier way to run the program and do you need the program (It's just a small test one)

(This is my first post, I tried looking for other answers and couldn't find anything, but if its in the wrong place sorry)

Answer 1

try java file instead of java file.class