When i try to run/compile a java file with Geany it spits out an error

Question

i wanted to learn java, and for text editor i use geany, i wanted to run this code:

public class Main {
        public static void main(String args[]) {
                System.out.print("Java!");
        }
}

But when i run it, it gives me this error:

Error: Could not find or load main class main Caused by: java.lang.ClassNotFoundException: main

I installed the latest java se, setted up the enviroment variables, and edited the compile and launch options for java in geany. Nothing works.