package com.name;

public class Main {
    public static void main (String [] args) {
        System.out.println("I have made it");
    }
}

java Main

java com.name.Main

Error: Could not find or load main class Main

java version "1.8.0_191"
Java(TM) SE Runtime Environment (build 1.8.0_191-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.191-b12, mixed mode)

/Library/Java/JavaVirtualMachines/jdk1.8.0_191.jdk/Contents/Home