Java doesn't see the main class despite having one. How to fix it?

Question

Java

The code

// c://projects/java/learn.java
public class learn {
    public static void main(String[] args) {
        System.out.println("Hello, World");
    }
}

Mistake

c:\projects\java>javac learn.java
c:\projects\java>java learn.class
Error: Could not find or load main class learn.class
Caused by: java.lang.ClassNotFoundException: learn.class

Answer 1

>java learn