System.out.println not working in class

[Bud Tippins]

In the code below, why am I getting an error in the System.out.println that is inside of class Apple? One inside of main runs fine. Thank you for your help.

public class Main {

    public static void main(String[] args) {
        System.out.println("I'm gonna call apple");
        Apple myApple = new Apple();
    }

}


class Apple {
    System.out.println("I'm an apple");
}

[Stephan van Hulst]

Because you didn't call it in a method, you are calling it in a class body, which is illegal.

[Greg Brannon]

Another tip: Include all errors you're getting in your post.

[Bud Tippins]

Thank you for your help. That worked.

[marc weber]

It will also work if you simply enclose the statement in braces...

class Apple {
    { System.out.println("I'm an apple"); }
}

This surprises some people. So as a learning opportunity, can a Greenhorn explain why this works? And what triggers that code to execute?