Why does this Anonymous Class not work?

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<@&987246399047479336> please have a look, thanks.

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The code provided is incomplete and does not include the closing brackets and semicolons for the class and interface declarations.

To fix the issue, you need to complete the code by adding the necessary closing brackets and semicolons. Here's an example of how it should look:

public class App {
    // Wohoo! App class!

    interface HelloWorld {
        public void greetSomeone(String someone);
    }

    public void AnonymousClass() {
        HelloWorld helloWorld = new HelloWorld() {
            @Override
            public void greetSomeone(String someone) {
                System.out.println("Hello " + someone);
            }
        };

        helloWorld.greetSomeone("John");
    }

    public static void main(String[] args) {
        App app = new App();
        app.AnonymousClass();
    }
}

In this example, I added a method called AnonymousClass() that creates an instance of the HelloWorld interface using an anonymous class. The greetSomeone() method is implemented within the anonymous class to print a greeting message. Finally, in the main() method, I created an instance of the App class and called the AnonymousClass() method to execute it.