Why does this Anonymous Class test not work?

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

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The Anonymous Class test does not work because the code is missing the closing curly brace for the interface declaration. The correct code should be:

public class App {
    // Wohoo! App class!

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

    public static void main(String[] args) {
        HelloWorld hello = new HelloWorld() {
            @Override
            public void greet() {
                System.out.println("Hello World!");
            }

            @Override
            public void greetSomeone(String someone) {
                System.out.println("Hello " + someone + "!");
            }
        };

        hello.greet();
        hello.greetSomeone("John");
    }
}

In this code, an anonymous class is created that implements the HelloWorld interface. The greet() and greetSomeone() methods are overridden within the anonymous class, and then an instance of this anonymous class is created and used to call the methods.