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Alex Rivera
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I have the following code: import com.apple.dnssd.*; public interface IServiceAnnouncer { public void registerService(); public void unregisterService(); public boolean isRegistered(); } class HelloWorld { public static void main(String[] args) { System.out.println("Hello, World!"); } } This code is saved in a file called "HelloWorld.java". The Java compiler complains about this code. It writes that the class IServiceAnnouncer is public and it should be declared in a file called "IServiceAnnouncer.java". I have several questions about this: Why would the compiler say that IServiceAnnouncer is a class? It's an interface. Or interface is a partial case of a class? If I put the interface IServiceAnnouncer in a separate file called "IServiceAnnouncer.java" (as the compiler wants), how then can I use it from the "HelloWorld.java"? What does public interface mean? What is the difference between a public interface and non-public one?
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