Defining A Class In Source Code File?

"If you define a public class or an interface in your class, then it should match the name of the java source code file."

Does the statement above mean the following should compile fine ?

public class Animal{
public class Animal{ }
}

The author gives an example saying that if you have a class Multiple.java and in that class, you have:

public class Multiple{}, then it should compile.

But this does not compile. I tried it.