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Another way to bring together classes into modules is to place them in
single-class compilation units, which you then bring together into a common
package, using a package statement at the beginning of
each such compilation unit.
In general, the package names that appear in package statements consist of
components separated by dots:
package onto.java.entertainment;
public abstract class Attraction {
// Remainder of class definition
}
package onto.java.entertainment;
public class Movie extends Attraction {
// Remainder of class definition
}
package onto.java.entertainment;
public class Symphony extends Attraction {
// Remainder of class definition
}
package onto.java.entertainment;
import java.io.*;
import java.util.*;
public class Auxiliaries {
// Remainder of class definition
}