Import package and how to use all classes in a java file

Question

I am creating a package com.XXXX Inside that I am declaring many classes in a java file (default - not public)

let is be like:

class A{}
class B{}
class C{}

I am importing com.XXXX in another file

I am unable to use these classes that are inside the package, as they are not public.

So I am pushing to a state of creating individual files for each classes.

Every class is just a small structure, where it doesn't have any extra function. So I thought of keeping them in single file. So I can't declare classes as public

Is there any way to use all classes without splitting them into separate files?

Answer 1

If (somehow) it makes sense to group these classes together, then you could put them inside a wrapper class as static inner classes, for example:

package com.somewhere;

public class Utils {
    public static class DateUtils {
        public static Date today() {
            return new Date();
        }
    }

    public static class FilenameUtils {
        public static String stripExtension(String path) {
            return path.substring(0, path.lastIndexOf("."));
        }
    }
}

Then, you will be able to import these elsewhere:

package com.elsewhere;

import com.somewhere.Utils;

public class Task {
    Date today = Utils.DateUtils.today();
}