The Default Constructor

If a class is public and has a default constructor - i.e. the constructor you get when you don't specify one - then the default constructor you get will be public.

package dungeon;

public class Skeleton {
    // No constructor specified
}

package village;

import dungeon.Skeleton;

class Main {
    void main() {
        // We can say `new Skeleton()` here
        var skeleton = new Skeleton();
    }
}

If you write out a constructor yourself this will not be the case.

package dungeon;

public class Skeleton {
    public final int bones;

    Skeleton() {
        this.bones = 206;
    }
}

package village;

import dungeon.Skeleton;

class Main {
    void main() {
        // Now "new Skeleton()" will not work.
        var skeleton = new Skeleton();
    }
}