Private class declaration [duplicate]

Answer 1

You can't have private class but you can have second class:

public class App14692708 {
    public static void main(String[] args) {
        PC pc = new PC();
        System.out.println(pc);
    }
}

class PC {
    @Override
    public String toString() {
        return "I am PC instance " + super.toString();
    }
}

Also remember that static inner class is indistinguishable of separate class except it's name is OuterClass.InnerClass. So if you don't want to use "closures", use static inner class.