interface Hidden {
    public int value();
}

class Outer {
    private class HiddenInner implements Hidden {
        private int i;
        public HiddenInner (int i) {
            this.i = i;
        }        
        public int value () {
            return i;
        }
    }

    public Hidden getInnerInstance () {
        HiddenInner in = new HiddenInner(11);
        return in;
    } 
}

public class Test {
    public static void main(String[] args) {
        Outer out             = new Outer();

	Outer.HiddenInner in1 = out.getInnerInstance();          // va genera eroare, tipul Outer.HiddenInner nu este vizibil
	Outer.HiddenInner in2 = new Outer().new HiddenInner(10); // din nou eroare
		
        Hidden in3            = out.getInnerInstance();          // acces corect la o instanta HiddenInner
	System.out.println(in3.value());
    }
}