//
// example of inner class (showing access to enclosing object).
//

import java.util.Vector ;

class MyClass1 {

        String theName ;
        Vector things ;

        MyClass1(String theName) {
                this.theName = theName ;
                things = new Vector() ;
        }

        void addThing(int n) {
                things.addElement(new MySubClass(n)) ;
        }

        public String toString() {
                return "name = " + theName + "; things = " + things ;
        }

        // inner class for "subobjects" of MyClass1 objects

        class MySubClass {

                // within this class, have access to instance variables
                //      of MyClass1 (theName)

                int n ;

                MySubClass(int n) {
                        this.n = n ;
                }

                public String toString() {
                        return n + " (in " + theName + ")" ;
                                // theName references instance variable
                                //      in enclosing object
                }
        }
}

public class Nest1 {

        public static void main(String[] args) {

                MyClass1 o1 = new MyClass1("nums") ;
                MyClass1 o2 = new MyClass1("evens") ;
                for (int i = 0 ; i < 4 ; i++) {
                        o1.addThing(i) ;
                        o2.addThing(2*i) ;
                }
                System.out.println(o1) ;
                System.out.println(o2) ;
        }
}