נתונות המחלקות First, Second (יורשת מ-First), Third, ומחלקת Driver עם הפעולה main שלפניך.

public class First {
    public static int count = 0;
    private String str;
    public First (String str) {
        count ++;
        this.str = str;
    }
    public First (First g) {
        count ++;
        this.str = "Copy" + g.str;
    }
    public void setStr (String str) {
        this.str = str;
    }
    public void print () {
        System.out.println ("First" + this.str);
    }
}

public class Second extends First {
    private First f;
    public Second (First fx, First fy) {
        super (fx);
        this.f = fy;
    }
    public void setStr (String str) {
        super.setStr (str);
        this.f = new First (str);
    }
    public void print () {
        System.out.println ("Second");
        super.print ();
        this.f.print ();
    }
}

public class Third {
    private int curr;
    private First[] arr;
    public Third (int count) {
        curr = 0;
        arr = new First [count];
    }
    public void print () {
        for ( int i = 0 ; i < curr ; i++ )
            arr [i].print ();
    }
    public void add (First s) {
        if ( curr < arr.length ) {
            arr [curr] = s;
            curr ++;
        }
    }
}

public class Driver {
    public static void main (String[] args) {
        First f1 = new First ("One") ;
        First f2 = new First ("Two") ;
        First f3 = new First (f2) ;
        Second s1 = new Second (f1, f3) ;
        Third t = new Third (First.count) ;
        t.add (f1) ;
        t.add (f2) ;
        t.add (s1) ;
        System.out.println (First.count) ;
        t.print () ;
        System.out.println (" ----------") ;
        f1.setStr ("Five") ;
        System.out.println (First.count) ;
        t.print () ;
    }
}