CardTester.java

import java.util.ArrayList;
public class CardTester {
 public static void main(String[] args) {
 CardCollection c1 = new CardCollection("Alan");
 CardCollection c2 = new CardCollection("Grace");
 Card turing = new Card("Alan Turing","British",1912,1954);
 Card hopper = new Card("Grace Hopper","American",1906,1992);
 Card vonneumann = new Card("John Von Neumann","Hungarian",1903,1957);
 Card shannon = new Card("Claude Shannon","American",1916,2001);
 Card johnson = new Card("Katherine Johnson","American",1918,-1);
 Card lovelace = new Card("Ada Lovelace","British",1815,1852);
 Card cerf = new Card("Vint Cerf","American",1943,-1);
 Card brin = new Card("Sergey Brin","Russian",1973,-1);
 c1.addCard(turing);
 c1.addCard(vonneumann);
 c1.addCard(shannon);
 c1.addCard(johnson);
 c1.addCard(cerf);
 c1.addCard(brin);
 c2.addCard(cerf);
 c2.addCard(lovelace);
 c2.addCard(johnson);
 c2.addCard(vonneumann);
 c2.addCard(hopper);
 System.out.println(c1);
 System.out.println(c2);
 ArrayList<Card> dupes = (ArrayList<Card>) c1.mergeCollections(c2);
 System.out.println(c1);
 System.out.println(c2);
 System.out.println("Duplicates:\n-----------");
 for (Card c : dupes) {
 System.out.println(c);
 

 }
 }
}