String[] faces = new String[] {"2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K", "A"};
String[] suits = new String[] { "a", "b", "c", "d"};

int counter = 0;
int index = 0;

     for (int i = 0; i < faces.length; i++) {
          for (int j = 0; j < suits.length; j++) {
               String[] cards = new String[]{};
               cards[index]=faces[i]+suits[j];
               System.out.println(cards[index]);
               index++;
          }
     }