HW6.24

 public class Solution
 {
     public static void main(String[] args)
     {
         int count = 0;
         int color;
         int number;
         String colorStr;
         String numberStr;
         String[] colorSet = {" ", " ", " ", " "};
         while(true)
         {
             color = (int)(Math.random() * 4);
             number = (int)(Math.random() * 13);

             colorStr = getColor(color);
             numberStr = getNumber(number);

             System.out.println(numberStr + " of " + colorStr);

             count++;

             if(!contains(colorSet, colorStr))
                 add(colorSet, colorStr);

             if(isFull(colorSet))
                 break;
         }

         System.out.println("Number of picks: " + count);
     }

     public static boolean isFull(String[] array)
     {
         for(String str: array)
             if(str == " ")
                 return false;
         return true;
     }

     public static boolean contains(String[] array, String str)
     {
         for(String i: array)
             if(i == str)
                 return true;
         return false;
     }

     public static void add(String[] array, String str)
     {
         for(int i = 0; i < array.length; i++)
             if(array[i] == " ")
                 array[i] = str;
     }

     public static String getColor(int n)
     {
         if(n == 0)
             return "Spades";
         else if(n == 1)
             return "Clubs";
         else if(n == 2)
             return "Hearts";
         else
             return "Diamonds";
     }

     public static String getNumber(int n)
     {
         if(n == 0)
             return "King";
         else if(n == 1)
             return "Ace";
         else if(n == 11)
             return "Jack";
         else if(n == 12)
             return "Queen";
         else
             return "" + n;
     }
 }