public class RollDie
1: // Fig. 7.7: RollDie.java
2: // Roll a six-sided die 6000 times.
3: import java.util.Random;
4:
5: public class RollDie
6: {
7: public static void main( String args[] )
8: {
9: Random randomNumbers = new Random(); // random number generator
10: int frequency[] = new int[ 7 ]; // array of frequency counters
11:
12: // roll die 6000 times; use die value as frequency index
13: for ( int roll = 1; roll <= 6000; roll++ )
14: ++frequency[ 1 + randomNumbers.nextInt( 6 ) ];
15:
16: System.out.printf( "%s%10s\n", "Face", "Frequency" );
17:
18: // output each array element's value
19: for ( int face = 1; face < frequency.length; face++ )
20: System.out.printf( "%4d%10d\n", face, frequency[ face ] );
21: } // end main
22: } // end class RollDie
23:
24:
25:
26: /**************************************************************************
27: * (C) Copyright 1992-2005 by Deitel & Associates, Inc. and *
28: * Pearson Education, Inc. All Rights Reserved. *
29: * *
30: * DISCLAIMER: The authors and publisher of this book have used their *
31: * best efforts in preparing the book. These efforts include the *
32: * development, research, and testing of the theories and programs *
33: * to determine their effectiveness. The authors and publisher make *
34: * no warranty of any kind, expressed or implied, with regard to these *
35: * programs or to the documentation contained in these books. The authors *
36: * and publisher shall not be liable in any event for incidental or *
37: * consequential damages in connection with, or arising out of, the *
38: * furnishing, performance, or use of these programs. *
39: *************************************************************************/