Chang from arrays to variables$/*$ Here's another Switch example, this one

from the book, but it's also a good example

of the random number generator.

Fig. $6\mathrm{.}7$: RollDie.java

Roll a six$-$sided die a bunch of times. $*/$

import java.security.SecureRandom;

public class Part$178$Random

$\{$

public static void main$($String$[]$ args$)$

$\{$

$//$ randomNumbers object will produce secure random numbers

SecureRandom randomNumbers $=$ new SecureRandom$()$;

int frequency$1=0$; $//$ count of $1$s rolled

int frequency$2=0$; $//$ count of $2$s rolled

int frequency$3=0$; $//$ count of $3$s rolled

int frequency$4=0$; $//$ count of $4$s rolled

int frequency$5=0$; $//$ count of $5$s rolled

int frequency$6=0$; $//$ count of $6$s rolled

$//$ tally counts for $6,000,000$ rolls of a die

for $($int roll $=1$; roll $<=6000000$; roll$++)$

$\{$

int face $=1+$ randomNumbers.nextInt$(6)$; $//$ number from $1$ to $6$

$//$ use face value $1-6$ to determine which counter to increment

switch $($face$)$

$\{$

case $1$:

$++$frequency$1$; $//$ increment the $1$s counter

break;

case $2$:

$++$frequency$2$; $//$ increment the $2$s counter

break;

case $3$:

$++$frequency$3$; $//$ increment the $3$s counter

break;

case $4$:

$++$frequency$4$; $//$ increment the $4$s counter

break;

case $5$:

$++$frequency$5$; $//$ increment the $5$s counter

break;

case $6$:

$++$frequency$6$; $//$ increment the $6$s counter

break;

$\}$

$\}$

System.out.println$("$Face$\backslash$tFrequency$")$; $//$ output headers

System.out.printf$("1\backslash$t$\%$d$\%$n$2\backslash$t$\%$d$\%$n$3\backslash$t$\%$d$\%$n$4\backslash$t$\%$d$\%$n$5\backslash$t$\%$d$\%$n$6\backslash$t$\%$d$\%$n$",$

frequency$1,$ frequency$2,$ frequency$3,$ frequency$4,$

frequency$5,$ frequency$6)$;

$\}$

$\}$