Chapter $7$ Programming Challenge $11$ Starting out with Java Tony Gladdis $4$th Edition $-$Must Follow Templates ArrayData must be usable without instances.

ArrayData methods must scan arrays $"$up$",$ from lower indexes to

higher.

ArrayData methods must use loop counters that count down.

ArrayData methods shall assume that the arrays are of ints.

Must not have the same conceptual task coded in more than one place.

Bonus: ArrayData calculates the total, highest, and lowest by using a single

loop.

$*/$

public class Ch$07$Pc$11\_$ArrayDataTEMPLATE

$\{$

public double getTotal$($double$[]$ nums$)$

$\{$

double total $=$ nums$[0]$;

for $($int i$=1$; i $<$ nums.length; i$++)$

$\{$

total $+=$ nums$[$i$]$;

$\}$

return total;

$\}$

public double getAverage $($double$[]$ nums$)$

$\{$

double total $=$ nums$[0]$;

for $($int i$=1$; i $<$ nums.length; i$++)$

$\{$

total $+=$ nums$[$i$]$;

$\}$

return total $/$ nums.length;

$\}$

public double getHighest$($double$[]$ nums$)$

$\{$

double maxNum $=$ nums$[0]$;

for $($int i$=1$; i $<$ nums.length; i$++)$

$\{$

if $($maxNum $<$ nums$[$i$])$

$\{$

maxNum $=$ nums$[$i$]$;

$\}$

$\}$

return maxNum;

$\}$

public double getLowest$($double$[]$ nums$)$

$\{$

double minNum $=$ nums$[0]$;

for $($int i$=1$; i $<$ nums.length; i$++)$

$\{$

if $($minNum $>$ nums$[$i$])$

$\{$

minNum $=$ nums$[$i$]$;

$\}$

$\}$

return minNum;

$\}$

$\}$ Array Test Template: Input is read from the ArrayVals.txt file

$($Create the file with the values: $51549070-52)$

$--$ note that it is far easier to place this file in your program folder.

Code cannot exploit any "insider knowledge" of the contents of

ArrayVals.txt file,

other than it being a file of ints.

ArrayTest has getInput$()$ method that reads the ArrayVals.txt file and

passes values

back to main$()$ via a return statement.

ArrayTest has output$()$ method that receives the values and displays a

report of the

lowest, highest, total, count, and average of the numbers by directly

calling the appropriate class methods.

$*/$

import java.io$.*$;

public class Ch$07$Pc$11\_$ArrayTestTEMPLATE

$\{$

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

$\{$

Ch$07$Pc$11\_$ArrayDataTEMPLATE arrFunc $=$ new

Ch$07$Pc$11\_$ArrayDataTEMPLATE$()$;

double$[]$ vals $=\{5,18,6,2,0,8,0,-6,3\}$;

System.out.printf$($ "Total: $\%$f

$"$

$+"$ Ave: $\%$f

$"$

$+"$ Max: $\%$f

$"$

$+"$ Min: $\%$f

$",$

arrFunc.getTotal$($ vals $),$

arrFunc.getAverage$($ vals $),$

arrFunc.getHighest$($ vals $),$

arrFunc.getLowest$($ vals $))$;

$\}$

$\}$