public class CountPositive

$\{$

$/**$

$*$ Counts positive elements in array

$*$

$*$ @param x array to search

$*$ @return number of positive elements in x

$*$ @throws NullPointerException if x is null

$*/$

public static int countPositive $($int$[]$ x$)$

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int count $=0$;

for $($int i$=0$; i $<$ x$.$length; i$++)$

$\{$

if $($x$[$i$]>=0)$

$\{$

count$++$;

$\}$

$\}$

return count;

$\}$

$//$ test: x$=[-4,2,0,2]$

$//$ Expected $=2$

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

$\{//$ Driver method for countPositive

$//$ Read an array from standard input, call countPositive$()$

int $[]$inArr $=$ new int $[$argv$.$length$]$;

if $($argv$.$length $==0)$

$\{$

System.out.println $("$Usage: java CountPositive v$1[$v$2][$v$3]...")$;

return;

$\}$

for $($int i $=0$; i$<$ argv.length; i$++)$

$\{$

try

$\{$

inArr $[$i$]=$ Integer.parseInt $($argv$[$i$])$;

$\}$

catch $($NumberFormatException e$)$

$\{$

System.out.println $("$Entry must be a integer, using $1.")$;

inArr $[$i$]=1$;

$\}$

$\}$

System.out.println $("$Number of positive numbers is: $"+$ countPositive $($inArr$))$;

$\}$

$\}$

a$)$ Count the positive numbers.

Test the following set of values

test: x $=[-4,2,0,2]$

Expected result is $=2$