"...Input is a positive Integer or not"

Try this:

#!/usr/bin/env perl

use strict;
use warnings;
use Inline Java => q(./Karl.java);
use feature qw(say);

say Karl->isaInt($_) for ( -10, 0, 10 );

__END__

karls-mac-mini:inline karl$ ./run.pl
-1
0
1
[download]

Karl.java:

import java.lang.Integer;

class Karl {
    private Karl(){
    }
    public static int isaInt( int n){
        return Integer.signum(n);
    }
}
[download]

It seems like it works ;-)

I guess that they burn me for this.

Please see also Inline.

Regards, Karl

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