Add Selection Based support for Java

my @chars = ("A".."Z", "a".."z"); #list of characters used for naming
my %data; #declare a hash
my $st = time; #note the starting time
for( $a = 0; $a <100; $a = $a + 1 ){ #enter name and age for 100 times
my $name; #variable to store name
my $age; #variable to store age
$name .= $chars[rand @chars] for 1..3; #generate a random 3 letter name
$age=int(rand(100)); #generate a random age between 1 to 100
$data{$name} = $age; #add the name and age to hash (duplicates will not be added)
}
my $dur = time - $st; #calculate total execution time
print "Execution time: $dur s\n"; #display the total execution time
Code without hash
my @chars = ("A".."Z", "a".."z"); #list of characters used for naming
my @data; #declare an array
my $st = time; #note the starting time
for( $a = 0; $a <100; $a = $a + 1 ){ #enter name and age for 100 times
my $name; #variable to store name
my $age; #variable to store age
$name .= $chars[rand @chars] for 1..3; #generate a random 3 letter name
$age=int(rand(100)); #generate a random age between 1 to 100
$duplicate=0; #flag to check duplicate name
for($i=0;$i<$a;$i++){
if($data[$i][0]==$name){ #check if generated name exits in array or not
$duplicate=1; #duplicate name is found
break;
}
}
if($duplicate==0){ #if duplicate name is not found
$data[$a][0] = $name; #add the name to array
$data[$a][1] = $age; #add the age to array
}else{ #if duplicate name is found
$a=$a-1;
}
}