Counting occurrences of a key in a Map in Java

Question

I\'m writing a project that captures Java keywords from a .java file and keeps track of the occurrences with a map. I\'ve used a similar method in the past successfully, but

Answer 1

Map map = new HashMap();
Set keywordSet = new HashSet(Arrays.asList(keywords));
Scanner input = new Scanner(file);

while (input.hasNext()){
     String key = input.next();
     if (key.length() > 0)
        if (keywordSet.contains(key)){
           Integer counter = map.get(key);

           if (counter == null)
               map.put(key, 1);
           else
               map.put(key, count + 1);
         }
}