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

You always set the value to 1 and then update it by another one. What you need is to update the map value (and not setting it to 1 again).

Instead of:

map.put(key, 1);

use:

Integer value = map.get(key);
if (value == null){
    value = 0
}
value++;
map.put(key, value);

And drop the second if.