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Java Java Data Structures - Retired Exploring the Java Collection Framework Maps

Pascal Petruch
Pascal Petruch
1,479 Points
Posted by Pascal Petruch
Pascal Petruch
1,479 Points

Map of category-to-count always returns one count too much

Hello everyone,

I dont' understand why, but I always get one count to much. If it should be 2 I get 3. There's an error in my code. Could you give me a hint?

public Map<String,Integer> getCategoryCounts() {
    Map<String,Integer> result = new HashMap<String,Integer>();
    Integer count = 0;
    for(BlogPost post : mPosts) {
      if(result.containsKey(post.getCategory()) == false) {
        count=1;
        result.put(post.getCategory(),count);
      }
      else {
        count++;
        result.put(post.getCategory(),count);
      }
    }
    return result;
  }

1 Answer

Steve Hunter
Steve Hunter
57,712 Points
Steve Hunter
Steve Hunter
57,712 Points

Hi Pascal,

A week ago, I answered within this post - let me know if that sorts your issue out for you. I think that post should help you.

Steve.