Write a program to count each unique words in a given string.

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  1. public class WordCountByMapAlgoritham {

  3. public static void main(String[] args) {
  4. String s = "this is java code. this java code is highly recommended for java developer !!";
  5. String a[] = s.split(" ");
  6. Map<String, Integer> map = new HashMap<String, Integer>();

  8. for (String word : a) {
  9. if (map.get(word) != null) {
  10. map.put(word, map.get(word) + 1);
  11. } else
  12. map.put(word, 1);
  13. }
  14. System.out.println(map);
  15. }
  16. }

Output: 
{!!=1, java=3, code=1, code.=1, this=2, for=1, is=2, developer=1, highly=1, recommended=1}

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