Count the occurrences of items in ArrayList

Question

I have a java.util.ArrayList and an Item object.

Now, I want to obtain the number of times the Item is stored in t

Answer 1

I know this is an old post, but since I did not see a hash map solution, I decided to add a pseudo code on hash-map for anyone that needs it in the future. Assuming arraylist and Float data types.

 Map hm = new HashMap<>();
 for(float k : Arralistentry) {
 Float j = hm.get(k);
 hm.put(k,(j==null ? 1 : j+1));
 }
 for(Map.Entry value : hm.entrySet()) {
System.out.println("\n" +value.getKey()+" occurs : "+value.getValue()+" times");
  }