How to count duplicate elements in ArrayList?

Question

I need to separate and count how many values in arraylist are the same and print them according to the number of occurrences.

I\'ve got an arraylist called digits :<

Answer 1

Java 8 can handle this problem with 3 lines of code.

    Map  duplicatedCount = new LinkedHashMap<>();
    list.forEach(a -> duplicatedCount.put(a, duplicatedCount.getOrDefault(a, 0) +1));
    duplicatedCount.forEach((k,v) -> System.out.println(v+" times "+k));