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import java.util.*; public class CollectionsFrequencyExample2 { public static void main(String[] args) { //Create a list object List
list = new ArrayList<>(); list.add(1); list.add(2); list.add(1); list.add(3); list.add(2); list.add(3); list.add(4); System.out.println("List of elements: "+list); System.out.println("\nCount all with frequency:"); Set
uniqueSet = new HashSet
(list); for (Integer i : uniqueSet) { System.out.println(i + ": " + Collections.frequency(list, i)); } } }
Output