/** * @author lautturi.com * Java example:Counts the number of occurrences of an element in the list */ import java.util.*; public class Lautturi { public static void main(String[] args) { List<String> list = Arrays.asList("hello","lautturi","java","python","java","lautturi","world"); Set<String> distinct = new HashSet<>(list); for (String s: distinct) { System.out.println(s + ": " + Collections.frequency(list, s)); } } }
output
python: 1 java: 2 world: 1 lautturi: 2 hello: 1