Java program to count duplicates in a list

    package example;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

public class FruitsExample {


public static void main(String[] args) {

List<String> list = new ArrayList<String>();
        list.addAll(Arrays.asList("banana","apple","apple","mango","banana","orange"));
        Map<String, Integer> map = new HashMap<String, Integer>();
         
        Set<String> set = new HashSet<String>();
        set.addAll(list);
     
        for(String str:set)
        {
        int occ = Collections.frequency(list, str);
       
        map.put(str,occ);
        }
         
        System.out.println(map);
        map.forEach((k,n) -> System.out.println(k+"->"+n));
}
}

OUTPUT:  {banana=2, orange=1, apple=2, mango=1}
banana->2
orange->1
apple->2
mango->1