How to count the number of occurrences of an element in a List

Question

I have an ArrayList, a Collection class of Java, as follows:

ArrayList animals = new ArrayList();
animals.add(\"bat\         


        

Answer 1

List lst = new ArrayList();

lst.add("Ram");
lst.add("Ram");
lst.add("Shiv");
lst.add("Boss");

Map mp = new HashMap();

for (String string : lst) {

    if(mp.keySet().contains(string))
    {
        mp.put(string, mp.get(string)+1);

    }else
    {
        mp.put(string, 1);
    }
}

System.out.println("=mp="+mp);

Output:

=mp= {Ram=2, Boss=1, Shiv=1}