Java

import java.util.*; public class ListOfStrings { private ArrayList list;

public ListOfStrings() { list=new ArrayList(); } public void add(String s){ list.add(s); }

public String toString() { String s="["; for(int i=0;i

Design a function count-all-words which takes a ListOfString and produces a ListOfFrequency. The ListOfFrequency produced contains the appropriate frequencies counted from the entire list of strings. Here's how it might work:

 public static void main(String[] args) { ListOfStrings los = new ListOfStrings(); los.add("mango"); los.add("apple"); los.add("banana"); los.add("mango"); los.add("apple"); los.add("apple"); ListOfFrequency alof = Utilities.countAllWords(los); System.out.println( alof ); } 

The above, when compiled and run, should produce:

> run Utilities [(mango, 2), (apple, 3), (banana, 1)] >