Question

using java

find the third most frequent word in a paragraph in an array list. also print the sentences that include this word.

the paragraph is stored in an array list. you have to search within the array list the third most used word.

Answer 1

//ProgramArrayList.java

import java.util.*;
import static java.util.stream.Collectors.toMap;

public class ProgramArrayList {

    /**
     * function to find third most frequent letter
     * @param para
     * @return
     */
    public static String thirdMostFrequentValue(ArrayList<String> para) {
        // map for storing the word and count
        HashMap<String, Integer> hashMap = new HashMap<>();
        for (String s : para) {
            // splitting para by space
            String temp[] = s.trim().split(" ");
            // adding to hashmap
            for (String word : temp) {
                if (hashMap.containsKey(word)) {
                    hashMap.put(word, hashMap.get(word) + 1);
                } else {
                    hashMap.put(word, 1);
                }
            }
        }
        // sorting the haspmap by descending order
        HashMap<String, Integer> sortedHashMap = hashMap
                .entrySet()
                .stream()
                .sorted(Collections.reverseOrder(Map.Entry.comparingByValue()))
                .collect(
                        toMap(e -> e.getKey(), e -> e.getValue(), (e1, e2) -> e2,
                                LinkedHashMap::new));
        Object keyValues[] = sortedHashMap.keySet().toArray();
        if (keyValues.length >= 3) {
            return (String) keyValues[2];
        }
        return null;
    }

    /**
     * function to print line with third most frequent letter
     * @param para
     */
    public static void printSentenceWithWord(ArrayList<String> para){
        // calling above function for finding the third most frequent letter
        String thirdFrequentWord = thirdMostFrequentValue(para);
        if(thirdFrequentWord == null){
            System.out.println("Third Frequent Word Not Found");
            return;
        }
        System.out.println("Third Frequent Word: "+thirdFrequentWord+"\n");
        System.out.println("Printing sentence that contains Third Most Frequent Letter.\n");
        // looping through paragraphs
        for (String s: para){
            String temp[] = s.split("\n");
            for(String sentence: temp){
                if(sentence.contains(thirdFrequentWord))
                    System.out.println(sentence);
            }
        }
    }
    public static void main(String[] args) {
        ArrayList<String> paragraphs = new ArrayList<>();
        paragraphs.add("This is First para");
        paragraphs.add("This is Second para");
        paragraphs.add("Not a good para");
        paragraphs.add("Test code");
        printSentenceWithWord(paragraphs);
    }
}

//OUT

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