CountWord

package DSA_20020153_DoanThanhSon.week8;

import edu.princeton.cs.algs4.MinPQ;

import java.io.*;
import java.util.*;
import java.util.regex.Pattern;

public class CountWord {

    public void count(String input) {
        input = input.replaceAll(Pattern.quote(",") , "");
        input = input.replaceAll(Pattern.quote("."), "");
        String[] words = input.split(Pattern.quote(" "));

//        useTreeMap(words);
//        useRedBlackTree(words);
        useMinPQ(words);
    }

    public void useTreeMap(String[] words){
        Map<String, Integer> map = new TreeMap<>();

        for (String word : words) {
            if (!map.containsKey(word)) {
                map.put(word,1);
            } else {
                map.put(word, map.get(word) + 1);
            }
        }

        for (var entry : map.entrySet()) {
            System.out.println(entry.getKey() + " " + entry.getValue());
        }
    }

    public void useRedBlackTree(String[] words) {
        RedBlackTree redBlackTree = new RedBlackTree();
        for (String word : words) {
            redBlackTree.insert(word);
        }
        redBlackTree.printTree();
    }

    public void useMinPQ(String[] words) {
        MinPQ<String> minPQ = new MinPQ<>();
        for (String word: words) {
            minPQ.insert(word);
        }
        String previous = minPQ.delMin();
        int num = 1;
        String current;
        while (!minPQ.isEmpty()) {
            current = minPQ.delMin();
            if (!current.equals(previous)) {
                System.out.println(previous + " " + num);
                num = 1;
                previous = current;
            } else {
                num++;
            }
        }
        System.out.println(previous + " " + num);
    }

    public static void main(String[] args) throws IOException {
        File f = new File("D:\\Java Project\\DSA\\src\\DSA_20020153_DoanThanhSon\\week8\\word_data.txt");
        BufferedReader br = new BufferedReader(new FileReader(f));
        String input = br.readLine();
        CountWord countWord = new CountWord();
        countWord.count(input);
    }
}