Liczenie słów w tekście

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.HashMap;
import java.util.Map.Entry;

public class LiczenieSlow {
	public static void main(String[] args) {
		try {
			BufferedReader br = new BufferedReader(new FileReader("plik2"));
			String linia;
			HashMap<String, Integer> ilosc = new HashMap<String, Integer>();
			while ((linia = br.readLine()) != null) {
				for (int i = 0; i < linia.length(); i++) {
					if (!ilosc.containsKey(linia.substring(i, ??))) {
						ilosc.put(linia.substring(i, ??), 1);
					}else {
						ilosc.put(linia.substring(i, ??),+1);
					}
				}
			}
			for (Entry<String, Integer> entry:ilosc.entrySet()) {
				System.out.println(entry.getKey() + "	x 	" + entry.getValue());
			}
			br.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}

            while ((linia = br.readLine()) != null) {
                Scanner sc = new Scaner(linia);
                while(sc.hasNext()){
                    String word = sc.next();              
                    if (!ilosc.containsKey(word)) {
                        ilosc.put(word, 1);
                    }else {
                        ilosc.put(word,ilosc.get(word)+1);
                    }
                }
            }

   Map<String, Integer> m = new HashMap<>();


    for (String a : source) {
        Integer freq = m.get(a);
        m.put(a, (freq == null) ? 1 : freq + 1);
    }

    System.out.println(m.size() + " distinct words:");
    System.out.println(m);
   

"java Freq if it is to be it is up to me to delegate".split(" ")

przefiltrowanyPanMateusz = panMateusz.replaceAll("[^A-Za-z0-9 ]", "").toLowerCase();

        Map<String, Long> wordcount = Files.lines(Paths.get("plik"))
                .flatMap(line -> Stream.of(line.split(" ")))
                .map(String::toLowerCase)
                .collect(Collectors.groupingBy(
                        word -> word,
                        Collectors.counting()
                ));
        System.out.println(wordcount);