代码可以高亮：

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;

public class Main {

    public static void main(String[] args) throws IOException, InterruptedException {
        String file = "word.txt";
        Map<String, Integer> wordCountMap = new HashMap<>();

        Files.lines(Paths.get(file))
                .forEach(line -> {
                    String[] words = line.split(" ");
                    for (String word : words) {
                        wordCountMap.merge(word.trim(), 1, Integer::sum);
                    }
                });
        wordCountMap.entrySet()
                .stream()
                .sorted(Map.Entry.comparingByValue())
                .skip(wordCountMap.size() - 10)
                .forEach(System.out::println);
    }
}