Java读本地英文txt文本，显示行数、字数、单词出现频率

参考网上的代码，自己再略微修改，纯作记录

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;

public class readFile
{
    public static void main(String[] args)
    {
        int lineNum = 0;//定义变量 行数

        HashMap<String,Integer> map = new HashMap<String ,Integer>();//定义map，用于保存文本中的单词和出现次数
        BufferedReader in = null;
        try
        {
            in = new BufferedReader(new FileReader("F:\\EC.txt"));//文本地址
            String buffer = null;
            //
            while((buffer = in.readLine()) != null)
            {

                lineNum++;                String[] words = buffer.replaceAll("[^a-zA-Z]+", " ").trim().split(" ");//正则表达式分割
                   for(int i = 0; i < words.length; i++)
                {
                    map.put(words[i],map.getOrDefault(words[i], 0)+1);//value默认为0，每重复1次加1
                }
            }
            //本段为输出map中保存的数据
            Set<Map.Entry<String,Integer>> set = map.entrySet();
            for(Iterator<Map.Entry<String,Integer>> it = set.iterator();it.hasNext();)
            {
                Map.Entry<String,Integer> entr = (Map.Entry<String,Integer>)it.next();
                System.out.println(entr.getKey()+"--------"+entr.getValue());
            }
            System.out.println("行数"+lineNum);
            System.out.println("字数"+map.size());

        }
        catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        finally
        {
            try
            {
                in.close();//关闭缓冲字符流
            }
            catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

}