Java词频统计

import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
import java.util.Random;

public class Demo01 {
    static String[] arr = {"面向对象", "封装", "继承", "多态"
            , "数组", "父类", "抽象类", "接口", "异常", "运行时异常"
            , "编译时异常", "抽象方法", "成员方法", "构造方法","静态方法"
            ,"成员变量", "局部变量", "静态变量", "常量", "重写", "重载"
            , "向上转型", "向下转型"};
    static Random random = new Random();
    static String name = "D:\io\io2\words";

    public static void main(String[] args) {
        try {
            Writer out = new FileWriter(name);
            for (int i = 1; i < 10000; i++) {
                int index = random.nextInt(arr.length);
                if(i % 10 == 0){
                    out.write(arr[index] + "n");
                }else {
                    out.write(arr[index] + " ");
                }
            }
            out.flush();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

import java.io.*;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;

public class Demo02 {
    public static void main(String[] args) {
        HashMap map = new HashMap<>();
        TreeMap treeMap = new TreeMap<>();
        String name = "D:\io\io2\words";
        try {
            Reader reader = new FileReader(name);
            BufferedReader read = new BufferedReader(reader);
            String line = null;
            while((line = read.readLine()) != null){
                String[] arr = line.split(" ");
                for (String word : arr) {
                    if(map.get(word) == null){
                        map.put(word,1);
                    }else {
                        map.put(word,map.get(word)+1);
                    }
                }
            }
            System.out.println("词频统计结果:");
            Set> set = map.entrySet();
            for (Map.Entry entry :set) {
                String key = entry.getKey();
                Integer value = entry.getValue();
                treeMap.put(value,key);
            }
            System.out.println("个数:单词");
            treeMap.forEach((k,v) -> {
                System.out.println(k + ":" + v);
            });
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}