单词统计

 

package test;

import java.io.BufferedReader;

import java.io.FileReader;

import java.io.IOException;

import java.text.NumberFormat;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;

import java.util.Map;

import java.util.TreeMap;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

 

public class zimu {

     

     private static String formattedDecimalToPercentage(double decimal)

        {

            //获取格式化对象

            NumberFormat nt = NumberFormat.getPercentInstance();

            //设置百分数精确度2即保留两位小数

            nt.setMinimumFractionDigits(2);

            return nt.format(decimal);

        }

public static void main(String []args) {

    String a1;

    char a='A';

    int a2[]=new int[27];

    char b1[]=new char[26];

    char b2[]=new char[26];

    double c1[]=new double[26];

    for(int i=0;i<26;i++)

    {

    b1[i]=a;

    b2[i]=(char)(a+32);

    a++;

    }

    try {

        BufferedReader in = new BufferedReader(new FileReader("D:\piao.txt"));

        String str;

        while ((str = in.readLine()) != null) {

            char[] d=str.toCharArray();

            for(int i=0;i<d.length-1;i++) {

                for(int j=0;j<26;j++) {

                    if(b1[j]==d[i]||b2[j]==d[i]) {

                        a2[j]++;

                    }

                }

            }

        }

         

        a2[26]=0;

        for(int i=0;i<26;i++) {

            a2[26]=a2[i]+a2[26];

        }

 

        for(int i=0;i<26;i++) {

             c1[i]=(double)((double)a2[i]/(double)a2[26]);

        }

         

         

       for(int i=0;i<26;i++) {

            System.out.print(b1[i]);

            System.out.print("和");

            System.out.print(b2[i]);

            System.out.print("出现的次数为：");

            System.out.print(a2[i]);

            double d=(double)((double)a2[i]/(double)a2[26]);

            String result2=formattedDecimalToPercentage(d);

            System.out.println("   百分比为："+result2);

 

        }

       System.out.println("       ");

        System.out.println("出现单词次数较多的前十个为：");

        BufferedReader reader = new BufferedReader(new FileReader(

                "D:\\piao.txt"));

        StringBuffer buffer = new StringBuffer();

        String line = null;

        while ((line = reader.readLine()) != null) {

            buffer.append(line);

        }

        reader.close();

        Pattern expression = Pattern.compile("[a-zA-Z]+");

        String string = buffer.toString();

        Matcher matcher = expression.matcher(string);//

        Map<String, Integer> map = new TreeMap<String, Integer>();

        String word = "";

        int times = 0;

        while (matcher.find()) {

            word = matcher.group();

            if (map.containsKey(word)) {

                times = map.get(word);

                map.put(word, times + 1);

            } else {

                map.put(word, 1);

            }

        }

  

        List<Map.Entry<String, Integer>> list = new ArrayList<Map.Entry<String, Integer>>(

                map.entrySet());

 

        Comparator<Map.Entry<String, Integer>> comparator = new Comparator<Map.Entry<String, Integer>>() {

            public int compare(Map.Entry<String, Integer> left,

                    Map.Entry<String, Integer> right) {

                return (left.getValue()).compareTo(right.getValue());

            }

        };

        Collections.sort(list, comparator);// 排序

        int last = list.size() - 1;

        int asdad=0;

        for(int i=last;i>0;i--) {

            String key = list.get(i).getKey();

            Integer value = list.get(i).getValue();

            asdad=asdad+value;

             

        }

         

        for (int i = last; i > last - 10; i--) {

            String key = list.get(i).getKey();

            Integer value = list.get(i).getValue();

            System.out.print(key + " :" + value);

           double d=(double)((double)value/(double)asdad);

           String result2=formattedDecimalToPercentage(d);

        System.out.println("   百分比为："+result2);

        }

         

    } catch (IOException e) {

    }

}

}