用JAVA语言设计一个类,统计一篇英文文章的词频,并按照词频由高到低输出。修改下面代码就行了。

这题目如果能增加一个类的话会高效很多。。。如果非要在这个框框里面，代码麻烦 效率低下呢。

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import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.Iterator;

import java.util.List;

import java.util.Set;

import java.util.TreeSet;

public class Article {

//保存文章的内容

String content;

//保存分割后的单词集合

String[] rawWords;

//保存统计后的单词集合

String[] words;

//保存单词对应的词频

int[] wordFreqs;

//构造函数，输入文章内容

//提高部分：从文件中读取

public Article() {

content = "kolya is one of the richest films i've seen in some time . zdenek sverak plays a confirmed old bachelor ( who's likely to remain so ) , who finds his life as a czech cellist increasingly impacted by the five-year old boy that he's taking care of . though it ends rather abruptly-- and i'm whining , 'cause i wanted to spend more time with these characters-- the acting , writing , and production values are as high as , if not higher than , comparable american dramas . this father-and-son delight-- sverak also wrote the script , while his son , jan , directed-- won a golden globe for best foreign language film and , a couple days after i saw it , walked away an oscar . in czech and russian , with english subtitles . ";

}

//对文章根据分隔符进行分词,将结果保存到rawWords数组中

public void splitWord(){

//分词的时候，因为标点符号不参与，所以所有的符号全部替换为空格

final char SPACE = ' ';

content = content.replace('\'', SPACE).replace(',', SPACE).replace('.', SPACE);

content = content.replace('(', SPACE).replace(')', SPACE).replace('-', SPACE);

rawWords = content.split("\\s+");//凡是空格隔开的都算单词，上面替换了', 所以I've 被分成2个 //单词

}

//统计词，遍历数组

public void countWordFreq() {

//将所有出现的字符串放入唯一的set中，不用map,是因为map寻找效率太低了

SetString set = new TreeSetString();

for(String word: rawWords){

set.add(word);

}

Iterator ite = set.iterator();

ListString wordsList = new ArrayListString();

ListInteger freqList = new ArrayListInteger();

//多少个字符串未知，所以用list来保存先

while(ite.hasNext()){

String word = (String) ite.next();

int count = 0;//统计相同字符串的个数

for(String str: rawWords){

if(str.equals(word)){

count++;

}

}

wordsList.add(word);

freqList.add(count++);

}

//存入数组当中

words = wordsList.toArray(new String[0]);

wordFreqs = new int[freqList.size()];

for(int i = 0; i freqList.size(); i++){

wordFreqs[i] = freqList.get(i);

}

}

//根据词频，将词数组和词频数组进行降序排序

public void sort() {

class Word{

private String word;

private int freq;

public Word(String word, int freq){

this.word = word;

this.freq = freq;

}

}

//注意：此处排序，1）首先按照词频降序排列， 2）如果词频相同，按照字母降序排列，

//如 'abc' 'ab' 'aa'

class WordComparator implements Comparator{

public int compare(Object o1, Object o2) {

Word word1 = (Word) o1;

Word word2 = (Word) o2;

if(word1.freq word2.freq){

return 1;

}else if(word1.freq word2.freq){

return -1;

}else{

int len1 = word1.word.trim().length();

int len2 = word2.word.trim().length();

String min = len1 len2? word2.word: word1.word;

String max = len1 len2? word1.word: word2.word;

for(int i = 0; i min.length(); i++){

if(min.charAt(i) max.charAt(i)){

return 1;

}

}

return 1;

}

}

}

List wordList = new ArrayListWord();

for(int i = 0; i words.length; i++){

wordList.add(new Word(words[i], wordFreqs[i]));

}

Collections.sort(wordList, new WordComparator());

for(int i = 0; i wordList.size(); i++){

Word wor = (Word) wordList.get(i);

words[i] = wor.word;

wordFreqs[i] = wor.freq;

}

}

//将排序结果输出

public void printResult() {

System.out.println("Total " + words.length + " different words in the content!");

for(int i = 0; i words.length; i++){

System.out.println(wordFreqs[i] + " " + words[i]);

}

}

//测试类的功能

public static void main(String[] args) {

Article a = new Article();

a.splitWord();

a.countWordFreq();

a.sort();

a.printResult();

}

}

-----------------------

Total 99 different words in the content!

5 and

4 the

4 i

4 a

3 as

2 with

2 who

2 to

2 time

2 sverak

2 son

2 s

2 old

2 of

2 it

2 in

2 his

2 czech

1 zdenek

1 year

1 wrote

1 writing

1 won

1 whining

1 while

1 wanted

1 walked

1 ve

1 values

1 though

1 this

1 these

1 that

1 than

1 taking

1 subtitles

1 spend

1 some

1 so

1 seen

1 script

1 saw

1 russian

1 richest

1 remain

1 rather

1 production

1 plays

1 oscar

1 one

1 not

1 more

1 m

1 likely

1 life

1 language

1 kolya

1 jan

1 is

1 increasingly

1 impacted

1 if

1 higher

1 high

1 he

1 golden

1 globe

1 foreign

1 for

1 five

1 finds

1 films

1 film

1 father

1 english

1 ends

1 dramas

1 directed

1 delight

1 days

1 couple

1 confirmed

1 comparable

1 characters

1 cellist

1 cause

1 care

1 by

1 boy

1 best

1 bachelor

1 away

1 are

1 an

1 american

1 also

1 after

1 acting

1 abruptly

java 程序编程出现警告

1.告警是你使用Map时没有指定具体类型,你可以为其指定相应的类型MapString,Integermap = new HashMapString,Integer();

2.第一句是获取Map的Entry集合,你可以查看JDK帮助文档看看Entry的数据结构.

第二句是获取Set的迭代器,后面的代码是通过迭代器,迭代出每个Entry对象.

3.自己写个冒泡算法,把Map中的记录排序下.

java计算一篇英文文档词频 并按出现次数从高到低输出（以下基础上补充）谢谢！

String result = sb.toString();

String[] Str = result.split("[^A-Za-z0-9]"); //quanbu

for(String string:Str){

singleSet.add(string);

if("".equals(string)){ //这里是我加的，去除空格次数的处理

singleSet.remove("");

}

}

MapString, Integer map=new HashMapString, Integer();

for (String childString : singleSet){

int count=0;

for(String fatherString : Str){

if(fatherString.equals(childString)){

count++;

}

}

map.put(childString, count); //存储在hashmap中

}

ArrayListEntryString,Integer l = new ArrayListEntryString,Integer(map.entrySet());

Collections.sort(l, new ComparatorObject(){

public int compare(Object e1, Object e2){

int v1 = Integer.parseInt(((EntryString,Integer)e1).getValue().toString());

int v2 = Integer.parseInt(((Entry)e2).getValue().toString());

return v2-v1; //改为v1-v2就是从小到大了

}

});

for (EntryString, Integer e: l){

System.out.println(e.getKey()+" "+e.getValue());

}

代码仅供参考！希望对你有用

java程序：统计单词词频，

不多说，先看代码：

import java.util.*;

import java.io.*;

public class wordsRate {

public static void main(String[] args) throws Exception {

BufferedReader infile = new BufferedReader(new FileReader("article.txt"));

String string;

String file = null;

while ((string = infile.readLine()) != null) {

file += string;

}

file = file.toLowerCase();

file = file.replaceAll("[^A-Za-z]", " ");

file = file.replaceAll("\\s+", " ");

String words[];

words = file.split("\\s+");

MapString, Integer hashMap = new HashMapString, Integer();

for (int i = 0; i words.length; i++) {

String key = words[i];

if (hashMap.get(key) != null) {

int value = ((Integer) hashMap.get(key)).intValue();

value++;

hashMap.put(key, new Integer(value));

} else {

hashMap.put(key, new Integer(1));

}

}

MapString, Object treeMap = new TreeMapString, Object(hashMap);

MapString, Object treeMap1 = new TreeMapString, Object(hashMap);

BufferedWriter bw = new BufferedWriter(new FileWriter("result.txt"));

//下面是我改动的你的代码：

Iterator iter = treeMap.entrySet().iterator();

//定义两个新的数组ss1和ss2，数组长度就是hashMap的长度，里面放分别是hashMap的value和key

String ss1[]=new String[treeMap.size()];;

int ss2[]=new int[treeMap.size()];

int i=0;

while (iter.hasNext()) {

Map.Entry entry = (Map.Entry) iter.next();

int val = (Integer)entry.getValue();

String key =(String) entry.getKey();

ss1[i]=key;

ss2[i]=val;

i++;

}

//下面将ss1数组进行排序,并将其与ss2数组的内容相对应起来

int sValue=0;

String sKey="";

for(int j=0;jss2.length;j++){

for(int k=0;ki;k++){

if(ss2[j]ss2[k]){

sValue=ss2[j];

sKey=ss1[j];

ss2[j]=ss2[k];

ss1[j]=ss1[k];

ss2[k]=sValue;

ss1[k]=sKey;

}

}

}

for(int j=0;jss2.length;j++){

System.out.println(ss1[j]+"="+ss2[j]);

bw.write(ss1[j]+"="+ss2[j]);

bw.newLine();

bw.flush();

}

}

}

代码是本人自己写的，也经过了自己的验证，肯定没问题，希望采纳。

功能实现了，我是将其key和value值放在了数组之中，然后进行排序，将其输出到了txt文件里

排序方式不一样，实现的方式也不一样，所谓仁者见仁智者见智。

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