Word Frequency Improved version

 PackageSearch;ImportJava.io.BufferedReader;ImportJava.io.File;ImportJava.io.FileReader;Importjava.io.IOException;Importjava.util.ArrayList;Importjava.util.Collections;ImportJava.util.Comparator;Importjava.util.List;ImportJava.util.Map;ImportJava.util.Map.Entry;ImportJava.util.Scanner;ImportJava.util.TreeMap; Public classUpdatewordsearch {/*** Input File Save separated words collection after saving statistics*/String article;//Save the contents of an articlestring[] rwords;    String[] words; int[] wordfreqs;//Save Word frequency for wordsString filename;//file name//Total Statistics    intTotal = 0; //constructor: Enter the contents of the article     PublicUpdatewordsearch ()throwsIOException {Scanner sc=NewScanner (system.in); System.out.println ("Please enter the file name:"); FileName=Sc.nextline (); File File=NewFile (filename); if(!file.exists ()) {System.out.println ("File does not exist!" "); return; } BufferedReader BF=NewBufferedReader (Newfilereader (file)); StringBuffer article=NewStringBuffer ();//Dynamic string ArrayString temp =Bf.readline ();  while(Temp! =NULL) {article.append (temp+ " ");//adding data to a dynamic string arraytemp =Bf.readline (); if(temp = =NULL)            {                 Break; }        }         This. Article =article.tostring (); }    //participle and statistic the corresponding vocabulary     Public voidSWord () {//participle, because punctuation is not involved, so all symbols are replaced by spaces        Final CharSPACE = '; Article= Article.replace (' \ ' ', SPACE). Replace (', '), SPACE). Replace ('. ', SPACE). replace (' \ '), SPACE); Article= Article.replace (' (', SPACE) '. Replace (') ', SPACE). Replace (‘-‘, SPACE); Rwords= Article.split ("\\s+");//all spaces separated by a word, the above replaced ', so I ' ve was divided into two words    }     PublicList<string>sort () {//put all occurrences of the string into a unique list, no map, because the map search efficiency is too lowlist<string> list =NewArraylist<string>();  for(String word:rwords) {list.add (word);        } collections.sort (list); returnlist; }    //Vocabulary Sorting     PublicList countwordfreq () {//Statistical Frequency Informationmap<string, integer> wordsinfo =NewTreemap<string, integer>(); String Word= "";//Word frequency name        intCount = 0;//number of Word frequency//count the total number of words        intTotal = 0; List<String> wordList =sort (); Word= Wordlist.get (0);  for(inti = 0; I <= wordlist.size (); i++)            {            if(i = =wordlist.size ())                {Wordsinfo.put (Word, count); Total++;  Break; }            if(Wordlist.get (i). Equals (Word)) {count++; }             Else{wordsinfo.put (Word, count); Total++; Word=Wordlist.get (i); Count= 1; }        }        //Word frequency information sortinglist<map.entry<string, integer>> list =NewArraylist<map.entry<string, integer>>(Wordsinfo.entryset ()); Collections.sort (list,NewComparator<map.entry<string, integer>>() {@Override Public intCompare (Entry<string, integer>O1, Entry<string, integer>O2) {                //TODO auto-generated Method Stub                returnO2.getvalue (). CompareTo (O1.getvalue ());        }        });  This. Total =Total ; returnlist; }     Public voidrun () {//Split TextSWord (); //Statistical Frequencylist<map.entry<string, integer>> list =Countwordfreq (); //Print the total number of frequenciesSYSTEM.OUT.PRINTLN ("Total word frequency:"); System.out.println ("Total:" + This. Total); System.out.println ("Frequency Statistics Information:"); //Print Statistic Frequency        intm = 0;  for(Map.entry<string, integer>mapping:list) {            if(M < 10) {System.out.println (Mapping.getkey ()+ " : "                        +Mapping.getvalue ()); M++; }            Else                 Break; }    }    //function of the test class     Public Static voidMain (string[] args)throwsIOException {updatewordsearch W=NewUpdatewordsearch ();    W.run (); }}

Word Frequency Improved version