Statistical word Frequency

Today, the teacher arranged a task: count the frequency of the most occurrences of several words in a file.

How to say, or not, only the Internet search, through two hours of struggle, I still did not make it, but I know how to read the information from the file code and how to count the word frequency of the code; However, I can not put them together, nor understand the role of many code, just know its function, so I think, I should still borrow a book to carry, and then spend more time to learn java.

Tonight after three hours, and search for a search to think, but also some similar code for comparison, but I still can not change the code, I think I am incompetent, feel three hours is useless, nothing, also began to panic, really really should work hard to learn java.

Here is the code for my non-implemented features:

ImportJava.io.BufferedReader;ImportJava.io.File;ImportJava.io.FileReader;Importjava.util.Collections;ImportJava.util.HashMap;ImportJava.util.Iterator;ImportJava.util.Map;ImportJava.util.TreeMap; Public classTest { Public Static voidfindenglishnum (String text) {//Find out all the wordsString[] Array = {".", "", "?", "!"};  for(inti = 0; i < Array.Length; i++) {text= Text.replace (Array[i], ","); } string[] Textarray= Text.split (","); //Traversing Recordsmap<string, integer> map =NewHashmap<string, integer>();  for(inti = 0; i < textarray.length; i++) {String key=Textarray[i]; //Convert to lowercaseString key_l =key.tolowercase (); if(!"". Equals (key_l)) {Integer num=Map.get (key_l); if(num = =NULL|| num = = 0) {map.put (key_l,1); }Else if(num > 0) {map.put (key_l, Num+1); }                }            }            //Output to consoleSYSTEM.OUT.PRINTLN ("The frequency at which each word appears:"); Iterator<String> iter =Map.keyset (). iterator ();  while(Iter.hasnext ()) {String key=Iter.next (); Integer Num=Map.get (key); SYSTEM.OUT.PRINTLN (Key+ "\n\t\t" + num + "times \ n-------------------"); }        }                                       Public Static voidMain (string[] args) {fread ("G:\\yingyu.txt"); Findenglishnum ()}//Read file:     Public Static voidfread (String fileurl) {File file=NewFile (FileURL); BufferedReader BFR=NULL; Try{BFR=NewBufferedReader (Newfilereader (file)); String tem=NULL; String value= "";  while(tem = Bfr.readline ())! =NULL) {Value= value +tem;            } System.out.println (value); //converts a read string into a character array:            Char[] C =Value.tochararray (); //define a map to store the results://hashmap<character,integer> TM = new//hashmap<character,integer> (Collections.reverseorder ());Treemap<character, Integer> TM =NewTreemap<character, Integer> (Collections.reverseorder ());//TreeMap sortable (passing in a reversal comparator)             for(inti = 0; i < c.length; i++) {                CharCHARSRC =C[i]; if(Tm.containskey (CHARSRC)) {//determines whether the value of the key exists                    intCount =Tm.get (CHARSRC); Tm.put (CHARSRC, Count+ 1); } Else{tm.put (CHARSRC,1); }            }            //remove the keys and values from the mapIterator<map.entry<character, integer>> titer =Tm.entryset (). iterator ();  while(Titer.hasnext ()) {Map.entry<character, integer> map =Titer.next (); CharKey =Map.getkey (); intValu =Map.getvalue (); SYSTEM.OUT.PRINTLN (Key+ "appeared" + Valu + "Times!"); }        } Catch(Exception e) {System.err.println ("File read error"); } finally {            Try {                if(BfR! =NULL) {bfr.close (); }            } Catch(Exception E2) {System.err.println ("File Close Error"); }        }     }}

ImportJava.io.BufferedReader;ImportJava.io.File;ImportJava.io.FileReader;Importjava.util.ArrayList;Importjava.util.Collections;ImportJava.util.Comparator;ImportJava.util.HashMap;ImportJava.util.Iterator;Importjava.util.List;ImportJava.util.Map;ImportJava.util.Scanner; Public classTongji { Public StaticString txt2string (file file) {StringBuilder result=NewStringBuilder (); Try{bufferedreader br=NewBufferedReader (NewFileReader (file));//constructs a BufferedReader class to read the fileString s =NULL;  while((s = br.readline ())! =NULL){//use the ReadLine method to read one line at a timeResult.append (System.lineseparator () +s);                } br.close (); }Catch(Exception e) {e.printstacktrace (); }            returnresult.tostring (); }     //method for reading file information.                                        Public Static voidfindenglishnum (String text) {//Find out all the wordsString[] Array = {".", "", "?", "!"};  for(inti = 0; i < Array.Length; i++) {text= Text.replace (Array[i], ","); } string[] Textarray= Text.split (","); //Traversing Recordsmap<string, integer> map =NewHashmap<string, integer>();  for(inti = 0; i < textarray.length; i++) {String key=Textarray[i]; //Convert to lowercaseString key_l =key.tolowercase (); if(!"". Equals (key_l)) {Integer num=Map.get (key_l); if(num = =NULL|| num = = 0) {map.put (key_l,1); }Else if(num > 0) {map.put (key_l, Num+1); }               }           }           //Output to consoleSYSTEM.OUT.PRINTLN ("The frequency at which each word appears:"); Iterator<String> iter =Map.keyset (). iterator ();  while(Iter.hasnext ()) {String key=Iter.next (); Integer Num=Map.get (key); SYSTEM.OUT.PRINTLN (Key+ "\n\t\t" + num + "times \ n-------------------"); }       }                     Public Static voidMain (string[] arg) {File file=NewFile ("G:/yingyu.txt");                                            System.out.println (txt2string (file)); String ABC= "Welcome Welcome to Adempiere, a commons-based peer-production of Open Source ERP applications. This Wiki was for the global community to contribute and share know-how and domain expertise. We hope you can find as much open information and participate in making it most usable for everyone. This project have a bazaar of citizens with a Community council team which work in thefunctional team and Technical team AL Ong the software development Procedure supported and funded by the Foundation Adempiere ";                    Findenglishnum (ABC); }}

Statistical word Frequency