JAVA Interview question: Find most frequency word in a paragraph

My Answer:

package testjava; import java.io.bufferedreader;import java.io.file;import  java.io.filereader;import java.util.arraylist;import java.util.hashmap;import  java.util.iterator;import java.util.map;import java.util.map.entry; public class  findmostfrequency {    arraylist<string> words = new  Arraylist<string> ();     hashmap<string, integer> word_frequency  = new HashMap<String, Integer> ();    hashmap<string,  Integer> word_position = new hashmap<string, integer> ();      public static void main (String[] args)  {         // TODO Auto-generated method stub          findmostfrequency find = new findmostfrequency ();         find.readfile ("D:/test.txt");         HashMap<String, Integer>  result =  Find.findmostfrequencyword ();         system.out.println (Result);     }     public string replacepunc (STRING&NBSP;STR)  {         return str.replaceall ("[\\pP]",  " ");     }     public string[] convertstr (STRING&NBSP;STR)  {         return str.split ("\\s+");    }      public void readfile (String filepath)  {         file file = new file (FilePath);         if  (FILe.exists ())  {            try {                 BufferedReader  Br = new bufferedreader (New filereader (file));                 String line = null;                 int linenum=1;                 while  (line =  br.readline ())  != null)  {                     string[] wordlist = this.convertstr (This.replacepunc (line));                     int count = 0;                     String word = null;                     for  (int  i = 0; i < wordlist.length; i++)  {                          word=wordList[i];                         if  (Words.contains (word))  {                              count = word_frequency.get (word)  + 1;                              word_frequency.put (Word, count);                         }  else {                             words.add (word);                              word_frequency.put (word, 1);                              this.word_position.put (Word, linenum);                         }                     }                     linenum+ +;                }                 br.close ();             } catch  (exception e)  {                 // todo  Auto-generated catch block                 e.printstacktrace ();             }         } else {             system.out.println ("This file doesn ' t exist!");         }    }     public  hashmap<string,integer> findmostfrequencyword () {         int max=0;        hashmap<string,integer> res  = new HashMap<String,Integer> (        iterator); <entry<string, integer>> it=this.word_frequency.entryset (). Iterator ();         while (It.hasnext ()) {             map.entry<string, integer> entry=it.next ();             if (ENTRY.GEtvalue () >max) {                 res = new HashMap<String,Integer> ();                 res.put (Entry.getkey (), This.word_position.get ( Entry.getkey ()));                 max=entry.getvalue ();            }             else if (Entry.getValue () ==max) {                 res.put (Entry.getKey (), This.word_position.get (Entry.getkey ()));             }            else{                 continue;             }        }        return  res;    }}

JAVA Interview question: Find most frequency word in a paragraph