Write a program to get distinct word list from the given file.

Description:

Write a program to find all distinct words from the given file. Remove special chars like ".,;:" etc. Ignore case sensitivity.

Code:

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 package com.govindsblog.algos;   import java.io.BufferedReader; import java.io.DataInputStream; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.List; import java.util.StringTokenizer;   public class MyDistinctFileWords {       public List<String> getDistinctWordList(String fileName){           FileInputStream fis = null;         DataInputStream dis = null;         BufferedReader br = null;         List<String> wordList = new ArrayList<String>();         try {             fis = new FileInputStream(fileName);             dis = new DataInputStream(fis);             br = new BufferedReader(new InputStreamReader(dis));             String line = null;             while((line = br.readLine()) != null){                 StringTokenizer st = new StringTokenizer(line, " ,.;:\"");                 while(st.hasMoreTokens()){                     String tmp = st.nextToken().toLowerCase();                     if(!wordList.contains(tmp)){                         wordList.add(tmp);                     }                 }             }         } catch (FileNotFoundException e) {             e.printStackTrace();         } catch (IOException e) {             e.printStackTrace();         } finally{             try{if(br != null) br.close();}catch(Exception ex){}         }         return wordList;     }           public static void main(String a[]){                   MyDistinctFileWords distFw = new MyDistinctFileWords();         List<String> wordList = distFw.getDistinctWordList("C:/sample.txt");         for(String str:wordList){             System.out.println(str);         }     } }

Output:

the while statement verifies condition before entering into loop to see whether next iteration should occur or not do-while executes first without checking it after finishing each will always execute body of a at least once