May 18, 2017

Sreekanth B

Write a Java Program to Get Distinct Word List From The Given File


Program:

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:

package com.java2novice.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.


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