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CountDuplicateWords.java

A java program to find maximum repeated duplicate words in a text file.
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muralidhar9e committed Jul 9, 2015
1 parent 339c0f2 commit c8eabc97b3222b18c982e086fd7f69c9a690e417
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package com.java;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.StringTokenizer;
/**
* @author javabynataraj.blogspot.com
*
*/
public class CountDuplicateWords {
public Map<String, Integer> getWordCount(String fileName){
BufferedReader br = null;
Map<String, Integer> wordMap = new HashMap<String, Integer>();
try {
br = new BufferedReader(new InputStreamReader(new FileInputStream(fileName)));
String line = null;
while((line = br.readLine()) != null){
StringTokenizer st = new StringTokenizer(line, " ");
while(st.hasMoreTokens()){
String temp = st.nextToken().toLowerCase();
if(wordMap.containsKey(temp)){
wordMap.put(temp, wordMap.get(temp)+1);
} else {
wordMap.put(temp, 1);
}
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally{
try{
if(br != null)
br.close();
}catch(Exception ex){}
}
return wordMap;
}
public List<Entry<String, Integer>> sortByValue(Map<String, Integer> wordMap){
Set<Entry<String, Integer>> set = wordMap.entrySet();
List<Entry<String, Integer>> list = new ArrayList<Entry<String, Integer>>(set);
Comparator<Map.Entry<String, Integer>> comparator = new Comparator<Map.Entry<String, Integer>>(){
public int compare( Map.Entry<String, Integer> o1, Map.Entry<String, Integer> o2 ){
return (o2.getValue()).compareTo( o1.getValue() );
}
};
Collections.sort( list, comparator);
return list;
}
public static void main(String a[]){
CountDuplicateWords mdc = new CountDuplicateWords();
Map<String, Integer> wordMap = mdc.getWordCount("C:/MyTestFile.txt");
List<Entry<String, Integer>> list = mdc.sortByValue(wordMap);
for(Map.Entry<String, Integer> entry:list){
System.out.println(entry.getKey()+" ===>> "+entry.getValue());
}
}
}

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