Read a file and count the occurrence of word in java
import java.io.File;
import java.io.FileReader;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.util.TreeMap;
import java.util.StringTokenizer;
public class fileRead {
public static void main(String [] args){
try{
String textFile =”D:\workspace\datastructure\src\javaprogram\test.txt”;
BufferedReader input = new BufferedReader(new FileReader(textFile));
//Creating the Map to store the words and their occurrences
TreeMap<String, Integer> frequencyMap = new TreeMap<String, Integer>();
String currentLine = null;
//Reading line by line from the text file
while((currentLine = input.readLine()) != null){
//Parsing the words from each line
StringTokenizer parser = new StringTokenizer(currentLine, ” tnrf.,;:!?'””);
while(parser.hasMoreTokens()){
String currentWord = parser.nextToken();
Integer frequency = frequencyMap.get(currentWord);
if(frequency == null){
frequency = 0;
}
//Putting each word and its occurrence into Map
frequencyMap.put(currentWord, frequency + 1);
}
}
//Displaying the Result
System.out.println(frequencyMap);
}catch(IOException ie){
ie.printStackTrace();
System.err.println(“Your entered path is wrong”);
}
}
}