Question

JAVA: Make a single-threaded program that counts words in a text file and prints the result in an output.txt

example:

if a input.txt file has a string "There was an apple, which was in there.", the output.txt should have:

there: 2

was : 2

an : 1

apple : 1

which :1

in : 1

Answer 1

import java.io.*;
import java.util.*;
public class Main
{
public static void main(String[] args)
{
try
{
//variable declaration
int wordCount;
String input = "";
String line = null;
  
FileReader fr=new FileReader("input.txt");
BufferedReader br=new BufferedReader(fr);
BufferedWriter writer = new BufferedWriter(new FileWriter("output.txt"));
  
while ((line = br.readLine()) != null)
{
input += line;
}
  
String inputLC = input.toLowerCase();
String[] words=inputLC.split(" ");
  
wordCount = 1;
  
for(int i=0;i<words.length;i++)
{
for(int j=i+1;j<words.length;j++)
{
if(words[i].equals(words[j]))
{
wordCount=wordCount+1;   
words[j]="0";
}
}
if(words[i]!="0")
{
//write into the output.txt file
writer.write(words[i]+" : "+wordCount+"\n");
}
wordCount=1;
}
writer.close();
}
catch (IOException e)
{
System.out.println(e);
}
}
}

OUTPUT:

output.txt

there : 2 was: 2 an : 1 apple, : 1 which : 1 in : 1