Question

JAVA: create a program that reads all text files in a directory, calculates the occurrences of words, and saves the result in one single output text file.

assume that you are in a directory called Desktop/programdirectory, where you have multiple text files.

textfile1.txt : "how are you"

textfile2.txt: "great thank you"

textfile3.txt: "great to see you. see you later"

Then, your output.txt should have:

how: 1

are: 1

you: 4

great: 2

thank: 1

to: 1

see: 2

later: 1

Answer 1

ANSWER:

import java.io.*;
import java.util.*;

public class Files2file
{
public static void main(String args[]) throws FileNotFoundException //throws if any error occur while opening files
{
String content="";
File folder = new File("/home/ec2-user/java");//give the path of directory
/*This loop gets the list of files from the given folder and reads text using Scanner
stores in content variable then replaces with given string then closes the
opened file */
for (File file : folder.listFiles()) {
Scanner s = new Scanner(file);
while(s.hasNextLine())
{
content=content+s.nextLine();
content=content.replace(".","");
content=content.replace("\n"," ");
}
content=content+" ";
s.close();
}
String words[]=content.split(" "); //splits text from files using " "
/*this loop takes the words from the content gives the conunt of each word*/
int wc=1;
for(int i=0;i<words.length;i++)
{
for(int j=i+1;j<words.length;j++)
{
if(words[i].equals(words[j]))
{
wc=wc+1;
words[j]="0";
}
}
if(words[i]!="0")
System.out.println(words[i]+":"+wc);
wc=1;
}
}
}

//if any syntactical errors with the code please verify the blelow pic

OUTPUT: