CODEWITHSUNDEEP
javafile-io
daveskylark
daveskylark

Reputation: 2794

Count the number of times a set of characters appear in a file without BufferedReader

I am trying to count the number of times a string appears in a file. I want to find the number of times that "A, E, I, O, U" appears exactly in that order. Here is the text file:

AEIOU aeiou baeiboeu bbbaaaaaa beaeiou caeuoi ajejijoju aeioo
aeiOu ma me mi mo mu
take it OUT!

I want the method to then return how many times it is in the file. Any idea's on how I could go about doing this? The catch is I want to do this without using BufferedReader. I can simply just read the file using Scanner. Is there a way to do this?

I edited this and added the code I have so far. I don't think I am even close. I am pretty sure I need to use some nested loops to make this happen.

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

public class AEIOUCounter 
{  
  public static final String DELIM = "\t";

  public static void main(String[] args) 
  { 
    File filename = new File("aeiou.txt");

    try
    {
      Scanner fileScanner = new Scanner(new File(filename));

      while(fileScanner.hasNextLine())
      {
        System.out.println(fileScanner.nextLine());
      }
    }
    catch(IOException e)
    {
      System.out.println(e); 
    }
    catch(Exception e)
    {
      System.out.println(e); 
    }
    fileScanner.close();
  } 
}

Upvotes: 1

Views: 94

Answers (2)

Mureinik
Mureinik

Reputation: 311348

Smurf's answer is great. It's worth mentioning that if you're using Java 8, you can avoid using a Scanner at all, and do this in a single expression:

long count =  Files.lines(Paths.get("aeiou.txt"))
                   .flatMap(s -> Arrays.stream(s.split(" ")))
                   .filter(s -> s.equalsIgnoreCase("aeiou"))
                   .count();

Upvotes: 1

user7286728
user7286728

Reputation:

What you are doing now, is printing all the lines in the file.

fileScanner.hasNextLine()
fileScanner.nextLine()

But what you are looking for is filtering out separate words in the file:

Path path = Paths.get("/path/to/file");
Scanner sc = new Scanner(path);

int counter = 0;
while (sc.hasNext()) {
    String word = sc.next();
    if (word.equalsIgnoreCase("AEIOU")) {
        counter += 1;
    }
}
System.out.print("Number of words: " + counter);

Upvotes: 1

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