Question

MUST BE IN JAVA AND USE RECURSION

Write a recursive method that returns the number of all occurrences of a given word in all the files under a directory. Write a test program. Use the following header:

public static long findInFile(File file, String word)

Answer 1

public static long findInFile(File file, String word) throws FileNotFoundException {
    return findInFileHelper(new Scanner(file),word);
}

public static long findInFileHelper(Scanner scan, String word){
    if(scan.hasNext()){
        if(scan.next().equals(word)){
            return 1+findInFileHelper(scan,word);
        }
        else{
            return findInFileHelper(scan,word);
        }
    }
    else{
        return 0;
    }
}