Java Coding Problems

Solution based on BufferedReader

We already know from the previous problems that BufferedReader is very efficient for reading text files. Therefore, we can use it to read a big file as well. While reading, for each line obtained via BufferedReader.readLine(), we need to count the number of occurrences of the searched string via countStringInString():

public static int countOccurrences(Path path, String text, Charset ch)    throws IOException {  int count = 0;  try (BufferedReader br = Files.newBufferedReader(path, ch)) {    String line;    while ((line = br.readLine()) != null) {      count += countStringInString(line, text);    }  }  return count;}