// Utilities.java - Utilities to support file statistics
// Author: ?????
// Date:   ?????
// Class:  CS163/CS164
// Email:  ?????

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;

public class Utilities {

    // Read the lines in a file into an array list 
    public static ArrayList<String> readLines(String infile) {

        ArrayList<String> lines = new ArrayList<String>();
        try {
            Scanner reader = new Scanner(new File(infile));
            while (reader.hasNextLine())
                lines.add(reader.nextLine());
            reader.close();
        } catch (IOException e) {
            System.out.println("Cannot read: " + infile);
        }
        return lines;
    }

    // Read the tokens in a file into an array list 
    public static ArrayList<String> readWords(String infile) {

        ArrayList<String> words = new ArrayList<String>();
        // STUDENT CODE HERE
        // Same as previous method except read tokens instead of lines
        return words;
    }
    
    // Count the frequency of specified character in array list
    public static int frequency(ArrayList<String> strings, char match) {

        int frequency = 0;
        for (String string : strings) {
            for (char character : string.toCharArray()) {
                char lower = Character.toLowerCase(match);
                char upper = Character.toUpperCase(match);
                if (character == lower || character == upper )
                    frequency++;
            }
        }
        return frequency;
    }
}