import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.io.FileOutputStream;
import java.lang.String;
import java.util.LinkedHashMap;
import java.util.Map;

public class WordStatInput {
    public static Map<String, Integer> addWord(Map<String, Integer> words, String word) {
        // :NOTE: without if, use .getOrDefault() method
        if (words.containsKey(word)) {
            words.replace(word, words.get(word), words.get(word) + 1);
        } else {
            if (word.length() > 0) {
                words.put(word, 1);
            }
        }
        return words;
    }
    public static void main(String[] args){
        Map<String, Integer> words = new LinkedHashMap<>();
        try {
            Reader reader = new BufferedReader(new InputStreamReader(
                    new FileInputStream(args[0])
            ));
            try {
                char symbol;
                StringBuilder word = new StringBuilder();
                int read = reader.read();
                symbol = (char) read;
                while (read > -1) {
                    if (Character.isLetter(symbol) || symbol == '\'' || Character.DASH_PUNCTUATION == Character.getType(symbol)) {
                        word.append(symbol);
                    } else {
                        // :NOTE: Map is passed by reference
                        words = addWord(words, word.toString().toLowerCase());
                        word.delete(0, word.length());
                    }
                    read = reader.read();
                    symbol = (char) read;
                }
                // :NOTE: same
                words = addWord(words, word.toString().toLowerCase());
            // :NOTE: FileNotFoundException can't appear here
            } catch (FileNotFoundException e) {
                System.out.println(e.getMessage());
            } finally {
                reader.close();
            }
        // :NOTE: IOException can catch not only "file not found"
        } catch (IOException e) {
            System.out.println("Input File Not Found: " + e.getMessage());
        }
        // :NOTE: put this block of code in first "try", why do you separate them?
        try {
            BufferedWriter writer = new BufferedWriter(
                    new OutputStreamWriter(
                            new FileOutputStream(args[1])
                    )
            );
            try {
                for (Map.Entry<String, Integer> output : words.entrySet())
                {
                    writer.write(output.getKey() + " " + output.getValue());
                    // :NOTE: put lineSeparator in the previous .write() call, why do you separate them?
                    writer.write(System.lineSeparator());
                }
            } catch (FileNotFoundException e) {
                System.out.println("Output File Not Found: " + e.getMessage());
            } finally {
                writer.close();
            }
        // :NOTE: same
        } catch (IOException e) {
            System.out.println("Output File Not Found: " + e.getMessage());
        }
    }
}