HomeWork8(2)

TextLetters.java

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

/**
 *
 * @author kamaz
 */
public class Main {
    
    public static void main(String[] args) {
        // TODO code application logic here
        File file = new File("text.txt");
        String text = readFile(file);
	Map<Character, Integer> map = new HashMap<Character, Integer>();
            for(int i = 0; i < text.length(); i++) {
		char ch = text.charAt(i);
                if (Character.isLetter(ch)) {
                    int count = map.get(ch) != null ? map.get(ch) : 0;
                    count++;
                    map.put(ch, count);
                }
            }
		
            for(Iterator<Character> it = map.keySet().iterator(); it.hasNext(); ) {
		Character key = it.next();
		System.out.println(key + " = " + map.get(key));
            }
    
    }
    
    public static String readFile(File file) {
        StringBuilder sb = new StringBuilder();
            try (BufferedReader br = new BufferedReader(new FileReader(file))) {
                String text = "";
                for (; (text = br.readLine()) != null;) {
                    sb.append(text);
                    sb.append(System.lineSeparator());
                }
            } catch (IOException e) {
                System.out.println(e);
            }
            return sb.toString();
    }
    
}