Split and count Words from the text in the Given Text File and Compare using Comparator [JAVA]

Split and count Words from the text in the Given Text File and Compare using Comparator in Java, It is basically used in big data operations.

package com.yubraj.core;

/**
 * Created by yubraj_pokharel on 5/23/16.
 */

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.*;

public class Main {


    public static void main(String[] args) throws IOException {
        String text_from_file = getTextFromFile();
        text_from_file = trim_non_alpha(text_from_file);
        String[] final_text = text_from_file.split("[- .,]");

        ArrayList<String> myText = new ArrayList<>();
        myText = getStringIntoArrayList(final_text);

        List<HashMap<String, Integer>> final_map = new ArrayList<>();

        HashMap<String, Integer> map = new HashMap<String, Integer>();
        for (String temp : myText) {
            Integer count = map.get(temp);
            map.put(temp, (count == null) ? 1 : count + 1);
        }
        final_map.add(map);
        Collections.sort(final_map, new MapComparator());
        print_format(final_map);

    }

    private static void print_format(List<HashMap<String, Integer>> final_map) {

        for(int i =0; i<final_map.size(); i++){
            HashMap<String, Integer> new_hashmap = final_map.get(i);
            Set entrySet = new_hashmap.entrySet();
            Iterator it = entrySet.iterator();
            while (it.hasNext()){
                Map.Entry me = (Map.Entry)it.next();
                System.out.println("["+me.getKey()+"] = "+me.getValue());
            }
        }

    }

    private static ArrayList<String> getStringIntoArrayList(String[] final_text) {
        ArrayList<String> tempArray = new ArrayList<>();
        for (int i = 0; i < final_text.length; i++) {
            tempArray.add(final_text[i]);
        }
        return tempArray;
    }

    private static String trim_non_alpha(String text) {
        String temp;
        temp = text.replaceAll("\\b\\w+?[0-9]+\\w+?\\b", "").trim();
        return temp;
    }

    private static String getTextFromFile() throws IOException {
        String everything;

        try (BufferedReader br = new BufferedReader(new FileReader("/home/yubraj_pokharel/big_data_Class/input123.txt"))) {
            StringBuilder sb = new StringBuilder();
            String line = br.readLine();

            while (line != null) {
                sb.append(line);
                sb.append(System.lineSeparator());
                line = br.readLine();
            }
            everything = sb.toString();
        }
        return everything;
    }


    private static class MapComparator implements Comparator<HashMap<String, Integer>> {
        @Override
        public int compare(HashMap<String, Integer> first, HashMap<String, Integer> second) {
            String firstValue = first.keySet().iterator().next();
            String secondValue = second.keySet().iterator().next();
            return firstValue.compareTo(secondValue);
        }
    }
}

Input:: 

this is java and this is awesome

Output::

[awesome] = 1

[java] = 1

[and] = 1

[this] = 2

[is] = 2

Happy Coding !!!