DemTu

/*
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 */
package Demsotu;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Scanner;

/**
 *
 * @author Anh-Kool
 */
public class Demtu {

    public static void main(String[] args) throws IOException{
        HashMap<String, Integer> hm = new HashMap<String, Integer>();
        ArrayList<String> al = new ArrayList<String>();
        String duongdan;
        Scanner s = new Scanner(System.in);
        System.out.print("Mơi ban nhap duong dan tap tin: ");
        duongdan = s.nextLine();
        FileReader fr = new FileReader(duongdan);
        BufferedReader br = new BufferedReader(fr);
        String dong;
        while ((dong = br.readLine()) != null) {
            al.add(dong);
        }
        for (int i = 0; i < al.size(); i++) {
            String[] arr = al.get(i).split(" ");
            for (int j = 0; j < arr.length; j++) {
                String str = arr[j];
                if(!hm.containsKey(str)){
                    hm.put(str, 1);
                }else{
                    int n = hm.get(str).intValue();
                    n++;
                    hm.put(str, n);
                }
            }
        }
        System.out.println("Cac tu dem duoc la: ");
        for (String k : hm.keySet()) {
            Integer v = hm.get(k);
            System.out.println(k+ " : "+ v);
        }
    }
}