Read the file Contents

The given code read the file content and print the no.of words and Numbers.

import java.io.*;
class  CountWordsAndNumberFromFile{
    public static void main(String[] args) throws Exception
    {
        BufferedReader br=new BufferedReader(new FileReader(new File("c:/A.txt")));
        String str="",st="";
        while((str=br.readLine())!=null){
          st+=str+" ";
        }
        String s=st.replace(","," ");
        String array[]=s.split(" ");
        int word=0,num=0;
        for(int i=0;i<array.length;i++){
            if (array[i].matches("((-|\\+)?[0-9]+(\\.[0-9]+)?)+")) {  
            num++;
        } else {  
            word++;  
        }
        }
        System.out.println("Number of numbers: "+num);
        System.out.println("Number of words: "+word);
    }
}