java读取文件分析行数空格字符数字

package com.sgai;import java.io.BufferedReader;import java.io.FileReader;/** * @category 本文仅限于数字,字母,及空格 *  * @author 王俊磊 * */public class test {	public static void main(String[] args) {		String fileName = "c:/temp/hello.txt",line;		int i = 0,j = 0,f = 0,k = 0;		try {			BufferedReader in = new BufferedReader(new FileReader(fileName));			line = in.readLine();			while(null != line){				for (int l = 0; l < line.length(); l++) {					if(Character.isLetter(line.charAt(l)))						i++;					else if(Character.isDigit(line.charAt(l)))						j++;					else if(Character.isSpaceChar(line.charAt(l)))						f++;				}				line = in.readLine();				k++;							}			in.close();			System.out.println("字母="+i+"数字="+j+"空格="+f+"行数="+k);		} catch (Exception e) {			// TODO: handle exception		}	}}