FileInputStream

package project1;import java.io.*;public class TestFileInputStream {    public static void main(String[] args)     {        // TODO Auto-generated method stub        int b=0;        FileInputStream in=null;        int num=0;        try        {            in=new FileInputStream("F:\\abc.txt");         }catch(FileNotFoundException e)        {            System.out.println("文件不存在");            //e.printStackTrace();            System.exit(-1);        }        try        {            while((b= in.read())!= -1)            {                System.out.print((char)b);                num++;            }            System.out.println();            System.out.println("字节数："+num);        }catch(IOException ioe)        {            System.out.println("文件读取错误");        }    }}}