FileInputStream fis;
   try{
    fis = new FileInputStream( "text" );
   System.out.print( "content of text is : ");
     int b;
     while( (b=fis.read())!=-1 ) //顺序读取文件text里的内容并赋值
                    给整型变量b,
直到文件结束为止。
     {              
       System.out.print( (char)b );
     }
   }catch( FileNotFoundException e ){
   System.out.println( e );
   }catch( IOException e ){
   System.out.println( e );
   }