public class Ex19_10 {

    public static void main(String[] args) throws IOException{
        // TODO 自动生成方法存根
        if(args.length!=2){
            System.out.println("Invalid param");
            System.exit(0);
        }
        
        BufferedInputStream input = new BufferedInputStream(
                new FileInputStream(args[0]));
        
        int numberOfPieces = Integer.parseInt(args[1]);
        long splitFileSize = (int)(Math.ceil(1.0*input.available()/numberOfPieces));
        System.out.println("FileSize: "+input.available()+" bytes");
        
        for(int i = 1; i<= numberOfPieces; i++){
            int count = 0;
            int value = 0;
            BufferedOutputStream output = new BufferedOutputStream(
                    new FileOutputStream(i+".txt"));
            
            while((count++<splitFileSize)&&(( value = input.read())!=-1))
                output.write(value);
            
            output.close();
        }
        
        input.close();
    }

}