第四次java作业

 

/**  

* @param args

*/

   public static void copy(File a,File b){  

            try {         FileInputStream fis = new FileInputStream("a.mp3");      

            FileOutputStream fos = new FileOutputStream("temp.mp3");      

            byte[] buf = new byte[1024];     

            int len;  

            int read = fis.read();    

            while((len = fis.read(buf))!=-1){       

                   fos.write(buf, 0, len);     

    }        

       fis.close();  

       fos.close();    

    } catch (IOException e) {   

    // TODO Auto-generated catch block      

            e.printStackTrace();  

   }

   }

           public static void main(String[] args) {  

   // TODO Auto-generated method stub

      File a = new File("");   

      File b = new File("");  

      long start,end;    

      start = System.currentTimeMillis();   

      copy(a,b);    

      end = System.currentTimeMillis();

      System.out.println("复制所用时间：" + (end - start) + "ms"); }

}