java中获得文件大小代码

                File file = new File("d:\hello.gif");
                 FileInputStream fis = null;
                 try{
                     fis = new FileInputStream(file);  
                     System.out.println("文件size:"+String.valueOf(fis.available()/1000)+"k");
                 }catch(IOException e1){   
                     System.out.println("IO出错！");
                 }   
                 }catch(FileNotFoundException e2){   
                     System.out.println("找不到指定文件");
                 }