[KEY : convert file size, readable file size, convert in]

Convert file size to readable format

1. Copy below method
   

   public static String convertSize(long size)
   {
   
   String sizeIn[] = new String[] { "KB", "MB", "GB", "TB" };
   String ret = "";
   if (size >= 1024)
   {
    int devider = 1024;
    int counter = 0;
    while (size / devider > 1024)
    {
     counter++;
     devider *= 1024;
     
    }
    ret = String.format("%.2f", (double) size / devider) + " " + sizeIn[counter];
    
    return ret;
   } else
   {
    ret = size + " bytes";
   }
   return ret;
   }
   

2. Get file length and call above method

   convertSize(new File("file.txt").length())