How to get the size of a file in MB (Megabytes)?

Question

I have a zip file on a server.

How can I check if the file size is larger than 27 MB?

File file = new File("U:\intranet_root\intranet\R1112B2.zip"); if (file > 27) {    //do something } 

Answer 1

Use the length() method of the File class to return the size of the file in bytes.

// Get file from file name File file = new File("U:\intranet_root\intranet\R1112B2.zip");  // Get length of file in bytes long fileSizeInBytes = file.length(); // Convert the bytes to Kilobytes (1 KB = 1024 Bytes) long fileSizeInKB = fileSizeInBytes / 1024; // Convert the KB to MegaBytes (1 MB = 1024 KBytes) long fileSizeInMB = fileSizeInKB / 1024;  if (fileSizeInMB > 27) {   ... } 

You could combine the conversion into one step, but I've tried to fully illustrate the process.

Answer 2

Try following code:

File file = new File("infilename");  // Get the number of bytes in the file long sizeInBytes = file.length(); //transform in MB long sizeInMb = sizeInBytes / (1024 * 1024);