Get File size in bytes

/*
  Get File size in bytes
  This Java example shows how to get the size of a particular file in bytes,
  KB and MB using length method of Java File class.
*/
 
import java.io.*;
 
public class GetFileSizeInByetes {
 
  public static void main(String[] args) {
 
    //create file object
    File file = new File("C://FileIO/demo.txt");
 
    /*
     * To get the size of a file, use
     * long length() method of Java File class.
     *
     * This method returns size of a particular file in bytes. It returns 0L
     * if file does not exists, and unspecified if file is a directory.
     *
     */
 
     long fileSize = file.length();
 
     System.out.println("File size in bytes is: " + fileSize);
     System.out.println("File size in KB is : " + (double)fileSize/1024);
     System.out.println("File size in MB is :" + (double)fileSize/(1024*1024));
  }
}
 
/*
Output would be
File size in bytes is: 492480
File size in KB is : 480.9375
File size in MB is :0.46966552734375
*/