Java Program to Get the File Size

import java.io.File;
public class Main
{
    public static void main(String[] args) 
    {
        //declare a String variable filePath and assign the path of file 
        //for which file you want to know the size
        String filePath = "F:\\Tutorial IoT\\SDN Cisco PPT.pdf";
        //Create a object of File class and pass that filePath as parameter
        File file = new File(filePath);
        
        //Check if file does not exist by using inbuilt exists() method
        //or check if file is not a normal file type by using inbuilt isFile() method
        //then return 
        if (!file.exists() || !file.isFile()) 
            return;
        
        //else get the file size by using length() method of File class
        System.out.println("Your File size is: ");
        System.out.println("In Bytes: "+file.length() + " bytes");
        System.out.println("In KiloBytes: "+ file.length() / 1024 + "  kb");
        System.out.println("In MegaBytes: "+file.length() / (1024 * 1024) + " mb");
    }
}

Output:

Your File size is: 
In Bytes: 11261028 bytes
In KiloBytes: 10997 kb
In MegaBytes: 10 mb