// Java program to Get the size of a directory

import java.io.File;

class GFG {
    private static long getFolderSize(File folder)
    {
        long length = 0;
      
        // listFiles() is used to list the
        // contents of the given folder
        File[] files = folder.listFiles();

        int count = files.length;

        // loop for traversing the directory
        for (int i = 0; i < count; i++) {
            if (files[i].isFile()) {
                length += files[i].length();
            }
            else {
                length += getFolderSize(files[i]);
            }
        }
        return length;
    }

    // Driver Code
    public static void main(String[] args)
    {
        // Creating an instances of file class
        File file1 = new File("/home/mayur/Downloads");

        long size = getFolderSize(file1);
        // Size of folder in Bytes
        System.out.println("Size of " + file1 + " is "
                           + size + " B");
        // Size of folder in Kilobytes
        System.out.println("Size of " + file1 + " is "
                           + (double)size / 1024 + " KB");
        // Size of folder in Megabytes
        System.out.println("Size of " + file1 + " is "
                           + (double)size / (1024 * 1024)
                           + " MB");
    }
}