Get all files from parent/sub folders along with file size

In Java, you can use the File.length() method to get the file size in bytes and folder.listFiles() method to get all file/folders.

sample code

	/*
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	*/
	package mayan.file_related;
	import java.io.File;
	import java.text.DecimalFormat;
	/**
	*
	* @author Uttesh Kumar T.H.
	*/
	public class GetAllFiles {
	final static String[] units = new String[]{"B", "kB", "MB", "GB", "TB"};
	public static void main(String[] args) {
	String folderPath = "folder path";
	final File folder = new File(folderPath);
	listFiles(folder);
	}
	public static void listFiles(final File folder) {
	for (final File fileEntry : folder.listFiles()) {
	if (fileEntry.isDirectory()) {
	listFiles(fileEntry);
	} else {
	String size = fileEntry.length() <= 0 ? "0" : fileSize(fileEntry.length());
	System.out.println(size);
	}
	}
	}
	public static String fileSize(long size) {
	int digitGroups = (int) (Math.log10(size) / Math.log10(1024));
	return new DecimalFormat("#,##0.#").format(size / Math.pow(1024, digitGroups)) + " " + units[digitGroups];
	}
	}

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