DirectoryUtils.java

package com.github.lwhite1.tablesaw.testutil;

import java.io.File;


public class DirectoryUtils {

    public static boolean deleteDirectory(File directory) {
        if (directory.exists()) {
            File[] files = directory.listFiles();
            if (null != files) {
                for (int i = 0; i < files.length; i++) {
                    if (files[i].isDirectory()) {
                        deleteDirectory(files[i]);
                    } else {
                        files[i].delete();
                    }
                }
            }
        }
        return (directory.delete());
    }

    public static long folderSize(File directory) {
        long length = 0;
        for (File file : directory.listFiles()) {
            if (file.isFile()) {
                length += file.length();
            } else {
                length += folderSize(file);
            }
        }
        return length;
    }
}