Java tutorial
//package com.java2s; /* * Catroid: An on-device visual programming system for Android devices * Copyright (C) 2010-2014 The Catrobat Team * (<http://developer.catrobat.org/credits>) * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * An additional term exception under section 7 of the GNU Affero * General Public License, version 3, is available at * http://developer.catrobat.org/license_additional_term * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import java.io.File; public class Main { private static long getSizeOfFileOrDirectoryInByte(File fileOrDirectory) { if (!fileOrDirectory.exists()) { return 0; } if (fileOrDirectory.isFile()) { return fileOrDirectory.length(); } File[] contents = fileOrDirectory.listFiles(); long size = 0; for (File file : contents) { size += file.isDirectory() ? getSizeOfFileOrDirectoryInByte(file) : file.length(); } return size; } }