Here you can find the source of delete(File file)
public static void delete(File file)
//package com.java2s; /******************************************************************************* * Copyright (c) 2012, 2014 EclipseSource and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors:/*from ww w . j a v a 2 s . com*/ * EclipseSource - initial API and implementation ******************************************************************************/ import java.io.File; public class Main { public static void delete(File file) { if (file.isDirectory()) { deleteChildren(file); } deleteFile(file); } private static void deleteChildren(File file) { for (File child : file.listFiles()) { delete(child); } } private static void deleteFile(File file) { if (!file.delete() && file.exists()) { throw new IllegalStateException("Could not delete: " + file.getPath()); } } }