Here you can find the source of close(Object obj)
public static void close(Object obj)
//package com.java2s; /******************************************************************************* * Copyright (c) 2000, 2010 IBM Corporation 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:/* w w w .j a v a 2 s . c om*/ * IBM Corporation - initial API and implementation *******************************************************************************/ import java.io.*; import java.util.zip.ZipFile; public class Main { public static void close(Object obj) { if (obj == null) return; try { if (obj instanceof InputStream) ((InputStream) obj).close(); else if (obj instanceof ZipFile) ((ZipFile) obj).close(); else if (obj instanceof OutputStream) ((OutputStream) obj).close(); } catch (IOException e) { //boo } } }