Here you can find the source of getBytes(Class cls, String resourceName)
public static byte[] getBytes(Class<?> cls, String resourceName) throws java.io.IOException
//package com.java2s; /******************************************************************************* * Copyright (c) 2006, 2015, Carnegie Mellon University. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. Products derived from the software may not be called "Alice", nor may * "Alice" appear in their name, without prior written permission of * Carnegie Mellon University.//from ww w . j a va2 s .c om * * 4. All advertising materials mentioning features or use of this software must * display the following acknowledgement: "This product includes software * developed by Carnegie Mellon University" * * 5. The gallery of art assets and animations provided with this software is * contributed by Electronic Arts Inc. and may be used for personal, * non-commercial, and academic use only. Redistributions of any program * source code that utilizes The Sims 2 Assets must also retain the copyright * notice, list of conditions and the disclaimer contained in * The Alice 3.0 Art Gallery License. * * DISCLAIMER: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND. * ANY AND ALL EXPRESS, STATUTORY OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A * PARTICULAR PURPOSE, TITLE, AND NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT * SHALL THE AUTHORS, COPYRIGHT OWNERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING FROM OR OTHERWISE RELATING TO * THE USE OF OR OTHER DEALINGS WITH THE SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. *******************************************************************************/ public class Main { public static byte[] getBytes(java.io.InputStream is) throws java.io.IOException { byte[] buffer = null; java.io.ByteArrayOutputStream baos = null; while (true) { int n = is.available(); if (buffer != null) { // handle the previous iteration if (baos != null) { //pass } else { // it is the second iteration if (n > 0) { // more than one buffer so we use a ByteArrayOutputStream baos = new java.io.ByteArrayOutputStream(); } else { // there is one and only one buffer, so simply return it return buffer; } } // will only get here if there are 2 or more buffers baos.write(buffer); } if (n > 0) { buffer = new byte[n]; int offset = 0; while (offset < n) { offset += is.read(buffer, offset, n - offset); } assert offset == n; } else { break; } } return baos.toByteArray(); } public static byte[] getBytes(java.io.File file) throws java.io.IOException { java.io.FileInputStream fis = new java.io.FileInputStream(file); try { return getBytes(fis); } finally { fis.close(); } } public static byte[] getBytes(Class<?> cls, String resourceName) throws java.io.IOException { java.io.InputStream is = cls.getResourceAsStream(resourceName); try { return getBytes(is); } finally { is.close(); } } }