Java tutorial
//package com.java2s; /* * Copyright (C) 2013 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; public class Main { public static byte[] readFully(File file) throws IOException { final InputStream in = new FileInputStream(file); try { ByteArrayOutputStream bytes = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; int count; while ((count = in.read(buffer)) != -1) { bytes.write(buffer, 0, count); } return bytes.toByteArray(); } finally { in.close(); } } }