Java Utililty Methods File to Byte Array

FileInputStream fis = null;
ByteArrayOutputStream baos = null;
byte[] rtrn = new byte[0];
try {
    fis = new FileInputStream(f);
    baos = new ByteArrayOutputStream();
    int b;
    while ((b = fis.read()) != -1)
...

if (file.length() > Integer.MAX_VALUE) {
    throw new IOException("File '" + file.getName() + "' is bigger than Integer.MAX_VALUE (>2GB)");
InputStream in = new FileInputStream(file);
byte[] bytes = new byte[(int) file.length()];
int len = 0;
len = in.read(bytes);
if (len != bytes.length) {
...

InputStream is = new FileInputStream(file);
try {
    return getBytesFromStream(is);
} finally {
    is.close();

InputStream is = new FileInputStream(file);
long length = file.length();
if (length > Integer.MAX_VALUE) {
byte[] bytes = new byte[(int) length];
int offset = 0;
int numRead = 0;
while (offset < bytes.length && (numRead = is.read(bytes, offset, bytes.length - offset)) >= 0) {
...

FileInputStream stream = new FileInputStream(file);
int size = stream.available();
byte[] bytes = new byte[size];
stream.read(bytes);
stream.close();
return bytes;

if (file == null) {
    return null;
} else {
    FileInputStream stream = null;
    ByteArrayOutputStream out = null;
    try {
        stream = new FileInputStream(file);
        out = new ByteArrayOutputStream(1000);
...

byte[] ret = null;
try {
    if (file == null) {
        return null;
    FileInputStream in = new FileInputStream(file);
    ByteArrayOutputStream out = new ByteArrayOutputStream(4096);
    byte[] b = new byte[4096];
...

if (file == null) {
    return null;
InputStream is = new BufferedInputStream(new FileInputStream(file));
byte[] bytes;
try {
    long length = file.length();
    if (length > Integer.MAX_VALUE) {
...

byte[] buffer = null;
BufferedInputStream bis = null;
InputStream fis = null;
try {
    if (file.exists()) {
        fis = new FileInputStream(file.getAbsolutePath());
        bis = new BufferedInputStream(fis);
        int len = (int) file.length();
...

InputStream is = new FileInputStream(file);
long length = file.length();
if (length > Integer.MAX_VALUE) {
    is.close();
    throw new IOException("File is to large " + file.getName());
byte[] bytes = new byte[(int) length];
int offset = 0;
...