Java Utililty Methods File to Byte Array

byte[] result;
try (FileInputStream fileInputStream = new FileInputStream(file)) {
    result = new byte[(int) file.length()];
    fileInputStream.read(result);
return result;

final byte[] data = new byte[Math.toIntExact(file.length())];
try (FileInputStream fis = new FileInputStream(file)) {
    fis.read(data);
return data;

try {
    FileInputStream fis = new FileInputStream(file);
    byte[] result = new byte[fis.available()];
    fis.read(result);
    fis.close();
    return result;
} catch (Exception e) {
    e.printStackTrace();
...

byte[] byteArray = new byte[(int) file.length()];
InputStream fis = new FileInputStream(file);
fis.read(byteArray);
fis.close();
return byteArray;

long numOfBytes = file.length();
if (numOfBytes > Integer.MAX_VALUE) {
    throw new IOException("File is to large to be read in to a byte array");
byte[] bytes = new byte[(int) numOfBytes];
FileInputStream ins = new FileInputStream(file);
int offset = 0;
int numRead = 0;
...

final FileInputStream is = new FileInputStream(f);
final byte[] ret = new byte[(int) f.length()];
int p = 0;
while (p < ret.length)
    p += is.read(ret, p, ret.length - p);
is.close();
return ret;

InputStream contents = null;
try {
    contents = file.getContents();
    return ByteStreams.toByteArray(contents);
} finally {
    if (contents != null)
        contents.close();

if (COMPILE_FOR_JAVA) {
    File file = new File(filePath);
    byte[] bytes = null;
    try {
        FileInputStream fis = new FileInputStream(file);
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        byte[] buf = new byte[1024];
        try {
...

File file = new File(fname);
FileInputStream fis = null;
try {
    fis = new FileInputStream(fname);
} catch (FileNotFoundException e) {
    return null;
byte[] fileContents = new byte[(int) file.length()];
...

File file = new File(path);
if (!file.exists() || file.isDirectory()) {
    return null;
FileInputStream in = null;
try {
    byte[] array = new byte[(int) file.length()];
    in = new FileInputStream(file);
...