Java Utililty Methods Byte Array to Object

if (array == null) {
    return null;
try {
    return deserializeRaw(array);
} catch (IOException e) {
    e.printStackTrace();
    return null;
...

Object obj = null;
ObjectInputStream oin = null;
try {
    ByteArrayInputStream bin = new ByteArrayInputStream(b);
    oin = new ObjectInputStream(bin);
    obj = oin.readObject();
    return obj;
} finally {
...

if (blob == null) {
    throw new IllegalArgumentException("null blob to deserialize");
ByteArrayInputStream bstream = new ByteArrayInputStream(blob);
ObjectInputStream istream = new ObjectInputStream(bstream);
return istream.readObject();

ByteArrayInputStream bais = new ByteArrayInputStream(buf);
ObjectInputStream ois = new ObjectInputStream(bais);
try {
    return (Serializable) ois.readObject();
} catch (ClassNotFoundException ex) {
    ex.printStackTrace();
    throw new IllegalStateException(ex.getMessage());
} finally {
...

try {
    ByteArrayInputStream bis = null;
    try {
        bis = new ByteArrayInputStream(buf);
        ObjectInputStream oin = null;
        try {
            oin = new ObjectInputStream(bis);
            return (T) oin.readObject();
...

try {
    Object[] objects = new Object[count];
    ByteArrayInputStream bais = new ByteArrayInputStream(buffer);
    ObjectInputStream ois = new ObjectInputStream(bais);
    for (int i = 0; i < count; i++)
        objects[i] = ois.readObject();
    ois.close();
    return objects;
...

return deserialize(byteArray, Thread.currentThread().getContextClassLoader());

ObjectInputStream oip = null;
try {
    oip = new ObjectInputStream(new ByteArrayInputStream(byteArray));
    @SuppressWarnings("unchecked")
    T result = (T) oip.readObject();
    return result;
} catch (IOException e) {
    throw new IllegalArgumentException(e);
...

if (bytes == null) {
    return null;
try {
    ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(bytes));
    return ois.readObject();
} catch (IOException ex) {
    throw new IllegalArgumentException("Failed to deserialize object", ex);
...

if ((bytes == null) || (bytes.length == 0))
    return null;
ByteArrayInputStream byteStream = new ByteArrayInputStream(bytes);
try {
    ObjectInputStream stream = new ObjectInputStream(byteStream);
    try {
        return stream.readObject();
    } finally {
...