Convert byte [] to ArrayList<Object>

Question

I have a byte[] that i obtained using Object ArrayList<Obj>

Can anyone tell me how to convert my byte[] to Object ArrayList?

Coveting ArrayList like this:

ByteArrayOutputStream bos = new ByteArrayOutputStream();
ObjectOutputStream oos = null;
oos = new ObjectOutputStream(bos);
 
oos.writeObject(mArrayList);//mArrayList is the array to convert
byte[] buff = bos.toByteArray();

Do you want one Object per byte, as the boxed Byte? It's not clear. — Jon Skeet
– Jon Skeet, Commented Jun 26, 2012 at 19:17
i am having an ArrayList< Object> for storing purpose coverted to byte[] and i want to retrive ArrayList< Object> back from byte[] — evan
– evan, Commented Jun 26, 2012 at 19:28
Well how have you converted it to a byte array? We can't tell you how to reverse the process without that information. — Jon Skeet
– Jon Skeet, Commented Jun 26, 2012 at 19:29

Jon Skeet · Accepted Answer · 2012-06-26 19:36:12Z

19

Now you've given us the information about how you did the conversion one way... you need:

ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(bytes));
try {
    @SuppressWarnings("unchecked")
    ArrayList<Object> list = (ArrayList<Object>) ois.readObject();
    ...
} finally {
    ois.close();
}

answered Jun 26, 2012 at 19:36

Jon Skeet

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Comments

David B · Accepted Answer · 2012-06-26 19:18:36Z

-2

I'm going to go with the obvious answer here...

for(byte b : bytearray) {
  arraylist.add(new Byte(b));
}

answered Jun 26, 2012 at 19:18

David B

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1 Comment

Mattew Eon Over a year ago

I think he doesn't want to create a List of Byte

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