casting a Object type into byte array

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How to cast a Object type into byte array in java?

Posted 26-Sep-11 1:50am

Varad Velingkar

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Nagy Vilmos · Answer 1 · 2011-09-26T02:00:00

Solution 1

If you are thinking about serailising your object, just make it Serializable[^].

Posted 26-Sep-11 2:00am

Nagy Vilmos

Comments

Mehdi Gholam 26-Sep-11 8:01am

My 5!

Varad Velingkar 26-Sep-11 8:02am

no buddi i don't want to serialize i just want to convert the data object recieved from a vector into byte array

TorstenH. 26-Sep-11 8:24am

why can't we vote for comments? this one would get my 5! *rofl*

Nagy Vilmos 26-Sep-11 8:26am

Because. Just because... ;)

Nagy Vilmos 26-Sep-11 8:26am

Why use vectors?
What is the object you are using in the Vector?

You need to decide how the internal objects are described. All the basic types such as String, int or double either support a direct conversion or can be simply converted with a few lines of code.

Instead of asking 'how to convert', think /why/ do you want a byte array? The only reason I can think of is for storage and/or communications which comes back to serialisation.

TorstenH. 26-Sep-11 9:27am

http://www.codeproject.com/Questions/260010/Fetching-binary-data-from-database
it's related to this question.

TorstenH. · Answer 2 · 2011-09-26T02:25:00

public byte[] convert(Object obj) throws IOException {
ObjectOutputStream os = null;

ByteArrayOutputStream byteStream = new ByteArrayOutputStream(5000);
os = new ObjectOutputStream(new BufferedOutputStream(byteStream));
os.flush();
os.writeObject(obj);
os.flush();
byte[] sendBuf = byteStream.toByteArray();
os.close();
return sendBuf;

}

try this.