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Hi guys,
how do i convert an hash map into a byte array(being able to restore
this later , without losing data)?
thanks a lot!
bye

andrewzzz wrote:
> how do i convert an hash map into a byte array(being able to restore
> this later , without losing data)?

Serialization !

Arne

On 11 Nov, 20:39, Arne Vajhøj <a...@vajhoej.dk> wrote:
> andrewzzz wrote:
> > how do i convert an hash map into a byte array(being able to restore
> > this later , without losing data)?Serialization !
>
> Arne

can you send me link where to find out how?
thanks arne!

andrewzzz wrote:
> On 11 Nov, 20:39, Arne Vajhøj <a...@vajhoej.dk> wrote:
>> andrewzzz wrote:
>>> how do i convert an hash map into a byte array(being able to restore
>>> this later , without losing data)?Serialization !
>
> can you send me link where to find out how?

private static byte[] serialize(Object o) throws IOException {
ByteArrayOutputStream ba = new ByteArrayOutputStream(1000);
ObjectOutputStream oba = new ObjectOutputStream(ba);
oba.writeObject(o);
return ba.toByteArray();
}

private static Object deserialize(byte[] b) throws IOException,
ClassNotFoundException {
ByteArrayInputStream ba = new ByteArrayInputStream(b);
ObjectInputStream oba = new ObjectInputStream(ba);
return oba.readObject();
}

All objects need to be serializable for this to work though !

Arne

On 11 Nov, 20:53, Arne Vajhøj <a...@vajhoej.dk> wrote:
> andrewzzz wrote:
> > On 11 Nov, 20:39, Arne Vajhøj <a...@vajhoej.dk> wrote:
> >> andrewzzz wrote:
> >>> how do i convert an hash map into a byte array(being able to restore
> >>> this later , without losing data)?Serialization !
>
> > can you send me link where to find out how? private static byte[] serialize(Object o) throws IOException {
> ByteArrayOutputStream ba = new ByteArrayOutputStream(1000);
> ObjectOutputStream oba = new ObjectOutputStream(ba);
> oba.writeObject(o);
> return ba.toByteArray();
> }
>
> private static Object deserialize(byte[] b) throws IOException,
> ClassNotFoundException {
> ByteArrayInputStream ba = new ByteArrayInputStream(b);
> ObjectInputStream oba = new ObjectInputStream(ba);
> return oba.readObject();
> }
>
> All objects need to be serializable for this to work though !
>
> Arne



thanks so much! I will try now!