Convert Object To Byte Array Using JAVA

import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;

public class ObjectToByte {

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;

}
}