Persistent and transient objects

Question

New operator creates persistent objects in the case of fields of a class.
Local variables are put on the RAM stack.
Does that mean, that, in the case of local variables, new operator creates objects in RAM, or I have to use makeTransientByteArray?
Edited by: Dome313 on Apr 8, 2010 6:27 AM

Answer 1

If I get it right, in the case of local variables, new operator will place object reference to the stack, but the actual object content will be in EEPROM.
So should I create local variables using makeTransientXArray? For example
     private byte[] deriveSessionKey(Cipher cipher, byte[] input)
          byte[] output = JCSystem.makeTransientByteArray((short)16, JCSystem.CLEAR_ON_RESET);
          byte[] ret = JCSystem.makeTransientByteArray((short)8, JCSystem.CLEAR_ON_RESET);
          byte[] rand = JCSystem.makeTransientByteArray((short)6, JCSystem.CLEAR_ON_RESET);
          Util.arrayCopy(input, (short)0, rand, (short)0, (short)6);
          rand[2] = (byte) 0xF0;               
          cipher.doFinal(rand, (short)0, (short)6, output, (short)0);
          Util.arrayCopy(output, (short)0, ret, (short)0, (short)8);
          return ret;
     }or should I define them as a class variables (because there may not be GC) and then use them in class methods?
Edited by: Dome313 on Apr 8, 2010 7:58 AM