question: protected void appendPayload ( byte [ ] payloadarr ) { int oldpayloadsize = this . payload . length ; byte [ ] oldpayload = this . payload ; this . payload = new byte [ oldpayloadsize + payloadarr . length ] ; System . arraycopy ( oldpayload , 0 , this . payload , 0 , oldpayloadsize ) ; System . arraycopy ( payloadarr , 0 , this . payload , oldpayloadsize , payloadarr . length ) ; }
target:  Appends a Byte-Array to the payload