void save(){
  if (registerSave == null) {
    registerSave=new byte[blockSize];
  }
  System.arraycopy(register,0,registerSave,0,blockSize);
}

void save ( ) { if ( registerSave == null ) { registerSave = new byte [ blockSize ] ; } System . arraycopy ( register , 0 , registerSave , 0 , blockSize ) ; }
save the current content of this cipher .
