private void grow(){
  final int newsize=store.length + (store.length >>> 1);
  final int[] prev=store;
  store=new int[newsize];
  System.arraycopy(prev,0,store,0,size);
}

private void grow ( ) { final int newsize = store . length + ( store . length > > > 1 ) ; final int [ ] prev = store ; store = new int [ newsize ] ; System . arraycopy ( prev , 0 , store , 0 , size ) ; }
grow array by 50 % .
