//?Can?you?spot?the?"memory?leak"? import?java.util.Arrays; public?class?Stack?{ ????private?Object[]?elements; ????private?int?size?=?0; ????private?static?final?int?DEFAULT_INITIAL_CAPACITY?=?16; ????public?Stack()?{ ????????elements?=?new?Object[DEFAULT_INITIAL_CAPACITY]; ????} ????public?void?push(Object?e)?{ ????????ensureCapacity(); ????????elements[size++]?=?e; ????} ????public?Object?pop()?{ ????????if?(size?==?0) ????????????throw?new?EmptyStackException(); ????????return?elements[--size]; ????} ????/** ?????*?Ensure?space?for?at?least?one?more?element,?roughly ?????*?doubling?the?capacity?each?time?the?array?needs?to?grow. ?????*/ ????private?void?ensureCapacity()?{ ????????if?(elements.length?==?size) ????????????elements?=?Arrays.copyOf(elements,?2?*?size?+?1); ????} } 這段代碼會發生內存泄漏，無論我如何寫測試類，都沒有發生內存泄漏。