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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                ### Stack Stack繼承于Vector,在其基礎上實現了Stack要求的后進先出LIFO的彈出及壓入操作,提供了push/pop/peek等主要方法 * **push\(\)**:通過調用Vector中的addElement來完成 ``` public E push(E item) { addElement(item); return item; } ``` * **pop\(\)**:通過調用peek\(\)獲取最后一個元素,并刪除最后一個元素 ``` public synchronized E pop() { E obj; int len = size(); obj = peek(); removeElementAt(len - 1); return obj; } ``` * **peek\(\)**:獲取最后一個元素 ``` public synchronized E peek() { int len = size(); if (len == 0) throw new EmptyStackException(); return elementAt(len - 1); } ```
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