JAVA深入集合--Stack
publicclass Stack<E> extends Vector<E> { public Stack() { } public E push(E item) {addElement(item);return item; } public synchronized E pop() {Eobj;intlen = size();obj = peek();removeElementAt(len - 1);return obj; } public synchronized E peek() {intlen = size();if (len == 0) throw new EmptyStackException();return elementAt(len - 1); } public boolean empty() {return size() == 0; } public synchronized int search(Object o) {int i = lastIndexOf(o);if (i >= 0) { return size() - i;}return -1; }}

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2.?深刻体会到了OO?的深意啊-?-，扩展几个方法就是新的对象了。看来上网本?和?笔记本差距原来没那么大！