Stack类继承与Vector,而Vector继承此List,Stack表示栈,栈是个算法,表示后进先出,现在写个例子玩玩：

public class StackDemo1 {
			public static void main(String[] args) {
				Stack<String> stack = new Stack<String>();
				stack.add("a");
				stack.add("b");
				stack.add("c");
				stack.add("d");
			}
}

public class StackDemo1 {
			public static void main(String[] args) {
				Stack<String> stack = new Stack<String>();
				stack.push("a");
				stack.push("b");
				stack.push("c");
				stack.push("d");
			}
}

   public synchronized boolean add(E e) {
	modCount++;
	ensureCapacityHelper(elementCount + 1);
	elementData[elementCount++] = e;
        return true;
    }

java中的Stack