import java.util.LinkedList;

/**
 * java栈数据结构的LinkedList实现
 */
public class LinkedListAsStack {
	LinkedList stack = new LinkedList();

	public void push(Object o1) {
		stack.add(o1);
	}

	public Object pop() {
		return stack.removeLast();
	}

	public Object topEle() {
		return stack.getLast();
	}

	public boolean isEmpty() {
		return stack.isEmpty();
	}

	public void clean() {
		stack.clear();
	}
}