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package com.zejian.structures.Stack;

/**

* Created by zejian on 2016/11/27.

* Blog : http://blog.csdn.net/javazejian/article/details/53362993 [原文地址,请尊重原创]

* 栈接口抽象数据类型

*/

public interface Stack<T> {

/**

* 栈是否为空

* @return

*/

boolean isEmpty();

/**

* data元素入栈

* @param data

*/

void push(T data);

/**

* 返回栈顶元素,未出栈

* @return

*/

T peek();

/**

* 出栈,返回栈顶元素,同时从栈中移除该元素

* @return

*/

T pop();

}