stack.java

来自「数据结构与算法」· Java 代码 · 共 21 行

package dsa.adt;

import dsa.exception.StackEmptyException;

public interface Stack {
	//返回堆栈的大小
	public int getSize();
	
	//判断堆栈是否为空
	public boolean isEmpty();
	
	//数据元素e入栈
	public void push(Object e);
	
	//栈顶元素出栈
	public Object pop() throws StackEmptyException;
	
	//取栈顶元素
	public Object peek() throws StackEmptyException;
}