java常用手册

import java.util.Stack;	//引用栈

//初始化
Stack<Integer> stack = new Stack<Integer>();

//进栈
stack.push(Element);

//出栈
Element e = stack.pop();

//取栈顶值（不出栈）
Element e = stack.peek();

//判断栈是否为空
boolean flag = stack.isEmpty();

//获取栈长度
int size - stack.size();