栈的Java实现
1、实现栈用Stack类，此类是Vector类的子类；
1 import java.util.Stack; 2 3 public class Stacks { 4 static String[] months = {"Janunary","February","March","aprile","May","June","July","Aug","Sep", 5 "October","November"}; 6 public static void main(String[] args) { 7 Stack stk = new Stack(); 8 9 for(int i=0;i<months.length;i++) 10 stk.push(months[i] + " "); //压栈 11 12 System.out.println("stk = " + stk); 13 14 stk.addElement("The last line"); //栈顶元素 15 stk.addElement("The last line1"); 16 System.out.println("element 5 = " + stk.elementAt(11)); 17 System.out.println("popping element;"); 18 while(!stk.empty()) 19 System.out.println(stk.pop()); //出栈 20 } 21 }
输出结果为：
stk = [Janunary , February , March , aprile , May , June , July , Aug , Sep , October , November ]
element 5 = The last line
popping element;
The last line1
The last line
November
October
Sep
Aug
July
June
May
aprile
March
February
Janunary
2、Stack类的常用方法：
1）boolean empty() 测试栈是否为空
2) peek() 查看栈顶，但不删除
3）pop() 出栈，同时删除
4）push() 入栈
5）int search（Object obj） 查找
