stackdemo.java

Java面向对象编程(随书配套源代码) 阐述了面向对象编程的思想

package chapter8;

import java.util.*;

class StackDemo
{
    static void showpush(Stack st, int a)
    {
        st.push(new Integer(a));
        System.out.println("push(" + a + ")");
        System.out.println("stack: " + st);
    }

    static void showpop(Stack st)
    {
        System.out.print("pop -> ");
        Integer a = (Integer) st.pop();
        System.out.println(a);
        System.out.println("stack: " + st);
    }

    public static void main(String args[])
    {
        Stack st = new Stack();
        System.out.println("stack: " + st);
        showpush(st, 42);
        showpush(st, 66);
        showpush(st, 99);
        showpop(st);
        showpop(st);
        showpop(st);
        try
        {
            showpop(st);
        }
        catch (EmptyStackException e)
        {
            System.out.println("empty stack");
        }
    }
}