mystack.java

来自「孙鑫JAVA从入门到精通配套练习程序。所有程序都实际运行过」· Java 代码 · 共 38 行

import java.util.*;
class MyStack
{
	LinkedList ll = new LinkedList();
	public void push(Object o)
	{
		ll.addFirst(o);
	}
	
	public Object pop()
	{
		return ll.removeFirst();
	}
	
	public Object peek()
	{
		return ll.getFirst();
	}
	
	public boolean empty()
	{
		return ll.isEmpty();
	}
	
	public static void main(String[] args)
	{
		MyStack ms = new MyStack();
		ms.push("one");
		ms.push("two");
		ms.push("three");
		
		System.out.println(ms.pop());
		System.out.println(ms.peek());
		System.out.println(ms.pop());
		System.out.println(ms.empty());
	}
	
}