从 ArrayList (Java) 添加到堆栈 [英] Add to stack from ArrayList (Java)

问题描述

我有一个用硬编码值预定义的 ArrayList.如何将这些添加到堆栈中?思路是演示栈类的pop、push、peek功能.

I have an ArrayList pre-defined with hardcoded values. How do I add these to a stack? The idea is to demonstrate the pop, push, peek functions of the stack class.

ArrayList<String> al = new ArrayList<String>();

al.add("A");
al.add("B");
al.add("C");

Stack<String> st = new Stack<String>();

st.push(al); **// This doesn't seem to work.. Will I have to loop it in some way?**

System.out.println(st);

谢谢！

推荐答案

像许多集合类一样，Stack 提供了一个 addAll 方法:

Like many collection classes, Stack provides a addAll method :

st.addAll(al)

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