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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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