[TOC]
# 代码
用之前的链表代码
~~~
public class LinkedListStack<E> implements Stack<E> {
private LinkedList<E> list;
public LinkedListStack() {
list = new LinkedList<E>();
}
@Override
public int getSize() {
return list.getSize();
}
@Override
public boolean isEmpty() {
return list.isEmpty();
}
//入栈
@Override
public void push(E e) {
list.addFirst(e);
}
//出栈
@Override
public E pop() {
return list.removeFirst();
}
@Override
public E peek() {
return list.getFirst();
}
@Override
public String toString() {
StringBuilder res = new StringBuilder();
res.append("Stack: top ");
res.append(list);
return res.toString();
}
public static void main(String[] args) {
LinkedListStack<Integer> stack = new LinkedListStack<Integer>();
for (int i = 0; i < 5; i++) {
stack.push(i);
System.out.println(stack);
}
stack.pop();
System.out.println(stack);
}
}
~~~
# 测试
~~~
public static void main(String[] args) {
LinkedListStack<Integer> stack = new LinkedListStack<Integer>();
for (int i = 0; i < 5; i++) {
stack.push(i);
System.out.println(stack);
}
stack.pop();
System.out.println(stack);
}
~~~
