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StackBasedOnLinkedList.java

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package stack;

/**

* 基于链表实现的栈。

*

* Author: Zheng

*/

public class StackBasedOnLinkedList {

private Node top = null;

public void push(int value) {

Node newNode = new Node(value, null);

// 判断是否栈空

if (top == null) {

top = newNode;

} else {

newNode.next = top;

top = newNode;

}

}

/**

* 我用-1表示栈中没有数据。

*/

public int pop() {

if (top == null) return -1;

int value = top.data;

top = top.next;

return value;

}

public void printAll() {

Node p = top;

while (p != null) {

System.out.print(p.data + " ");

p = p.next;

}

System.out.println();

}

private static class Node {

private int data;

private Node next;

public Node(int data, Node next) {

this.data = data;

this.next = next;

}

public int getData() {

return data;

}

}

}