08_stack

Author: wangzheng

java/08_stack/StackBasedLinkedList.java

@@ -0,0 +1,54 @@
+package stack;
+
+/**
+ * 基于链表实现的栈。
+ *
+ * Author: Zheng
+ */
+public class StackBasedLinkedList {
+ 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;
+ }
+ }
+}