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41 lines
1.0 KiB
41 lines
1.0 KiB
/**
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* File: stack.java
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* Created Time: 2022-11-25
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* Author: krahets (krahets@163.com)
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*/
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package chapter_stack_and_queue;
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import java.util.*;
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public class stack {
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public static void main(String[] args) {
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/* 初始化堆疊 */
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Stack<Integer> stack = new Stack<>();
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/* 元素入堆疊 */
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stack.push(1);
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stack.push(3);
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stack.push(2);
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stack.push(5);
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stack.push(4);
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System.out.println("堆疊 stack = " + stack);
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/* 訪問堆疊頂元素 */
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int peek = stack.peek();
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System.out.println("堆疊頂元素 peek = " + peek);
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/* 元素出堆疊 */
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int pop = stack.pop();
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System.out.println("出堆疊元素 pop = " + pop + "，出堆疊後 stack = " + stack);
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/* 獲取堆疊的長度 */
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int size = stack.size();
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System.out.println("堆疊的長度 size = " + size);
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/* 判斷是否為空 */
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boolean isEmpty = stack.isEmpty();
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System.out.println("堆疊是否為空 = " + isEmpty);
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}
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}
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