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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                ``` // "static void main" must be defined in a public class. class MyQueue { // 存放數據的數組 private List<Integer> data; // 表明隊頭元素位置,index=1,不光是隊頭元素為1,而且已經出隊了一個元素 private int p_start; //隊列初始化 public MyQueue() { data = new ArrayList<Integer>(); p_start = 0; } /** 從隊尾插入一個元素,并且不需要隊尾指針記錄*/ public boolean enQueue(int x) { data.add(x); return true; }; /** 出隊一個元素 */ public boolean deQueue() { //首先判斷不為空 if (isEmpty() == true) { //隊列空,出隊失敗 return false; } //出隊一個元素,記錄隊頭的元素位置的值加1 p_start++; return true; } /** 根據頭指針索引得到隊頭元素*/ public int Front() { return data.get(p_start); } public boolean isEmpty() { //如果出隊的元素大于等于隊列中元素個數,則隊列已經為空 return p_start >= data.size(); } }; public class Main { public static void main(String[] args) { MyQueue q = new MyQueue(); //添加元素 q.enQueue(5); q.enQueue(3); //隊列不為空,打印隊頭位置 if (q.isEmpty() == false) { System.out.println(q.Front()); } //出隊, q.deQueue(); //隊列不為空,打印隊頭位置 if (q.isEmpty() == false) { System.out.println(q.Front()); } q.deQueue(); if (q.isEmpty() == false) { System.out.println(q.Front()); } } } ```
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                              哎呀哎呀视频在线观看