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Java学习_17_集合综合练习（待更新）

news 2025/11/24 8:30:19

文章目录

前言
一、自动点名器
二、斗地主小游戏
- 1、准备牌
- 2、洗牌
- 3、发牌
- 4、理牌
总结

前言

博客仅记录个人学习进度和一些查缺补漏。
学习内容：BV17F411T7Ao

部分内容因没有学到，等待后续更新

一、自动点名器

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        /**** 点名器1，N个学生随机点名*/ArrayList<Student> arrayList = new ArrayList<>();Student student_1 = new Student("aaa", "male", 16);Student student_2 = new Student("bbb", "female", 16);Student student_3 = new Student("ccc", "female", 16);Student student_4 = new Student("ddd", "male", 16);Collections.addAll(arrayList, student_1, student_2, student_3, student_4);System.out.println(arrayList);//随机数法Random rd = new Random();System.out.println(arrayList.get(rd.nextInt(arrayList.size())).getName());//打乱法Collections.shuffle(arrayList);System.out.println(arrayList.get(0).getName());

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       /**** 点名器2，N个学生，70%点名男生，30%点名女生*/ArrayList<Student> arrayList = new ArrayList<>();Student student_1 = new Student("aaa", "male", 16);Student student_2 = new Student("bbb", "female", 16);Student student_3 = new Student("ccc", "female", 16);Student student_4 = new Student("ddd", "male", 16);Collections.addAll(arrayList, student_1, student_2, student_3, student_4);System.out.println(arrayList);//先将男女分开ArrayList<Student> male_Student = new ArrayList<>();ArrayList<Student> female_Student = new ArrayList<>();for (Student student : arrayList) {if(student.getGender().equals("male")) {male_Student.add(student);}else {female_Student.add(student);}}//创建概率数组并打乱ArrayList<Integer> probability = new ArrayList<>();Collections.addAll(probability, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1);Collections.shuffle(probability);System.out.println(probability);//抽取学生Random rd = new Random();int x = probability.get(rd.nextInt(probability.size()));if (x == 0) {System.out.println(male_Student.get(rd.nextInt(male_Student.size())).getName());}else {System.out.println(female_Student.get(rd.nextInt(female_Student.size())).getName());}

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       /**** 点名器3，N个学生，都会点，但是被点到后不会再点了* 所有人点到后重新开始第二轮*/ArrayList<Student> arrayList = new ArrayList<>();Student student_1 = new Student("aaa", "male", 16);Student student_2 = new Student("bbb", "female", 16);Student student_3 = new Student("ccc", "female", 16);Student student_4 = new Student("ddd", "male", 16);Collections.addAll(arrayList, student_1, student_2, student_3, student_4);System.out.println(arrayList);//实际上直接打乱然后顺序点就行了//但是此处是想练习集合删除//点名十轮for (int i = 0; i < 10; i++) {//创建临时集合装被点过的学生ArrayList<Student> arrayList1 = new ArrayList<>();while (!arrayList.isEmpty()){Random rd = new Random();int x = rd.nextInt(arrayList.size());System.out.println(arrayList.get(x).getName());arrayList1.add(arrayList.get(x));arrayList.remove(x);}arrayList.addAll(arrayList1);}

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        /**** 点名器4，后续更新*/

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        /**** 点名器5，后续更新*/

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        /**** 集合嵌套*键是字符串，值是单列集合*///没有特殊要求的情况下默认使用HashMapHashMap<String , ArrayList<String>> hashMap = new HashMap<>();ArrayList<String> city1 = new ArrayList<>();Collections.addAll(city1, "南京市", "扬州市", "苏州市");ArrayList<String> city2 = new ArrayList<>();Collections.addAll(city2, "武汉市", "孝感市", "十堰市");ArrayList<String> city3 = new ArrayList<>();Collections.addAll(city3, "石家庄市", "唐山市", "保定市");hashMap.put("江苏省", city1);hashMap.put("湖北省", city1);hashMap.put("河北省", city1);hashMap.forEach(new BiConsumer<String, ArrayList<String>>() {@Overridepublic void accept(String s, ArrayList<String> strings) {System.out.print(s + " = ");int i = 0;for (String string : strings) {System.out.print(string);if (i != strings.size() - 1) {System.out.print(",");i ++;}}System.out.println();}});

二、斗地主小游戏

1、准备牌

很明显，一张牌有两个属性，花色和数字
在游戏开始时准备一副牌，并且不会随着开始新的一轮游戏而新创建一副牌，需要使用静态代码块

    static {/*** 准备牌*"♦","♣","♥","♠"*"3","4","5","6","7","8","9","10","J","Q","K","A"*/ArrayList<String> colorSet = new ArrayList<>();ArrayList<String> pointSet = new ArrayList<>();//添加花色及点数Collections.addAll(colorSet, "♦","♣","♥","♠");Collections.addAll(pointSet, "3","4","5","6","7","8","9","10","J","Q","K","A","2");for (String color : colorSet) {for (String point: pointSet) {cardSet.add(new Card(color, point));}}//加入大小王cardSet.add(new Card("Black", "Joker"));cardSet.add(new Card("Red", "Joker"));}

2、洗牌

        //洗牌Collections.shuffle(cardSet);

3、发牌

        //发牌//创建玩家牌库ArrayList<Card> lord = new ArrayList<>();ArrayList<Card> player1 = new ArrayList<>();ArrayList<Card> player2 = new ArrayList<>();ArrayList<Card> player3 = new ArrayList<>();//给玩家发牌CardGet(lord, player1, player2, player3);

    public static void CardGet(ArrayList<Card> lord, ArrayList<Card> player1, ArrayList<Card> player2, ArrayList<Card> player3) {int i = 0;//发牌for (int j = 0; j < 3; j++) {lord.add(cardSet.get(i++));player1.add(cardSet.get(i++));player2.add(cardSet.get(i++));player3.add(cardSet.get(i++));}while (i < cardSet.size()) {player1.add(cardSet.get(i++));player2.add(cardSet.get(i++));player3.add(cardSet.get(i++));}

4、理牌

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    //理牌public static void CardSort(ArrayList<Card> card) {//添加花色及点数ArrayList<String> colorSet = new ArrayList<>();ArrayList<String> pointSet = new ArrayList<>();Collections.addAll(colorSet, "♦","♣","♥","♠","Red","Black");Collections.addAll(pointSet, "3","4","5","6","7","8","9","10","J","Q","K","A","2","Joker");card.sort(new Comparator<Card>() {@Overridepublic int compare(Card o1, Card o2) {int i = pointSet.indexOf(o1.getPoint()) - pointSet.indexOf(o2.getPoint());i = i == 0 ? colorSet.indexOf(o1.getPoint()) - colorSet.indexOf(o2.getPoint()) : i;return i;}});}