/*
需求： 使用LinkedList存儲一副撲克牌，然後實現洗牌功能。



*/
//撲克類
class Poker{
    String  color; //花色
    String num;    //點數
    public Poker(String color, String num) {
        super();
        this.color = color;
        this.num = num;
    }
    @Override
    public String toString() {
        return "{"+color+num+"}";
    }
}
 
public class Demo2 {
    public static void main(String[] args) {
        LinkedList pokers = createPoker();
        shufflePoker(pokers);
        showPoker(pokers);
    }
    
    //洗牌的功能
    public static void shufflePoker(LinkedList pokers){
        //創建隨機數對象
        Random random = new Random();
        
 
for(int i = 0 ; i <100; i++){ 
            //隨機產生兩個索引值
            int index1 = random.nextInt(pokers.size());
            int index2 = random.nextInt(pokers.size());
            //根據索引值取出兩張牌，然後交換兩張牌的順序
            Poker poker1 =  (Poker) pokers.get(index1);
            Poker poker2 =  (Poker) pokers.get(index2);
            pokers.set(index1, poker2);
            pokers.set(index2, poker1);
        }
        
    }
    
 
//顯示撲克牌
    public static void showPoker(LinkedList pokers){
        for(int i = 0 ; i<pokers.size() ; i++){
            System.out.print(pokers.get(i));
            //換行
            if(i%10==9){
                System.out.println();
            }
        }
    
    }
    //生成撲克牌的方法
    public static LinkedList createPoker(){
        //該集合用於存儲撲克對象。
        LinkedList list = new LinkedList();        
        //定義數組存儲所有的花色與點數
        String[] colors = {"黑桃","紅桃","梅花","方塊"};
        String[] nums = {"A","2","3","4","5","6","7","8","9","10","J","Q","K"};
        for(int i = 0 ; i < nums.length ; i++){
            for(int j = 0 ; j<colors.length ; j++){
                list.add(new Poker(colors[j], nums[i]));
            }
        }
        return list;
    }
}

/*需求： 使用LinkedList存儲一副撲克牌，然後實現洗牌功能。


*///撲克類class Poker{String color; //花色String num;//點數public Poker(String color, String num) {super();this.color = color;this.num = num;}@Overridepublic String toString() {return "{"+color+num+"}";}}public class Demo2 {public static void main(String[] args) {LinkedList pokers = createPoker();shufflePoker(pokers);showPoker(pokers);}//洗牌的功能public static void shufflePoker(LinkedList pokers){//創建隨機數對象Random random = new Random();for(int i = 0 ; i <100; i++){ //隨機產生兩個索引值int index1 = random.nextInt(pokers.size());int index2 = random.nextInt(pokers.size());//根據索引值取出兩張牌，然後交換兩張牌的順序Poker poker1 = (Poker) pokers.get(index1);Poker poker2 = (Poker) pokers.get(index2);pokers.set(index1, poker2);pokers.set(index2, poker1);}}//顯示撲克牌public static void showPoker(LinkedList pokers){for(int i = 0 ; i<pokers.size() ; i++){System.out.print(pokers.get(i));//換行if(i%10==9){System.out.println();}}}//生成撲克牌的方法public static LinkedList createPoker(){//該集合用於存儲撲克對象。LinkedList list = new LinkedList();//定義數組存儲所有的花色與點數String[] colors = {"黑桃","紅桃","梅花","方塊"};String[] nums = {"A","2","3","4","5","6","7","8","9","10","J","Q","K"};for(int i = 0 ; i < nums.length ; i++){for(int j = 0 ; j<colors.length ; j++){list.add(new Poker(colors[j], nums[i]));}}return list;}}

使用LinkedList存儲一副撲克牌，然後實現洗牌功能。