JAVA小练习109——定义一个LinkedList存储一副扑克牌，再定义一个方法可以洗牌的

痛定思痛。 2022-01-22 15:31 199阅读 0赞

import java.util.LinkedList;
    import java.util.Random;
    
    //扑克
    class Poker{
    	
    	String color; //花色
    	
    	String num;   //点数
    
    	public Poker(String color, String num) {
    		super();
    		this.color = color;
    		this.num = num;
    	}
    	
    	@Override
    	public String toString() {
    		return color+num;
    	}
    	
    }
    
    
    public class Demo109 {
    		
    	public static void main(String[] args) {
    		
    		LinkedList pokers = createPoker();
    		shufflePoker(pokers);
    		showPoker(pokers);
    	}
    	
    	
    	
    	//洗牌
    	public static void shufflePoker(LinkedList pokers){
    		Random random = new Random();
    		
    		for(int i = 0 ; i<100 ; i++){
    			//随即产生两个索引值
    			int index1 =  random.nextInt(pokers.size());
    			int index2 =  random.nextInt(pokers.size());
    			//让两张牌的位置交换
    			Poker p1 = (Poker) pokers.get(index1);
    			Poker p2 =  (Poker) pokers.get(index2);
    			
    			pokers.set(index1, p2);
    			pokers.set(index2, p1);
    		}
    		
    	}
    	
    	
    	//显示扑克牌
    	public static void showPoker(LinkedList pokers){
    		for(int i = 0 ; i< pokers.size() ; i++){
    			if(i%10==9){
    				System.out.println(pokers.get(i));
    			}else{
    				System.out.print(pokers.get(i)+",");
    			}
    		}
    	}
    	
    	
    	
    	//生成一副扑克牌
    	public static LinkedList createPoker(){
    		//定义一个集合存储扑克牌
    		LinkedList list = new LinkedList();
    		
    		//定义一个数组存储所有的点数
    		String[] nums = {"A","2","3","4","5","6","7","8","9","10","J","Q","K"};
    		
    		//定义一个数组存储所有的花色
    		String[] colors = {"方块","梅花","红桃","黑桃"};
    		
    		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;
    	}
    	
    }