java扑克牌随机乱序洗牌集合Collections.shuffle

缺乏、安全感 2022-01-31 14:51 221阅读 0赞

package com.javabase.p1;
    
    import java.util.ArrayList;
    import java.util.Collections;
    import java.util.Iterator;
    import java.util.List;
    import java.util.Random;
    
    public class Testpoke {
    	
    	
    
    	public static void main(String[] args) {
    		Test_XiPai();
    
    	}
    	
    	/**
    	 * 扑克牌随机洗牌
    	 */
    	public static void Test_XiPai() {
    		String[] pai = {"红心A","红心1","红心2","红心3","红心4","红心5","红心6","红心7","红心8","红心9","红心10","红心K","红心Q","红心J",
    						"黑桃A","黑桃1","黑桃2","黑桃3","黑桃4","黑桃5","黑桃6","黑桃7","黑桃8","黑桃9","黑桃10","黑桃K","黑桃Q","黑桃J",
    						"方块A","方块1","方块2","方块3","方块4","方块5","方块6","方块7","方块8","方块9","方块10","方块K","方块Q","方块J",
    						"梅花A","梅花1","梅花2","梅花3","梅花4","梅花5","梅花6","梅花7","梅花8","梅花9","梅花10","梅花K","梅花Q","梅花J","大王","小王"};
    		//List集合
    		List<String> li = new ArrayList<>();
    		
    		for (int i = 0; i < pai.length; i++) {
    			li.add(pai[i]);
    		}
    		
    		//遍历List
    		Iterator<String> it = li.iterator();
    		while (it.hasNext()) {
    			 String spai = it.next();
    			 System.out.print("<" + spai +">");
    			
    		}
    		
    		System.out.println("\n");
    		
    		//开始准备洗牌
    		Random r = new Random();
    		//打印随机数
    		System.out.println(r.nextInt());
    		
    		//洗牌 随机乱序
    		Collections.shuffle(li,r);
    		
    		//遍历集合list
    		for (int i = 0; i < li.size(); i++) {
    			String rand_pai = li.get(i);
    			System.out.print("<" + rand_pai +">");
    			
    		}
    		
    		
    		
    	
    	
    	}
    
    }