Java模拟获取随机车牌号的两种方式

偏执的太偏执、 2023-10-07 18:18 62阅读 0赞

通过简单的几行代码，模拟用户选车牌的业务场景，这边只是简单的获取随机车牌，没有任何业务交互！这边提供了2种方式获取随机车牌，首先是定义好字母数组和车牌数组，**方式一是每个字符都是随机获取字母或数字**，**方式二是把字母和数字都放在集合种，每次都打乱集合的顺序，获取集合的前5个元素**。个人觉得方式一更好些！

有兴趣的可以做一个延伸，例如：显示过的再一次执行的时候就直接过滤掉等

以下是源码：

public class CarNumberController {
        
    
        private static Random random = new Random();
        private static final String[] arr1 = {
        "A","B","C","D","E","F","G","H","J","K","L","M","N","P","Q","R","S","T","U","V","W","X","Y","Z"};
        private static final String[] arr2 = {
        "0","1","2","3","4","5","6","7","8","9"};
        private static final boolean[] arr3 = {
        false,true};
    
        //获取随机字符（字母或数字）
        public static String getSingleStr(boolean flag){
        
            if (flag) {
        
                return arr1[random.nextInt(arr1.length)];
            } else {
        
                return arr2[random.nextInt(arr2.length)];
            }
        }
    
        //方式一
        public static String method1(){
        
            StringBuilder sb = new StringBuilder();
            sb.append("苏U");
            for (int j = 0; j < 5; j++) {
        
                sb.append(getSingleStr(arr3[random.nextInt(arr3.length)]));
            }
            return sb.toString();
        }
    
        //方式二
        public static String method2(){
        
            List<String> list = new ArrayList<>();
            list.addAll(Arrays.asList(arr1));
            list.addAll(Arrays.asList(arr2));
            Collections.shuffle(list);
            StringBuilder sb = new StringBuilder();
            sb.append("苏U");
            for (int i = 0; i < 5; i++) {
        
                sb.append(list.get(i));
            }
            return sb.toString();
        }
    
        public static void main(String[] args) {
        
            List<String> list = new ArrayList<>(50);
            for (int i = 0; i < 50; i++) {
        
                list.add(method1());
    //            list.add(method2());
            }
            System.out.println(list);
        }
    }

运行结果如下：  
![运行结果展示][watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBASm9uIFlvdW5n_size_20_color_FFFFFF_t_70_g_se_x_16]

[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBASm9uIFlvdW5n_size_20_color_FFFFFF_t_70_g_se_x_16]: https://img-blog.csdnimg.cn/9c1a3cdef3924ac7bd23f247cfa8e5d7.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBASm9uIFlvdW5n,size_20,color_FFFFFF,t_70,g_se,x_16