/**
 * 考核：泛型使用；字符值匹配判断；数组集合操作
 * 题目：
 * 1. 获取15个整型随机数1-31，存放在data中
 * 2. 遍历data,判断是否重复，若重复则移除掉（使用list删除元素的方法）
 * 3. 使用枚举WeekEnum存放英文缩写常量和中文常量，如: MON-星期一；TUE-星期二
 * 4. 题1判断星期几后输出英文缩写常量和中文常量: 如14,TUE,星期二
 */
public class Main03 {

    public static void main(String[] args) {

        // 设置本月第一天为周六
        Integer firstWeek = 6;
        Integer index = 7 - firstWeek + 1; // 算出偏移量

        //随机数存放
        List<Integer> data = new ArrayList<>();
        Random random = new Random();
        while (data.size() <= 15) {
            Integer num = random.nextInt(31) + 1;
            if (!data.contains(num)) {
                data.add(num);
                Integer day = (num - index) % 7; // 取余数
                switch (day) {
                    case 0:
                        System.out.println(num + "," + WeekEnum.SUN.getWeekEn() + "," + WeekEnum.SUN.getWeekCn());
                        break;
                    case 1:
                        System.out.println(num + "," + WeekEnum.MON.getWeekEn() + "," + WeekEnum.MON.getWeekCn());
                        break;
                    case 2:
                        System.out.println(num + "," + WeekEnum.TUE.getWeekEn() + "," + WeekEnum.TUE.getWeekCn());
                        break;
                    case 3:
                        System.out.println(num + "," + WeekEnum.WEN.getWeekEn() + "," + WeekEnum.WEN.getWeekCn());
                        break;
                    case 4:
                        System.out.println(num + "," + WeekEnum.THIR.getWeekEn() + "," + WeekEnum.THIR.getWeekCn());
                        break;
                    case 5:
                        System.out.println(num + "," + WeekEnum.FIR.getWeekEn() + "," + WeekEnum.FIR.getWeekCn());
                        break;
                    case 6:
                        System.out.println(num + "," + WeekEnum.SAT.getWeekEn() + "," + WeekEnum.SAT.getWeekCn());
                        break;
                    default:
                        System.out.println("日期计算有误：" + num);
                        break;
                }
            }
        }
    }
}

 

枚举类：

public enum WeekEnum {

    MON("MON", "星期一"),
    TUE("TUE", "星期二"),
    WEN("WEN", "星期三"),
    THIR("THIR", "星期四"),
    FIR("FIR", "星期五"),
    SAT("SAT", "星期六"),
    SUN("SUN", "星期日"),
    ;

    private String weekEn;
    private String weekCn;

    WeekEnum(String weekEn, String weekCn) {
        this.weekEn = weekEn;
        this.weekCn = weekCn;
    }

    public String getWeekEn() {
        return weekEn;
    }

    public String getWeekCn() {
        return weekCn;
    }
}