javaint类型无法转换为布尔类型

求解这个哪里有问题

import java.util.Calendar;

public class Demo1 {
    String weekData="";
    Calendar calendar = Calendar.getInstance();
    int week = calendar.get(Calendar.DAY_OF_WEEK)-1;
    switch (week) {
        case 0:
            weekDate = "星期日";
            break;
        case 1:
            weekDate = "星期一";
            break;
        case 2:
            weekDate = "星期二";
            break;
        case 3:
            weekDate = "星期三";
            break;
        case 4:
            weekDate = "星期四";
            break;
        case 5:
            weekDate = "星期五";
            break;
        case 6:
            weekDate = "星期六";
            break;
    }
    System.out.println("今天是 " + weekDate);
}

}



```！

你这报错太正常了，你的主函数main()方法没有，根本运行不起来的
另外你的weekData-->weekDate或者weekDate-->weekData就可以了
演示截图