class Demo4
{
public static void main(String[] args)
{
String week = getWeek(5);
System.out.println(week);
}
public static String getWeek (int num)
{
if (num>7||num<1)
{
return "没有对应的星期";
}
String[] weeks ={""，"周一"，"周二"，"周三"，"周四"，"周五"，"周六"，"周日"};
return weeks[num];
}
}