请输入某个月份（1~12）

每天2小时java学习， 今天最后一段要学习的内容是
import java.util.Scanner;

public class Seasons {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("请输入某个月份（1~12）：");
int month = sc.nextInt();
if (month < 1 || month > 12) {
System.out.println("警告：您在非法操作……");
} else {
switch (month) {
case 3:
case 4:
case 5:
System.out.println(month + "月正值春季");
break;
case 6:
case 7:
case 8:
System.out.println(month + "月正值夏季");
break;
case 9:
case 10:
case 11:
System.out.println(month + "月正值秋季");
break;
case 12:
case 1:
case 2:
System.out.println(month + "月正值冬季");
break;
}
}
sc.close();
}
}