java--输入月份输出相应的季节

import java.util.Scanner;
class Demo4{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
System.out.println("请输入一个月份");
int a = sc.nextInt();
if (a>=3 && a<=5) {
System.out.println("春天");
}else if (a>=6 && a<=8) {
System.out.println("夏天");
}else if (a>=9 && a<=11 ){
System.out.println("秋天");
}else if (a==12) {
System.out.println("冬天");
}else if (a>=1 && a<=2) {
System.out.println("冬天");
}else {
System.out.println("你输入的月份有误");
}
}
}