季节
通过Scanner 输入月份，然后使用switch 判断季节

package HelloWorld;
import java.util.Scanner;

public class signCaculate {
public static void main(String[] args) {
Scanner s=new Scanner(System.in);
int month=s.nextInt();

switch(month){
case 1:
System.out.println("冬天");
break;
case 2:
System.out.println("冬天");
break;
case 12:
System.out.println("冬天");
break;
case 3:
System.out.println("春天");
break;
case 4:
System.out.println("春天");
break;
case 5:
System.out.println("春天");
break;
case 6:
System.out.println("夏天");
break;
case 7:
System.out.println("夏天");
break;
case 8:
System.out.println("夏天");
break;
case 9:
System.out.println("冬天");
break;
case 10:
System.out.println("冬天");
break;
case 11:
System.out.println("冬天");
break;
default:
System.out.println("这个是什么鬼？");
}
}
}