class demo
{
public static void main (String[] args)
{
int x=4;
switch(x)
{
case: x>12 && x<=0;
System.out.println(x+"月份不存在");
break;
case: x>=3 && x<=5;
System.out.println(x+"春季");
break;
case: x>=6 && x<=8;
System.out.println(x+"夏季");
break;
case: x>=9 && x<=11;
System.out.println(x+"秋季");
break;
default:
System.out.println(x+"冬季");
}
}
}